Mercedes-Benz Vehicle Models Mercedes SLK 1996-2004 Torque Specifications
Mercedes-Benz Vehicle Models Mercedes SLK 1996-2004

Mercedes-Benz Vehicle Models Mercedes SLK 1996-2004 Torque Specifications

Complete Mercedes-Benz Vehicle Models Mercedes SLK 1996-2004 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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Search by component name, bolt size, or description

Torque Calculator

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2.0l I4 Engine

Torque specifications for 2.0L-I4 Engine

Cylinder Head

1

Cylinder Head Bolts

M10 x 1.5
Torque Specification
1. 18 ft-lbs (24 N·m) 2. 23 ft-lbs (31 N·m)
Important Notes
Follow the manufacturer's specified torque sequence to ensure even clamping force.
2

Valve Cover Bolts

M6 x 1.0
Torque Specification
8 ft-lbs (11 N·m)
Important Notes
Ensure the valve cover gasket is properly seated before tightening.

Crankshaft And Bearings

1

Main Bearing Bolts

M12 x 1.75
Torque Specification
73 ft-lbs (99 N·m)
Important Notes
Ensure the crankshaft is properly aligned before tightening.
2

Connecting Rod Nuts

M8 x 1.25
Torque Specification
33 ft-lbs (45 N·m)
Important Notes
Ensure the connecting rod bearings are properly seated.

Timing System

1

Camshaft Sprocket Bolt

M10 x 1.5
Torque Specification
53 ft-lbs (72 N·m)
Important Notes
Ensure the timing marks are aligned before tightening.
2

Timing Belt/Chain Tensioner Bolt

M8 x 1.25
Torque Specification
19 ft-lbs (26 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
13 ft-lbs (18 N·m)
Important Notes
Ensure the intake manifold gasket is properly seated.
2

Exhaust Manifold Bolts

M10 x 1.5
Torque Specification
21 ft-lbs (28 N·m)
Important Notes
Ensure the exhaust manifold gasket is properly seated.

Lubrication System

1

Oil Pan Bolts

M6 x 1.0
Torque Specification
7 ft-lbs (9 N·m)
Important Notes
Ensure the oil pan gasket is properly seated.
2

Oil Drain Plug

M14 x 1.5
Torque Specification
28 ft-lbs (38 N·m)
Important Notes
Replace the crush washer to prevent leaks.

2.3l I4 Engine

Torque specifications for 2.3L-I4 Engine

Cylinder Head and Valve Train

1

Cylinder Head Bolts

M12 x 1.5
Torque Specification
20 ft-lbs (27 N·m)
Important Notes
Estimated value, consult engine manual for confirmation.
2

Valve Cover Bolts

M8 x 1.25
Torque Specification
8 ft-lbs (11 N·m)
3

Rocker Arms/Shafts Bolts

M10 x 1.5
Torque Specification
17 ft-lbs (23 N·m)

Engine Block and Crankshaft

1

Main Bearing Bolts

M14 x 2.0
Torque Specification
72 ft-lbs (98 N·m)
2

Connecting Rod Nuts

M12 x 1.75
Torque Specification
32 ft-lbs (43 N·m)
3

Crankshaft Pulley/Harmonic Balancer Bolt

M16 x 2.0
Torque Specification
137 ft-lbs (186 N·m)

Timing and Accessory Components

1

Timing Belt/Chain Tensioner Bolt

M10 x 1.5
Torque Specification
18 ft-lbs (24 N·m)
2

Water Pump Bolts

M12 x 1.75
Torque Specification
18 ft-lbs (24 N·m)

Intake and Exhaust Components

1

Intake Manifold Bolts

M10 x 1.5
Torque Specification
12 ft-lbs (16 N·m)
2

Exhaust Manifold/Headers Bolts

M12 x 1.75
Torque Specification
20 ft-lbs (27 N·m)

Engine Mounting and Transmission Components

1

Engine Mounting Bolts

M14 x 2.0
Torque Specification
32 ft-lbs (43 N·m)
Important Notes
Estimated value, consult engine manual for confirmation.
2

Engine Block to Transmission Mounting Bolts

M12 x 1.75
Torque Specification
42 ft-lbs (57 N·m)
Important Notes
Estimated value, consult engine manual for confirmation.

