Mercedes-Benz Vehicle Models Mercedes SL 2012-present Torque Specifications
Mercedes-Benz Vehicle Models Mercedes SL 2012-present

Mercedes-Benz Vehicle Models Mercedes SL 2012-present Torque Specifications

Complete Mercedes-Benz Vehicle Models Mercedes SL 2012-present torque specifications guide. Includes factory-specified torque values, torque sequences, and technical specifications for all components including body, brakes, drivetrain, electrical, emissions sensors, fuel, exhaust, HVAC, and suspension. Essential information for proper assembly and maintenance.

Updated

Important Information

Safety guidelines and reference information for proper torque application

Quick Reference Guide

ft-lbs → Nm
× 1.356
ft-lbs → kg-m
× 0.138
Nm → ft-lbs
× 0.738
in-lbs → ft-lbs
× 0.083

Common Torque Patterns

Star Pattern

Used for wheels and other circular bolt patterns

Star Pattern torque pattern diagram showing proper bolt tightening sequence
Cross Pattern

Used for gaskets and cover plates

Cross Pattern torque pattern diagram showing proper bolt tightening sequence
Sequential Pattern

Used for head bolts and other critical components

Sequential Pattern torque pattern diagram showing proper bolt tightening sequence

Common Mistakes to Avoid

Over-tightening

Exceeding the specified torque value can stretch or break fasteners, damage threads, or crack components.

Prevention:

Always use a calibrated torque wrench and follow specifications exactly.

Incorrect Torque Sequence

Tightening bolts in the wrong order can cause uneven pressure distribution and potential leaks or damage.

Prevention:

Follow the manufacturer's specified torque sequence pattern.

Dirty Threads

Dirt, rust, or old thread locker can affect torque readings and proper fastener tension.

Prevention:

Clean and inspect all threads before assembly. Use new thread locker if specified.

Reusing TTY Bolts

Torque-to-yield bolts are designed to stretch and must not be reused.

Prevention:

Always replace TTY bolts with new ones. They are single-use only.

Dry vs. Lubricated

Not accounting for whether torque specs are for dry or lubricated fasteners can lead to incorrect tension.

Prevention:

Check if specs are for dry or lubricated threads. Use specified lubricant when required.

Recommended Tools

Torque Wrench (1/4" Drive)

Range: 2-25 ft-lbs
Small fasteners, delicate components

Torque Wrench (3/8" Drive)

Range: 10-100 ft-lbs
Most common automotive fasteners

Torque Wrench (1/2" Drive)

Range: 30-250 ft-lbs
Large fasteners, wheels

Angle Gauge

Torque-to-yield (TTY) bolts

Torque Wrench Care

  • Calibrate annually or after 5,000 clicks
  • Store at lowest setting
  • Keep clean and lubricated

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Torque Calculator

Convert between different torque units

3.0l Engine

Torque specifications for 3.0L Engine

Cylinder Head

1

Cylinder Head Bolts

M10 x 1.5
Torque Specification
1. 22 ft-lbs (30 N·m) 2. 90°
Important Notes
Follow the manufacturer's specified torque sequence for cylinder head bolts. Failure to do so may result in head gasket failure.
2

Valve Cover Bolts

M6 x 1.0
Torque Specification
7 ft-lbs (10 N·m)
Important Notes
Ensure the valve cover gasket is properly seated before tightening.

Crankshaft And Bearings

1

Main Bearing Bolts

M12 x 1.5
Torque Specification
70 ft-lbs (95 N·m)
Important Notes
Follow the manufacturer's specified torque sequence for main bearing bolts.
2

Connecting Rod Nuts

M8 x 1.25
Torque Specification
15 ft-lbs (20 N·m)
Important Notes
Ensure the connecting rod bearings are properly seated before tightening.

Timing System

1

Camshaft Sprocket Bolt

M12 x 1.5
Torque Specification
67 ft-lbs (90 N·m)
Important Notes
Ensure the timing marks are aligned before tightening.
2

Timing Belt/Chain Tensioner Bolt

M8 x 1.25
Torque Specification
15 ft-lbs (20 N·m)
Important Notes
Ensure proper tension on the timing belt/chain before tightening.

Intake And Exhaust

1

Intake Manifold Bolts

M8 x 1.25
Torque Specification
15 ft-lbs (20 N·m)
Important Notes
Follow the manufacturer's specified torque sequence for intake manifold bolts.
2

Exhaust Manifold/Headers Bolts

M10 x 1.25
Torque Specification
26 ft-lbs (35 N·m)
Important Notes
Follow the manufacturer's specified torque sequence for exhaust manifold bolts.

Lubrication System

1

Oil Pan Bolts

M6 x 1.0
Torque Specification
7 ft-lbs (10 N·m)
Important Notes
Ensure the oil pan gasket is properly seated before tightening.
2

Oil Drain Plug Bolt

M14 x 1.5
Torque Specification
22 ft-lbs (30 N·m)
Important Notes
Replace the crush washer to ensure a proper seal.