3.2l Engine

Torque specifications for 3.2L Engine

Cylinder Head

1

Cylinder Head Bolts

M10 x 1.5
Torque Specification
1. 18 ft-lbs (24 N·m) 2. 90°
Important Notes
Follow the manufacturer's specified torque sequence to avoid warping the cylinder head.
2

Valve Cover Bolts

M6 x 1.0
Torque Specification
8 ft-lbs (11 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
73 ft-lbs (99 N·m)
Important Notes
Follow the specified torque sequence to ensure proper crankshaft alignment.
2

Connecting Rod Nuts

M8 x 1.25
Torque Specification
33 ft-lbs (45 N·m)
Important Notes
Ensure the connecting rod bearings are properly installed before tightening.

Timing System

1

Camshaft Sprocket Bolt

M10 x 1.25
Torque Specification
53 ft-lbs (72 N·m)
Important Notes
Ensure the timing marks are aligned before tightening.
2

Timing Belt/Chain Tensioner Bolt

M8 x 1.25
Torque Specification
19 ft-lbs (26 N·m)
Important Notes
Ensure the tensioner is properly aligned before tightening.

Intake And Exhaust

1

Intake Manifold Bolts

M8 x 1.25
Torque Specification
13 ft-lbs (18 N·m)
Important Notes
Follow the specified torque sequence to prevent warping of the intake manifold.
2

Exhaust Manifold Bolts

M8 x 1.25
Torque Specification
21 ft-lbs (28 N·m)
Important Notes
Ensure the exhaust manifold gasket is properly seated before tightening.

Oil System

1

Oil Pan Bolts

M6 x 1.0
Torque Specification
7 ft-lbs (9 N·m)
Important Notes
Ensure the oil pan gasket is properly seated before tightening.
2

Oil Drain Plug Bolt

M12 x 1.5
Torque Specification
28 ft-lbs (38 N·m)
Important Notes
Replace the crush washer with a new one to ensure a proper seal.

3.2l V6 Engine

Torque specifications for 3.2L-V6 Engine

Cylinder Head

1

Cylinder Head Bolts

M10 x 1.5
Torque Specification
1. 18 ft-lbs (24 N·m) 2. 90°
Important Notes
Follow the manufacturer's specified torque sequence to avoid warping the cylinder head.
2

Valve Cover Bolts

M6 x 1.0
Torque Specification
8 ft-lbs (11 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
73 ft-lbs (99 N·m)
Important Notes
Follow the specified torque sequence to ensure proper crankshaft alignment.
2

Connecting Rod Nuts

M8 x 1.25
Torque Specification
33 ft-lbs (45 N·m)
Important Notes
Ensure the connecting rod bearings are properly installed before tightening.

Timing System

1

Camshaft Sprocket Bolt

M10 x 1.25
Torque Specification
53 ft-lbs (72 N·m)
Important Notes
Ensure the timing marks are aligned before tightening.
2

Timing Belt/Chain Tensioner Bolt

M8 x 1.25
Torque Specification
19 ft-lbs (26 N·m)
Important Notes
Ensure the tensioner is properly aligned before tightening.

Intake And Exhaust

1

Intake Manifold Bolts

M8 x 1.25
Torque Specification
13 ft-lbs (18 N·m)
Important Notes
Follow the specified torque sequence to prevent warping of the intake manifold.
2

Exhaust Manifold Bolts

M8 x 1.25
Torque Specification
21 ft-lbs (28 N·m)
Important Notes
Ensure the exhaust manifold gasket is properly seated before tightening.

Oil System

1

Oil Pan Bolts

M6 x 1.0
Torque Specification
7 ft-lbs (9 N·m)
Important Notes
Ensure the oil pan gasket is properly seated before tightening.
2

Oil Drain Plug Bolt

M12 x 1.5
Torque Specification
28 ft-lbs (38 N·m)
Important Notes
Replace the crush washer with a new one to ensure a proper seal.

5g Tronic Transmission

Torque specifications for 5g Tronic Transmission

Transmission Mounting

1

Transmission Mounting Bolts

M14 x 1.5
Torque Specification
37.5 ft-lbs (50.9 N·m)
Important Notes
Estimated value based on similar components and bolt sizes.