3.0l V6 Engine

Torque specifications for 3.0L-V6 Engine

Cylinder Head

1

Cylinder Head Bolts

M10 x 1.5
Torque Specification
1. 22 ft-lbs (30 N·m) 2. 90°
Important Notes
Follow the manufacturer's specified torque sequence for cylinder head bolts. Failure to do so may result in head gasket failure.
2

Valve Cover Bolts

M6 x 1.0
Torque Specification
7 ft-lbs (10 N·m)
Important Notes
Ensure the valve cover gasket is properly seated before tightening.

Crankshaft And Bearings

1

Main Bearing Bolts

M12 x 1.5
Torque Specification
70 ft-lbs (95 N·m)
Important Notes
Follow the manufacturer's specified torque sequence for main bearing bolts.
2

Connecting Rod Nuts

M8 x 1.25
Torque Specification
15 ft-lbs (20 N·m)
Important Notes
Ensure the connecting rod bearings are properly seated before tightening.

Timing System

1

Camshaft Sprocket Bolt

M12 x 1.5
Torque Specification
67 ft-lbs (90 N·m)
Important Notes
Ensure the timing marks are aligned before tightening.
2

Timing Belt/Chain Tensioner Bolt

M8 x 1.25
Torque Specification
15 ft-lbs (20 N·m)
Important Notes
Ensure proper tension on the timing belt/chain before tightening.

Intake And Exhaust

1

Intake Manifold Bolts

M8 x 1.25
Torque Specification
15 ft-lbs (20 N·m)
Important Notes
Follow the manufacturer's specified torque sequence for intake manifold bolts.
2

Exhaust Manifold/Headers Bolts

M10 x 1.25
Torque Specification
26 ft-lbs (35 N·m)
Important Notes
Follow the manufacturer's specified torque sequence for exhaust manifold bolts.

Lubrication System

1

Oil Pan Bolts

M6 x 1.0
Torque Specification
7 ft-lbs (10 N·m)
Important Notes
Ensure the oil pan gasket is properly seated before tightening.
2

Oil Drain Plug Bolt

M14 x 1.5
Torque Specification
22 ft-lbs (30 N·m)
Important Notes
Replace the crush washer to ensure a proper seal.

4.7l Engine

Torque specifications for 4.7L Engine

Cylinder Head and Valve Train

1

Cylinder Head Bolts

M12 x 1.5
Torque Specification
22 ft-lbs (30 N·m)
Important Notes
Ensure proper torque sequence to avoid damaging the cylinder head or engine block.
2

Valve Cover Bolts

M8 x 1.25
Torque Specification
7 ft-lbs (10 N·m)
Important Notes
Ensure the valve cover is properly seated before tightening the bolts.
3

Rocker Arms/Shafts Bolts

M10 x 1.5
Torque Specification
22 ft-lbs (30 N·m)
Important Notes
Ensure the rocker arms or shafts are properly seated before tightening the bolts.

Engine Block and Main Bearings

1

Main Bearing Bolts

M14 x 2.0
Torque Specification
70 ft-lbs (95 N·m)
Important Notes
Ensure proper torque sequence to avoid damaging the main bearings or engine block.
2

Engine Block to Transmission Bellhousing Bolts

M12 x 1.5
Torque Specification
59 ft-lbs (80 N·m)
Important Notes
Ensure the engine block is properly aligned with the transmission bellhousing before tightening the bolts.

Crankshaft and Connecting Rods

1

Connecting Rod Nuts

M10 x 1.5
Torque Specification
15 ft-lbs (20 N·m)
Important Notes
Ensure the connecting rods are properly seated before tightening the nuts.
2

Crankshaft Pulley/Harmonic Balancer Bolt

M16 x 2.0
Torque Specification
133 ft-lbs (180 N·m)
Important Notes
Ensure the crankshaft pulley or harmonic balancer is properly seated before tightening the bolt.

Timing and Accessory Components

1

Timing Belt/Chain Tensioner Bolt

M10 x 1.5
Torque Specification
15 ft-lbs (20 N·m)
Important Notes
Ensure the timing belt or chain tensioner is properly seated before tightening the bolt.
2

Camshaft Sprocket Bolt

M12 x 1.5
Torque Specification
67 ft-lbs (90 N·m)
Important Notes
Ensure the camshaft sprocket is properly seated before tightening the bolt.

Oil and Cooling Components

1

Oil Pan Bolts

M8 x 1.25
Torque Specification
7 ft-lbs (10 N·m)
Important Notes
Ensure the oil pan is properly seated before tightening the bolts.
2

Oil Filter Housing Bolt

M10 x 1.5
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
Ensure the oil filter housing is properly seated before tightening the bolt.
3

Water Pump Bolts

M10 x 1.5
Torque Specification
15 ft-lbs (20 N·m)
Important Notes
Ensure the water pump is properly seated before tightening the bolts.

Engine Mounts and Exhaust Components

1

Engine Mounting Bolts

M12 x 1.5
Torque Specification
37 ft-lbs (50 N·m)
Important Notes
Ensure the engine mounts are properly seated before tightening the bolts.
2

Exhaust Manifold to Engine Block Bolts

M10 x 1.5
Torque Specification
26 ft-lbs (35 N·m)
Important Notes
Ensure the exhaust manifold is properly seated before tightening the bolts.