Transmission Oil Pan

1

Transmission Oil Pan Bolts

M10 x 1.25
Torque Specification
7 ft-lbs (9.5 N·m)

Transmission Drain and Fill

1

Transmission Drain and Fill Plugs

M12 x 1.5
Torque Specification
27.5 ft-lbs (37.3 N·m)

Transmission Bellhousing

1

Transmission Bellhousing Bolts

M16 x 1.5
Torque Specification
42.5 ft-lbs (57.6 N·m)
Important Notes
Estimated value based on general industry standards.

Transmission Valve Body

1

Transmission Valve Body Bolts

M10 x 1.25
Torque Specification
11 ft-lbs (14.9 N·m)
Important Notes
Estimated value based on general industry standards.

Transmission Solenoid Pack

1

Transmission Solenoid Pack Bolts

M8 x 1.25
Torque Specification
9 ft-lbs (12.2 N·m)
Important Notes
Estimated value based on general industry standards.

Transmission Filter

1

Transmission Filter Bolts

M10 x 1.25
Torque Specification
11 ft-lbs (14.9 N·m)
Important Notes
Estimated value based on general industry standards.

Body

Torque specifications for Body

Fuel System

1

Fuel Tank Strap Bolts

M8 x 1.25
Torque Specification
18 ft-lbs (24 N·m)
Important Notes
Ensure straps are evenly tensioned to avoid fuel tank misalignment.
2

Fuel Filler Neck Bolts

M6 x 1.0
Torque Specification
7 ft-lbs (9 N·m)
Important Notes
Avoid over-tightening to prevent damage to the filler neck or gasket.

Electrical System

1

Battery Terminal Nuts

M6 x 1.0
Torque Specification
6 ft-lbs (8 N·m)
Important Notes
Ensure terminals are clean and free of corrosion before tightening.

Body Panels

1

Door Hinge Bolts

M10 x 1.5
Torque Specification
20 ft-lbs (27 N·m)
Important Notes
Ensure door alignment is checked after tightening.
2

Hood Hinge Bolts

M8 x 1.25
Torque Specification
18 ft-lbs (24 N·m)
Important Notes
Check hood alignment after tightening.
3

Trunk Lid Hinge Bolts

M8 x 1.25
Torque Specification
18 ft-lbs (24 N·m)
Important Notes
Check trunk lid alignment after tightening.
4

Fender Bolts

M6 x 1.0
Torque Specification
12 ft-lbs (16 N·m)
Important Notes
Ensure fender alignment is checked after tightening.

Seating System

1

Seat Mounting Bolts

M10 x 1.5
Torque Specification
38 ft-lbs (51 N·m)
Important Notes
Ensure seats are securely mounted for passenger safety.

Exterior Components

1

Bumper Mounting Bolts

M8 x 1.25
Torque Specification
20 ft-lbs (27 N·m)
Important Notes
Ensure bumper alignment is checked after tightening.
2

Roof Panel Bolts

M6 x 1.0
Torque Specification
12 ft-lbs (16 N·m)
Important Notes
Ensure roof panel alignment is checked after tightening.

Brakes

Torque specifications for Brakes

Brake Caliper System

1

Brake Caliper Bolts

M12 x 1.5
Torque Specification
77.5 ft-lbs (105 N·m)
Important Notes
Ensures the caliper remains securely attached to the mounting bracket.
2

Brake Caliper Mounting Bracket Bolts

M14 x 1.5
Torque Specification
105 ft-lbs (142.5 N·m)
Important Notes
Ensures the mounting bracket remains firmly attached to the steering knuckle or axle.
3

Brake Hose Banjo Bolt

M10 x 1.0
Torque Specification
18 ft-lbs (24.5 N·m)
Important Notes
Ensures a leak-free connection between the brake hose and caliper/brake line. Estimated value.

Brake Rotor Wheel System

1

Brake Disc/Drum Retaining Bolts

M10 x 1.25
Torque Specification
62.5 ft-lbs (84.5 N·m)
Important Notes
Ensures the rotor/drum remains securely attached to the hub.
2

Wheel Lug Nuts

M12 x 1.5
Torque Specification
85 ft-lbs (115 N·m)
Important Notes
Ensures the wheel remains securely attached to the hub.