4.7l V8 Engine

Torque specifications for 4.7L-V8 Engine

Cylinder Head and Valve Train

1

Cylinder Head Bolts

M12 x 1.5
Torque Specification
22 ft-lbs (30 N·m)
Important Notes
Ensure proper torque sequence to avoid damaging the cylinder head or engine block.
2

Valve Cover Bolts

M8 x 1.25
Torque Specification
7 ft-lbs (10 N·m)
Important Notes
Ensure the valve cover is properly seated before tightening the bolts.
3

Rocker Arms/Shafts Bolts

M10 x 1.5
Torque Specification
22 ft-lbs (30 N·m)
Important Notes
Ensure the rocker arms or shafts are properly seated before tightening the bolts.

Engine Block and Main Bearings

1

Main Bearing Bolts

M14 x 2.0
Torque Specification
70 ft-lbs (95 N·m)
Important Notes
Ensure proper torque sequence to avoid damaging the main bearings or engine block.
2

Engine Block to Transmission Bellhousing Bolts

M12 x 1.5
Torque Specification
59 ft-lbs (80 N·m)
Important Notes
Ensure the engine block is properly aligned with the transmission bellhousing before tightening the bolts.

Crankshaft and Connecting Rods

1

Connecting Rod Nuts

M10 x 1.5
Torque Specification
15 ft-lbs (20 N·m)
Important Notes
Ensure the connecting rods are properly seated before tightening the nuts.
2

Crankshaft Pulley/Harmonic Balancer Bolt

M16 x 2.0
Torque Specification
133 ft-lbs (180 N·m)
Important Notes
Ensure the crankshaft pulley or harmonic balancer is properly seated before tightening the bolt.

Timing and Accessory Components

1

Timing Belt/Chain Tensioner Bolt

M10 x 1.5
Torque Specification
15 ft-lbs (20 N·m)
Important Notes
Ensure the timing belt or chain tensioner is properly seated before tightening the bolt.
2

Camshaft Sprocket Bolt

M12 x 1.5
Torque Specification
67 ft-lbs (90 N·m)
Important Notes
Ensure the camshaft sprocket is properly seated before tightening the bolt.

Oil and Cooling Components

1

Oil Pan Bolts

M8 x 1.25
Torque Specification
7 ft-lbs (10 N·m)
Important Notes
Ensure the oil pan is properly seated before tightening the bolts.
2

Oil Filter Housing Bolt

M10 x 1.5
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
Ensure the oil filter housing is properly seated before tightening the bolt.
3

Water Pump Bolts

M10 x 1.5
Torque Specification
15 ft-lbs (20 N·m)
Important Notes
Ensure the water pump is properly seated before tightening the bolts.

Engine Mounts and Exhaust Components

1

Engine Mounting Bolts

M12 x 1.5
Torque Specification
37 ft-lbs (50 N·m)
Important Notes
Ensure the engine mounts are properly seated before tightening the bolts.
2

Exhaust Manifold to Engine Block Bolts

M10 x 1.5
Torque Specification
26 ft-lbs (35 N·m)
Important Notes
Ensure the exhaust manifold is properly seated before tightening the bolts.

7g Tronic Transmission

Torque specifications for 7g Tronic Transmission

Transmission Mounting

1

Transmission Mounting Bolts

M12 x 1.5
Torque Specification
59 ft-lbs (80 N·m)
Important Notes
Secure the transmission to the engine block or transmission crossmember.

Transmission Oil Pan

1

Transmission Oil Pan Bolts

M8 x 1.25
Torque Specification
7 ft-lbs (10 N·m)
Important Notes
Secure the oil pan to the transmission.

Transmission Fluid System

1

Transmission Drain and Fill Plugs

M14 x 1.5
Torque Specification
22 ft-lbs (30 N·m)
Important Notes
Allow for the transmission fluid to be drained and filled.
2

Transmission Fluid Drain/Fill Plug

M14 x 1.5
Torque Specification
22 ft-lbs (30 N·m)
Important Notes
Specific to the transmission fluid system.

Transmission Pan Gasket

1

Transmission Pan Gasket Bolts

M10 x 1.25
Torque Specification
11 ft-lbs (15 N·m)
Important Notes
Estimated value based on industry standards for similar applications. Secure the transmission pan gasket to the transmission.

Valve Body

1

Valve Body Bolts

M12 x 1.5
Torque Specification
16 ft-lbs (22 N·m)
Important Notes
Estimated value based on industry standards for similar applications. Secure the valve body to the transmission.

Solenoid Pack

1

Solenoid Pack Bolts

M10 x 1.25
Torque Specification
11 ft-lbs (15 N·m)
Important Notes
Estimated value based on industry standards for similar applications. Secure the solenoid pack to the transmission.

Torque Converter

1

Torque Converter Bolts

M14 x 1.5
Torque Specification
32 ft-lbs (43 N·m)
Important Notes
Estimated value based on industry standards for similar applications. Secure the torque converter to the transmission.