Brake Hydraulic System

1

Brake Master Cylinder Mounting Bolts

M8 x 1.25
Torque Specification
17.5 ft-lbs (23.5 N·m)
Important Notes
Ensures the master cylinder remains securely attached to the brake booster. Estimated value.
2

Brake Booster Mounting Bolts

M8 x 1.25
Torque Specification
17.5 ft-lbs (23.5 N·m)
Important Notes
Ensures the brake booster remains firmly attached to the firewall. Estimated value.
3

Brake Pedal Pivot Bolt

M10 x 1.25
Torque Specification
20 ft-lbs (27 N·m)
Important Notes
Ensures the brake pedal operates smoothly and maintains proper engagement. Estimated value.

Drivetrain

Torque specifications for Drivetrain

Engine Block and Crankshaft

1

Flywheel Bolts

M12 x 1.5
Torque Specification
67.5 ft-lbs (91.5 N·m)
Important Notes
Estimated average value between 65-70 ft-lbs (88-95 nm)
2

Main Bearing Bolts

M14 x 1.5
Torque Specification
72.5 ft-lbs (98.5 N·m)
Important Notes
Estimated average value between 70-75 ft-lbs (95-102 nm)

Crankshaft and Connecting Rods

1

Connecting Rod Nuts

M10 x 1.5
Torque Specification
32.5 ft-lbs (44 N·m)
Important Notes
Estimated average value between 30-35 ft-lbs (41-47 nm)
2

Crankshaft Pulley/Harmonic Balancer Bolt

M16 x 1.5
Torque Specification
137.5 ft-lbs (186 N·m)
Important Notes
Estimated average value between 134-141 ft-lbs (181-191 nm)

Transmission and Drivetrain

1

Transmission Mounting Bolts

M12 x 1.5
Torque Specification
37.5 ft-lbs (50.5 N·m)
Important Notes
Estimated average value between 35-40 ft-lbs (47-54 nm)
2

Drive Axle/Half Shaft Bolts

M14 x 1.5
Torque Specification
95 ft-lbs (129 N·m)
Important Notes
Estimated average value between 90-100 ft-lbs (122-136 nm)
3

CV Joint/Axle Nut

M18 x 1.5
Torque Specification
210 ft-lbs (284 N·m)
Important Notes
Estimated average value between 200-220 ft-lbs (271-298 nm)

Differential and Transfer Case

1

Differential Cover Bolts

M10 x 1.5
Torque Specification
35 ft-lbs (47.5 N·m)
Important Notes
Estimated average value between 30-40 ft-lbs (41-54 nm)
2

Transfer Case Bolts

M12 x 1.5
Torque Specification
45 ft-lbs (61 N·m)
Important Notes
Estimated average value between 40-50 ft-lbs (54-68 nm)

Engine Block to Transmission Bellhousing

1

Engine Block to Transmission Bellhousing Bolts

M14 x 1.5
Torque Specification
45 ft-lbs (61 N·m)
Important Notes
Estimated average value between 40-50 ft-lbs (54-68 nm)

Electrical

Torque specifications for Electrical

Ignition System

1

Ignition Coil Bolt

M8 x 1.25
Torque Specification
7 ft-lbs (9 N·m)
Important Notes
Proper torque ensures a secure connection and prevents damage to the coil or surrounding components.
2

Spark Plug Wire Boot Clamp Bolt

M6 x 1.0
Torque Specification
12 ft-lbs (16 N·m)
Important Notes
Estimated value based on general industry standards. Proper torque ensures a secure connection between the spark plug wire and the spark plug.
3

Ignition Module Mounting Bolts

M10 x 1.5
Torque Specification
12 ft-lbs (16 N·m)
Important Notes
Estimated value based on general industry standards. Proper torque ensures a secure connection between the ignition module and the engine.

Starting System

1

Starter Motor Mounting Bolts

M12 x 1.75
Torque Specification
27 ft-lbs (37 N·m)
Important Notes
Proper torque ensures a secure connection and prevents damage to the starter motor or surrounding components.