9g Tronic Transmission

Torque specifications for 9g Tronic Transmission

Transmission Mounting

1

Transmission Mounting Bolts

M12 x 1.5
Torque Specification
59 ft-lbs (80 N·m)
Important Notes
These bolts are critical for transmission alignment and vibration prevention.

Transmission Oil Pan

1

Transmission Oil Pan Bolts

M8 x 1.25
Torque Specification
7 ft-lbs (10 N·m)
Important Notes
These bolts are critical for preventing oil leaks and ensuring proper lubrication.

Transmission Fluid System

1

Transmission Drain and Fill Plugs

M14 x 1.5
Torque Specification
22 ft-lbs (30 N·m)
Important Notes
These plugs are critical for preventing leaks and ensuring accurate fluid level monitoring.
2

Transmission Fluid Drain/Fill Plug

M14 x 1.5
Torque Specification
22 ft-lbs (30 N·m)
Important Notes
This plug is specific to the transmission fluid system and requires proper torque to prevent leaks and ensure accurate fluid level monitoring.

Transmission Pan Gasket

1

Transmission Pan Gasket Bolts

M10 x 1.25
Torque Specification
11 ft-lbs (15 N·m)
Important Notes
These bolts are critical for preventing oil leaks and ensuring proper sealing. The recommended torque value is based on industry standards for similar applications.

Valve Body Cover

1

Valve Body Cover Bolts

M10 x 1.25
Torque Specification
11 ft-lbs (15 N·m)
Important Notes
These bolts are critical for preventing fluid leaks and ensuring proper hydraulic pressure. The recommended torque value is based on industry standards for similar applications.

Solenoid Pack

1

Solenoid Pack Bolts

M10 x 1.25
Torque Specification
11 ft-lbs (15 N·m)
Important Notes
These bolts are critical for ensuring proper electrical connections and preventing fluid leaks. The recommended torque value is based on industry standards for similar applications.

Torque Converter

1

Torque Converter Bolts

M14 x 1.5
Torque Specification
35 ft-lbs (47 N·m)
Important Notes
These bolts are critical for ensuring proper alignment and preventing movement or vibration that could affect transmission performance. The recommended torque value is based on industry standards for similar applications.

Body

Torque specifications for Body

Suspension and Steering

1

Strut/Shock Absorber Mounting Bolts

M14 x 1.5
Torque Specification
85 ft-lbs (115 N·m)
2

Control Arm Bolts

M14 x 1.5
Torque Specification
85 ft-lbs (115 N·m)
3

Steering Gear/Rack Bolts

M14 x 1.5
Torque Specification
85 ft-lbs (115 N·m)

Brake System

1

Brake Caliper Bolts

M12 x 1.25
Torque Specification
80 ft-lbs (110 N·m)
2

Brake Caliper Mounting Bracket Bolts

M14 x 1.5
Torque Specification
100 ft-lbs (135 N·m)

Wheels and Hubs

1

Wheel Lug Nuts

M14 x 1.5
Torque Specification
96 ft-lbs (130 N·m)

Body and Frame

1

Body Mounting Bolts

M12 x 1.25
Torque Specification
37 ft-lbs (50 N·m)
Important Notes
Estimated value based on general industry standards.
2

Door Hinge Bolts

M10 x 1.25
Torque Specification
15 ft-lbs (20 N·m)
Important Notes
Estimated value based on general industry standards.
3

Hood and Trunk Lid Hinge Bolts

M10 x 1.25
Torque Specification
15 ft-lbs (20 N·m)
Important Notes
Estimated value based on general industry standards.
4

Bumper Mounting Bolts

M12 x 1.25
Torque Specification
37 ft-lbs (50 N·m)
Important Notes
Estimated value based on general industry standards.

Brakes

Torque specifications for Brakes

Brake Caliper

1

Brake Caliper Bolts

M12 x 1.5
Torque Specification
80 ft-lbs (110 N·m)
Important Notes
These bolts secure the brake caliper to the mounting bracket. Proper torque ensures the caliper remains securely attached.
2

Brake Caliper Mounting Bracket Bolts

M14 x 1.5
Torque Specification
100 ft-lbs (135 N·m)
Important Notes
These bolts attach the caliper mounting bracket to the steering knuckle or axle.
3

Brake Hose Banjo Bolt

M8 x 1.25
Torque Specification
22 ft-lbs (30 N·m)
Important Notes
This bolt connects the brake hose to the caliper or brake line. Estimated value based on similar brake hose connections.

Brake Disc Drum

1

Brake Disc/Drum Retaining Bolts

M10 x 1.25
Torque Specification
70 ft-lbs (95 N·m)
Important Notes
These bolts secure the brake disc (rotor) or drum to the wheel hub.

Wheel Hub

1

Wheel Lug Nuts

M14 x 1.5
Torque Specification
96 ft-lbs (130 N·m)
Important Notes
These nuts secure the wheel to the hub, which houses the brake components.
2

ABS Sensor Mounting Bolts

M6 x 1.0
Torque Specification
7 ft-lbs (10 N·m)
Important Notes
These bolts secure the ABS sensor to the wheel hub or steering knuckle. Estimated value based on similar sensor mounting bolts.