Charging System

1

Alternator Mounting Bolts

M10 x 1.5
Torque Specification
17 ft-lbs (23 N·m)
Important Notes
Proper torque ensures a secure connection and prevents damage to the alternator or surrounding components.

Battery and Electrical System

1

Battery Terminal Nuts

M8 x 1.25
Torque Specification
6 ft-lbs (8 N·m)
Important Notes
Proper torque ensures a secure connection and prevents damage to the terminals or surrounding components.
2

Fuel Injector Electrical Connector Bolt

M6 x 1.0
Torque Specification
6 ft-lbs (8 N·m)
Important Notes
Estimated value based on general industry standards. Proper torque ensures a secure connection between the fuel injector and the electrical system.

Emissions Sensors

Torque specifications for Emissions_sensors

Exhaust Manifold Headers

1

Exhaust Manifold/Headers Bolts

M8 x 1.25
Torque Specification
20 ft-lbs (27 N·m)
Important Notes
Ensure bolts are tightened in a crisscross pattern to evenly distribute pressure.
2

Exhaust Manifold/Headers to Cylinder Head Bolts

M8 x 1.25
Torque Specification
20 ft-lbs (27 N·m)
Important Notes
Ensure bolts are tightened in a crisscross pattern to evenly distribute pressure.

Exhaust Pipe Connections

1

Exhaust Pipe to Exhaust Manifold/Headers Bolts

M8 x 1.25
Torque Specification
20 ft-lbs (27 N·m)
Important Notes
Ensure gasket is properly seated before tightening.
2

Catalytic Converter to Exhaust Pipe Bolts

M8 x 1.25
Torque Specification
20 ft-lbs (27 N·m)
Important Notes
Ensure gasket is properly seated before tightening.

Emission Control Components

1

EGR Valve Bolts

M6 x 1.0
Torque Specification
8 ft-lbs (11 N·m)
Important Notes
Ensure gasket is properly seated before tightening.
2

Oxygen Sensor (Lambda Sensor) Mounting

M18 x 1.5
Torque Specification
35 ft-lbs (47 N·m)
Important Notes
Estimated value based on similar components. Ensure sensor is properly seated before tightening.
3

Exhaust Gas Temperature Sensor Mounting

M12 x 1.25
Torque Specification
18 ft-lbs (24 N·m)
Important Notes
Estimated value based on similar components. Ensure sensor is properly seated before tightening.
4

Secondary Air Injection System Bolts

M6 x 1.0
Torque Specification
8 ft-lbs (11 N·m)
Important Notes
Ensure gasket is properly seated before tightening.

Heat Shields

1

Catalytic Converter Heat Shield Bolts

M6 x 1.0
Torque Specification
8 ft-lbs (11 N·m)
Important Notes
Ensure heat shield is properly aligned before tightening.

Exhaust

Torque specifications for Exhaust

Exhaust Manifold Headers

1

Exhaust Manifold/Headers to Cylinder Head Bolts

M10 x 1.5
Torque Specification
20 ft-lbs (27 N·m)
Important Notes
Estimated bolt size based on typical exhaust manifold applications.
2

Exhaust Pipe to Exhaust Manifold/Headers Bolts

M10 x 1.5
Torque Specification
20 ft-lbs (27 N·m)
Important Notes
Estimated bolt size based on typical exhaust pipe connections.

Catalytic Converter

1

Catalytic Converter to Exhaust Pipe Bolts

M10 x 1.5
Torque Specification
20 ft-lbs (27 N·m)
Important Notes
Estimated bolt size based on typical catalytic converter applications.

Muffler

1

Muffler to Exhaust Pipe Bolts

M10 x 1.5
Torque Specification
20 ft-lbs (27 N·m)
Important Notes
Estimated bolt size based on typical muffler applications.

Exhaust Hanger

1

Exhaust Hanger Bolts

M8 x 1.25
Torque Specification
17 ft-lbs (23 N·m)
Important Notes
Estimated bolt size based on typical exhaust hanger applications.

Oxygen Sensor

1

Oxygen Sensor Mounting Bolts

M12 x 1.5
Torque Specification
27 ft-lbs (37 N·m)
Important Notes
Estimated bolt size based on typical oxygen sensor applications.