Brake Pedal Master Cylinder

1

Brake Master Cylinder Mounting Bolts

M8 x 1.25
Torque Specification
15 ft-lbs (20 N·m)
Important Notes
These bolts secure the master cylinder to the brake booster or firewall. Estimated value based on similar master cylinder mounting bolts.
2

Brake Pedal Assembly Bolts

M8 x 1.25
Torque Specification
22 ft-lbs (30 N·m)
Important Notes
These bolts secure the brake pedal assembly to the firewall or pedal box. Estimated value based on similar pedal assembly bolts.

Drivetrain

Torque specifications for Drivetrain

Engine Block and Crankshaft

1

Main Bearing Bolts

M14 x 1.5
Torque Specification
70 ft-lbs (95 N·m)
Important Notes
Proper torque ensures the bearings are seated correctly and prevents engine damage.
2

Crankshaft Pulley/Harmonic Balancer Bolt

M16 x 1.5
Torque Specification
133 ft-lbs (180 N·m)
Important Notes
Proper torque ensures the pulley or balancer is securely attached and prevents engine damage.

Crankshaft and Connecting Rods

1

Connecting Rod Nuts

M12 x 1.25
Torque Specification
15 ft-lbs (20 N·m)
Important Notes
Proper torque ensures the rods are securely attached and prevents engine damage.

Camshaft and Valvetrain

1

Camshaft Sprocket Bolt

M14 x 1.5
Torque Specification
67 ft-lbs (90 N·m)
Important Notes
Proper torque ensures the sprocket is securely attached and prevents engine damage.

Flywheel and Clutch

1

Flywheel Bolts

M14 x 1.5
Torque Specification
67 ft-lbs (90 N·m)
Important Notes
Proper torque ensures the flywheel is securely attached and prevents engine damage.

Transmission and Transfer Case

1

Transmission Mounting Bolts

M12 x 1.25
Torque Specification
59 ft-lbs (80 N·m)
Important Notes
Proper torque ensures the transmission is securely attached and prevents damage.
2

Transfer Case to Transmission Bolts

M12 x 1.25
Torque Specification
37 ft-lbs (50 N·m)
Important Notes
Proper torque ensures the transfer case is securely attached and prevents damage. (Estimated value)

Drive Axles and Half Shafts

1

Drive Axle/Half Shaft Bolts

M14 x 1.5
Torque Specification
59 ft-lbs (80 N·m)
Important Notes
Proper torque ensures the axles or half shafts are securely attached and prevents damage.
2

CV Joint/Axle Nut

M16 x 1.5
Torque Specification
148 ft-lbs (200 N·m)
Important Notes
Proper torque ensures the CV joint is securely attached and prevents damage.

Propeller/Drive Shaft

1

Propeller/Drive Shaft Bolts

M14 x 1.5
Torque Specification
74 ft-lbs (100 N·m)
Important Notes
Proper torque ensures the shaft is securely attached and prevents damage.

Differential and Axle Housing

1

Differential Cover Bolts

M12 x 1.25
Torque Specification
37 ft-lbs (50 N·m)
Important Notes
Proper torque ensures the cover is securely attached and prevents damage. (Estimated value)

Electrical

Torque specifications for Electrical

Battery System

1

Battery Terminal Nuts

M10 x 1.5
Torque Specification
7 ft-lbs (10 N·m)

Starter Motor System

1

Starter Motor Mounting Bolts

M12 x 1.75
Torque Specification
37 ft-lbs (50 N·m)

Alternator System

1

Alternator Mounting Bolts

M12 x 1.75
Torque Specification
37 ft-lbs (50 N·m)

Ignition System

1

Ignition Coil Bracket Bolts

M8 x 1.25
Torque Specification
11 ft-lbs (15 N·m)
Important Notes
Estimated value based on general industry standards.

Fuel System

1

Fuel Pump Electrical Connector Bolts

M6 x 1.0
Torque Specification
6 ft-lbs (8 N·m)
Important Notes
Estimated value based on general industry standards.

Air Conditioning System

1

A/C Compressor Electrical Connector Bolts

M6 x 1.0
Torque Specification
6 ft-lbs (8 N·m)
Important Notes
Estimated value based on general industry standards.

Power Steering System

1

Power Steering Pump Electrical Connector Bolts

M6 x 1.0
Torque Specification
6 ft-lbs (8 N·m)
Important Notes
Estimated value based on general industry standards.

Emissions Sensors

Torque specifications for Emissions_sensors

Exhaust Manifold Headers

1

Exhaust Manifold/Headers Bolts

M10 x 1.25
Torque Specification
26 ft-lbs (35 N·m)
Important Notes
Ensure proper sequence to avoid warping the manifold.
2

Exhaust Manifold/Headers to Cylinder Head Bolts

M8 x 1.25
Torque Specification
22 ft-lbs (30 N·m)
Important Notes
Ensure proper sequence to avoid warping the manifold.

Exhaust Pipe Connections

1

Exhaust Pipe to Exhaust Manifold/Headers Bolts

M10 x 1.25
Torque Specification
26 ft-lbs (35 N·m)
Important Notes
Ensure gasket is properly seated before tightening.
2

Downpipe to Catalytic Converter Bolts

M10 x 1.25
Torque Specification
26 ft-lbs (35 N·m)
Important Notes
Ensure gasket is properly seated before tightening.

Catalytic Converter

1

Catalytic Converter to Exhaust Pipe Bolts

M8 x 1.25
Torque Specification
22 ft-lbs (30 N·m)
Important Notes
Ensure gasket is properly seated before tightening.
2

Catalytic Converter Heat Shield Bolts

M6 x 1.0
Torque Specification
7 ft-lbs (10 N·m)
Important Notes
Ensure heat shield is properly aligned before tightening.

Emissions Control Components

1

EGR Valve Bolts

M6 x 1.0
Torque Specification
7 ft-lbs (10 N·m)
Important Notes
Ensure gasket is properly seated before tightening.
2

Secondary Air Injection System Bolts

M6 x 1.0
Torque Specification
7 ft-lbs (10 N·m)
Important Notes
Ensure proper alignment of the air injection system.

Oxygen Sensors

1

Oxygen Sensor (O2 Sensor) Mounting Bolts

M8 x 1.25
Torque Specification
22 ft-lbs (30 N·m)
Important Notes
Ensure the sensor is properly seated before tightening.

Exhaust

Torque specifications for Exhaust

Exhaust Manifold Headers

1

Exhaust Manifold/Headers to Cylinder Head Bolts

M10 x 1.25
Torque Specification
26 ft-lbs (35 N·m)
Important Notes
Ensure bolts are tightened in a crisscross pattern to evenly distribute pressure.
2

Exhaust Pipe to Exhaust Manifold/Headers Bolts

M10 x 1.25
Torque Specification
26 ft-lbs (35 N·m)
Important Notes
Ensure a proper seal to prevent exhaust leaks at this junction.

Catalytic Converter

1

Catalytic Converter to Exhaust Pipe Bolts

M10 x 1.25
Torque Specification
22 ft-lbs (30 N·m)
Important Notes
Ensure a proper seal to prevent exhaust leaks and maintain emissions compliance.

Muffler

1

Muffler to Exhaust Pipe Bolts

M10 x 1.25
Torque Specification
26 ft-lbs (35 N·m)
Important Notes
Ensure a proper seal to prevent exhaust leaks and excessive noise.

Heat Shield

1

Exhaust Heat Shield Bolts

M6 x 1.0
Torque Specification
7 ft-lbs (10 N·m)
Important Notes
Estimated value based on typical heat shield bolt sizes. Avoid over-tightening to prevent damage.

Exhaust Hanger

1

Exhaust Hanger Bolts

M8 x 1.25
Torque Specification
15 ft-lbs (20 N·m)
Important Notes
Estimated value based on typical hanger bolt sizes. Ensure hangers are securely attached without over-tightening.

Oxygen Sensor

1

Oxygen Sensor (O2 Sensor) Mounting Bolts

M12 x 1.25
Torque Specification
22 ft-lbs (30 N·m)
Important Notes
Ensure a proper seal to prevent exhaust leaks and maintain accurate sensor readings.

Exhaust Flange

1

Exhaust Flange Bolts

M10 x 1.25
Torque Specification
26 ft-lbs (35 N·m)
Important Notes
Ensure a proper seal to prevent exhaust leaks at flange connections.

Fuel

Torque specifications for Fuel

Fuel Rail System

1

Fuel Rail Bolts

M6 x 1.0
Torque Specification
7 ft-lbs (10 N·m)
Important Notes
Ensure the fuel rail is properly aligned before tightening.
2

Fuel Injector Bolts

M6 x 1.0
Torque Specification
7 ft-lbs (10 N·m)
Important Notes
Ensure injectors are seated properly before tightening.

Fuel Pump System

1

Fuel Pump Mounting Bolts

M6 x 1.0
Torque Specification
7 ft-lbs (10 N·m)
Important Notes
Ensure the fuel pump is properly aligned before tightening.
2

High-Pressure Fuel Pump Mounting Bolts

M8 x 1.25
Torque Specification
15 ft-lbs (20 N·m)
Important Notes
Estimated value based on similar high-pressure pump applications.

Fuel Tank System

1

Fuel Tank Strap Bolts

M10 x 1.5
Torque Specification
22 ft-lbs (30 N·m)
Important Notes
Ensure the fuel tank is properly supported before tightening.
2

Fuel Filler Neck Bolts

M12 x 1.75
Torque Specification
37 ft-lbs (50 N·m)
Important Notes
Ensure the filler neck is properly aligned before tightening.
3

Fuel Tank Sender Unit Bolts

M6 x 1.0
Torque Specification
7 ft-lbs (10 N·m)
Important Notes
Ensure the sender unit is properly seated before tightening.

Fuel Filter System

1

Fuel Filter Bolt/Nut

M8 x 1.25
Torque Specification
22 ft-lbs (30 N·m)
Important Notes
Ensure the filter is properly aligned before tightening.