Exhaust Heat Shield

1

Exhaust Heat Shield Bolts

M6 x 1.0
Torque Specification
8 ft-lbs (11 N·m)
Important Notes
Estimated bolt size based on typical heat shield applications.

Exhaust Flange

1

Exhaust Flange Bolts (Downpipe to Midpipe Connection)

M10 x 1.5
Torque Specification
20 ft-lbs (27 N·m)
Important Notes
Estimated bolt size based on typical exhaust flange applications.

Fuel

Torque specifications for Fuel

Intake Manifold

1

Throttle Body Bolts

M8 x 1.25
Torque Specification
7 ft-lbs (9 N·m)
Important Notes
Estimated value based on similar components.
2

Intake Manifold Bolts

M10 x 1.5
Torque Specification
12 ft-lbs (16 N·m)

Fuel Rail and Injectors

1

Fuel Rail Bolts

M8 x 1.25
Torque Specification
8 ft-lbs (11 N·m)
2

Fuel Injector Bolts

M8 x 1.25
Torque Specification
8 ft-lbs (11 N·m)
3

Fuel Injector Hold-Down Clamp Bolts

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

Fuel Pump and Tank

1

Fuel Pump Mounting Bolts

M12 x 1.75
Torque Specification
18 ft-lbs (24 N·m)
2

Fuel Tank Strap Bolts

M12 x 1.75
Torque Specification
17 ft-lbs (23 N·m)
3

Fuel Filler Neck Bolts

M8 x 1.25
Torque Specification
7 ft-lbs (9 N·m)

Fuel Filter and Pressure Regulator

1

Fuel Filter Bolt/Nut

M12 x 1.75
Torque Specification
17 ft-lbs (23 N·m)
2

Fuel Pressure Regulator Mounting Bolts

M8 x 1.25
Torque Specification
12 ft-lbs (16 N·m)
Important Notes
Estimated value based on similar components.

Fuel Pump Electrical Connector

1

Fuel Pump Electrical Connector Bolts

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

Hvac

Torque specifications for Hvac

Ac Compressor

1

A/C Compressor Mounting Bolts

M10 x 1.5
Torque Specification
27.5 ft-lbs (37.3 N·m)
Important Notes
Torque value is the midpoint of the provided range (25-30 ft-lbs).

Refrigerant Lines

1

A/C Line Fittings

M8 x 1.25
Torque Specification
17.5 ft-lbs (23.7 N·m)
Important Notes
Torque value is the midpoint of the provided range (15-20 ft-lbs).

Evaporator Housing

1

Evaporator Housing Bolts

M6 x 1.0
Torque Specification
7 ft-lbs (9.5 N·m)
Important Notes
Torque value is the midpoint of the provided range (6-8 ft-lbs).

Blower Motor

1

Blower Motor Mounting Bolts

M6 x 1.0
Torque Specification
7 ft-lbs (9.5 N·m)
Important Notes
Torque value is the midpoint of the provided range (6-8 ft-lbs).

Heater Core

1

Heater Core Inlet/Outlet Fittings

M8 x 1.25
Torque Specification
17.5 ft-lbs (23.7 N·m)
Important Notes
Torque value is the midpoint of the provided range (15-20 ft-lbs).

Condenser

1

Condenser Mounting Bolts

M8 x 1.25
Torque Specification
17.5 ft-lbs (23.7 N·m)
Important Notes
Torque value is the midpoint of the provided range (15-20 ft-lbs).

Control Panel

1

HVAC Control Panel Mounting Screws

M4 x 0.7
Torque Specification
3 ft-lbs (4.1 N·m)
Important Notes
Torque value is the midpoint of the provided range (2-4 ft-lbs).

Suspension

Torque specifications for Suspension

Strut And Shock Absorber

1

Strut/Shock Absorber Mounting Bolts

M12 x 1.5
Torque Specification
18 ft-lbs (24 N·m)
Important Notes
Estimated average torque value from the given range.
2

Coil Spring Mounting Bolts

M10 x 1.25
Torque Specification
32 ft-lbs (43 N·m)
Important Notes
Estimated average torque value from the given range.