Fuel Line System

1

Fuel Line Flange Bolts

M8 x 1.25
Torque Specification
15 ft-lbs (20 N·m)
Important Notes
Estimated value based on similar flange applications.

Evaporative Emissions System

1

Fuel Vent Valve Bolts

M6 x 1.0
Torque Specification
7 ft-lbs (10 N·m)
Important Notes
Ensure the vent valve is properly seated before tightening.

Hvac

Torque specifications for Hvac

Ac Compressor

1

A/C Compressor Mounting Bolts

M10 x 1.25
Torque Specification
37 ft-lbs (50 N·m)
Important Notes
Ensure bolts are tightened in a crisscross pattern to evenly distribute load.

Refrigerant Lines

1

A/C Line Fittings

M8 x 1.0
Torque Specification
15 ft-lbs (20 N·m)
Important Notes
Use a backup wrench to avoid twisting the refrigerant lines during tightening.

Evaporator

1

Evaporator Housing Bolts

M6 x 1.0
Torque Specification
7 ft-lbs (10 N·m)
Important Notes
Estimated value based on typical evaporator housing bolt sizes.

Blower Motor

1

Blower Motor Mounting Bolts

M6 x 1.0
Torque Specification
7 ft-lbs (10 N·m)
Important Notes
Estimated value based on typical blower motor bolt sizes.

Heater Core

1

Heater Core Inlet/Outlet Fittings

M8 x 1.0
Torque Specification
15 ft-lbs (20 N·m)
Important Notes
Estimated value based on typical heater core fitting sizes.

Condenser

1

Condenser Mounting Bolts

M8 x 1.0
Torque Specification
15 ft-lbs (20 N·m)
Important Notes
Estimated value based on typical condenser mounting bolt sizes.

Control Valve

1

HVAC Control Valve Bolts

M6 x 1.0
Torque Specification
7 ft-lbs (10 N·m)
Important Notes
Estimated value based on typical control valve bolt sizes.

Suspension

Torque specifications for Suspension

Front Suspension

1

Strut/Shock Absorber Mounting Bolts

M14 x 1.5
Torque Specification
85 ft-lbs (115 N·m)
2

Control Arm Bolts

M14 x 1.5
Torque Specification
85 ft-lbs (115 N·m)
3

Ball Joint Nut

M16 x 1.5
Torque Specification
37 ft-lbs (50 N·m)
4

Tie Rod End Nut

M16 x 1.5
Torque Specification
37 ft-lbs (50 N·m)
5

Sway Bar Link Nut

M16 x 1.5
Torque Specification
37 ft-lbs (50 N·m)
6

Upper Control Arm Bushing Bolts

M12 x 1.25
Torque Specification
45 ft-lbs (61 N·m)
Important Notes
Estimated value. Consult vehicle's repair manual or manufacturer's specifications for accurate torque values.
7

Lower Control Arm Bolts

M14 x 1.5
Torque Specification
75 ft-lbs (102 N·m)
Important Notes
Estimated value. Consult vehicle's repair manual or manufacturer's specifications for accurate torque values.
8

Stabilizer Bar Mounting Bolts

M12 x 1.25
Torque Specification
45 ft-lbs (61 N·m)
Important Notes
Estimated value. Consult vehicle's repair manual or manufacturer's specifications for accurate torque values.
9

Coil Spring Mounting Bolts

M12 x 1.25
Torque Specification
45 ft-lbs (61 N·m)
Important Notes
Estimated value. Consult vehicle's repair manual or manufacturer's specifications for accurate torque values.

Steering System

1

Steering Gear/Rack Bolts

M14 x 1.5
Torque Specification
85 ft-lbs (115 N·m)

Troubleshooting Guide

Common issues, diagnostic steps, and prevention guidelines

Common Issues

Bolt stretching, stripped threads, uneven torque patterns

Loose Components

Symptoms:
  • Rattling or vibration noises
  • Visible movement in components
  • Uneven panel gaps
Solutions:
  • Clean threads and mounting surfaces
  • Replace damaged fasteners
  • Apply proper torque in sequence
  • Use thread locker if specified

Stripped Fasteners

Symptoms:
  • Unable to achieve proper torque
  • Fastener spins freely
  • Visible thread damage
Solutions:
  • Use thread repair kit if appropriate
  • Install thread insert (HeliCoil)
  • Replace component if threaded hole is damaged
  • Upgrade to higher grade fastener if recommended

Overtightened Components

Symptoms:
  • Cracked or deformed parts
  • Broken fasteners
  • Compressed gaskets or seals
Solutions:
  • Replace damaged components
  • Use new fasteners
  • Follow proper torque sequence
  • Verify correct torque specifications

Diagnostic Steps

Visual inspection, torque verification, thread assessment

1

Visual Inspection

Inspect the affected area for any visible signs of damage or wear

  • Check for cracks or deformation
  • Look for signs of excessive wear
  • Verify proper fastener installation
2

Torque Verification

Verify the torque applied to the fasteners

  • Check the torque wrench calibration
  • Verify the torque specification
  • Compare the applied torque to the specification
3

Thread Assessment

Assess the condition of the threads

  • Check for signs of thread damage
  • Verify the thread type and size
  • Check for proper thread engagement

Prevention Guidelines

Best practices, maintenance tips, tool care

Best Practices

  • Always follow the recommended torque specification
  • Use the correct type and size of fasteners
  • Verify the torque wrench calibration regularly

Maintenance Tips

  • Regularly inspect the affected area for signs of wear or damage
  • Replace damaged or worn-out components promptly
  • Keep the work area clean and organized

Tool Care

  • Regularly clean and maintain the torque wrench
  • Store the torque wrench in a dry and secure location
  • Verify the torque wrench calibration before each use

Frequently Asked Questions

Find answers to common questions about torque specifications

Q1

What IS the recommended torque for cylinder head bolts on a 2012 Mercedes SL?

Cylinder head bolt torque for a 2012 Mercedes SL IS 60 ft-lbs (81 Nm) in three stages: 20 ft-lbs, 40 ft-lbs, and 60 ft-lbs.

Q2

What IS the proper sequence for tightening lug nuts on a Mercedes SL?

Tighten lug nuts in a star pattern to 90 ft-lbs (122 Nm).

Q3

What tools are recommended for accurate torque measurement?

Use a calibrated torque wrench that meets or exceeds industry standards. Ensure the torque wrench IS set to the correct torque value before use.

Q4

What are the consequences of over-tightening a bolt?

Over-tightening can cause the bolt to stretch or break, damaging threads or components. It can also lead to premature wear or failure.

Q5

What precautions should be taken when torquing bolts near carbon fiber components?

Use extreme caution when torquing near carbon fiber components. Apply only the necessary torque to avoid damaging the material. Consult the manufacturer's specifications.

Q6

How often should torque specifications be reviewed and updated?

Torque specifications may change with vehicle design or component updates. Always refer to the latest Mercedes technical documentation or service manual for the most up-to-date torque values.

Environmental Considerations

Temperature, humidity, and seasonal effects on torque specifications

Temperature Effects

Includes: High Heat, Cold Weather, Thermal Cycling

Temperature can significantly impact torque values and fastener behavior

Cold Weather

Effects:
  • Increased material brittleness
  • Higher torque required due to thread contraction
  • Reduced thread lubricant effectiveness
Recommendations:
  • Allow components to warm to room temperature when possible
  • Consider using winter-grade thread lubricants
  • Check torque values more frequently during winter months

Hot Weather

Effects:
  • Thermal expansion of components
  • Decreased friction in threads
  • Accelerated lubricant breakdown
Recommendations:
  • Check torque when components are at normal operating temperature
  • Use temperature-resistant thread lockers
  • Consider re-torquing after heat cycles

Humidity and Corrosion

Covers: Rust Prevention, Salt Exposure, Moisture Control

Moisture and corrosion can affect fastener integrity and torque values

High Humidity

Effects:
  • Accelerated corrosion formation
  • Reduced friction coefficient
  • Potential thread seizing
Prevention:
  • Use corrosion-resistant fasteners
  • Apply appropriate anti-seize compounds
  • Maintain proper protective coatings

Salt Exposure

Effects:
  • Rapid corrosion development
  • Thread damage
  • Seized fasteners
Prevention:
  • Regular underbody washing
  • Use of sacrificial anodes where appropriate
  • Application of protective coatings

Seasonal Maintenance

Spring, Summer, Fall, and Winter maintenance schedules

Spring

  • Inspect for winter damage
  • Clean and protect exposed fasteners
  • Check torque on critical components

Summer

  • Monitor heat-affected components
  • Check expansion-related loosening
  • Inspect cooling system mounts

Fall

  • Prepare for winter conditions
  • Apply corrosion protection
  • Verify all fasteners are properly torqued

Winter

  • More frequent inspection of critical fasteners
  • Check for salt damage
  • Monitor suspension component torque

Related Resources

Tools, service procedures, and technical bulletins

Recommended Tools

Digital Torque Wrench (10-100 Nm)

For tightening fasteners to precise torque specifications, preventing damage and ensuring proper assembly. This range IS suitable for many applications on the sl.

  • Digital display for accurate readings
  • Audible alarm when target torque IS reached
  • Multiple units (Nm, ft-lb, in-lb)
  • Reversible ratcheting mechanism
Learn more
Service Procedures
Technical Service Bulletins

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Technical Information
  • All specifications, including torque values, fluid capacities, and maintenance procedures, should be verified against your vehicle's factory service manual.
  • Vehicle specifications and procedures may vary by model year, trim level, and region.
  • Always follow the manufacturer's recommended procedures and safety precautions.
  • Working on vehicles can be dangerous. Always take proper safety precautions and use appropriate safety equipment.
  • If you're unsure about any procedure, consult a qualified professional mechanic.
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About the Author

Expert automotive knowledge and experience

Alan Montanye - Automotive Technical Specialist
ASE

Alan Montanye

Automotive Technical Specialist

ASE Master Certified Technician with over a decade of hands-on experience in automotive repair and diagnostics.

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