Control Arms

1

Control Arm Bolts

M14 x 1.5
Torque Specification
72 ft-lbs (98 N·m)
Important Notes
Estimated average torque value from the given range.
2

Upper Control Arm Bushing Bolts

M10 x 1.25
Torque Specification
42 ft-lbs (57 N·m)
Important Notes
Estimated average torque value from the given range.
3

Lower Control Arm Bushing Bolts

M12 x 1.5
Torque Specification
52 ft-lbs (71 N·m)
Important Notes
Estimated average torque value from the given range.

Steering And Suspension

1

Steering Knuckle Bolts

M16 x 1.5
Torque Specification
85 ft-lbs (115 N·m)
Important Notes
Estimated average torque value from the given range.
2

Ball Joint Nut

M14 x 1.5
Torque Specification
52 ft-lbs (71 N·m)
Important Notes
Estimated average torque value from the given range.
3

Tie Rod End Nut

M12 x 1.5
Torque Specification
17 ft-lbs (23 N·m)
Important Notes
Estimated average torque value from the given range.
4

Sway Bar Link Nut

M10 x 1.25
Torque Specification
37 ft-lbs (50 N·m)
Important Notes
Estimated average torque value from the given range.

Stabilizer Bar

1

Stabilizer Bar Mounting Bolts

M12 x 1.5
Torque Specification
42 ft-lbs (57 N·m)
Important Notes
Estimated average torque value from the given range.

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 are the recommended torque specifications for the cylinder head bolts on a 1996-2004 Mercedes SLK?

Tighten the cylinder head bolts to 50 Nm (37 lb-ft) in three stages. Then, gradually tighten the bolts in 90-degree increments to a final torque of 120 Nm (89 lb-ft).

Q2

What torque should I use when replacing the spark plugs on my 2000 Mercedes SLK?

Apply a torque of 25 Nm (18 lb-ft) when installing new spark plugs.

Q3

How do I properly tighten the lug nuts on my 2002 Mercedes SLK?

Use a torque wrench to tighten the lug nuts to 120 Nm (89 lb-ft). Always follow a star pattern when tightening lug nuts to ensure even distribution of force.

Q4

What IS the correct procedure for torquing the camshaft bolts on a 1998 Mercedes SLK?

Clean the threads of the camshaft bolts and apply a small amount of engine oil. Tighten the bolts to 20 Nm (15 lb-ft) in a crisscross pattern, then gradually increase the torque to 50 Nm (37 lb-ft) in three stages.

Q5

How can I prevent over-tightening bolts and damaging components?

Always use a calibrated torque wrench and follow the specified torque values. Over-tightening can lead to stripped threads, bolt breakage, and component failure.

Q6

Why IS it important to use the correct torque specifications?

Proper torque ensures that bolts and fasteners are tightened to the appropriate degree, preventing loose or overly tight connections. This IS crucial for maintaining the integrity and safety of various vehicle components and systems.

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)

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

  • 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

Tightening Wheel Bolts

Proper wheel bolt torque IS crucial for safe driving. Refer to this guide for specific torque values and step-by-step instructions.

  • Clean the wheel bolts and threads thoroughly.
  • Apply a small amount of anti-seize compound to the threads.
  • Tighten the bolts to 120 Nm (89 ft-lb) in a star pattern.
  • Recheck the torque after 50-100 km (30-60 miles) of driving.
View full procedure

Adjusting Spark Plugs

Spark plugs require precise torque to ensure proper sealing and performance. Follow these guidelines for correct torque and gap settings.

  • Remove the old spark plugs and clean the threads.
  • Apply a dab of anti-seize compound to the new spark plugs.
  • Tighten the spark plugs to 28 Nm (21 ft-lb) using a spark plug wrench.
  • Check the spark plug gap and adjust to 0.8-0.9 mm (0.031-0.035 in) using a feeler gauge.
View full procedure
Technical Service Bulletins

TSB: Engine Oil Filter Replacement

2002-03-01

This bulletin provides updated instructions for replacing the oil filter on 1996-2004 slk models. Proper torque values are specified to ensure a leak-free seal.

1996-2004 slk

Resolution: Replace the oil filter using the updated procedure.Tighten the oil filter cap to 25 Nm (18 ft-lb).

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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.
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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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