Diesel Engine Knock and Noise Problems - A Quick Reference Solutions Guide

Summary list of the most common causes and parts needed to fix them Part 4 of 5

The common problem is listed and the reference word or words for the part to fix it are listed as a solution.Using our website search box for both tech help and products, enter the words of the solution. This will take you directly to the resources we offer to help you fix the problem. We also list the difficulty. Level 1 indicates a beginner DIY job. Level 3 would indicate an intermediate DIY repair. Level 5 means you need professional mechanical experience to complete the job successfully.

Problem & Solution

Common among these chassis:

W110 W111 W112 Sedan
W115
W116
W123
W124
W126
W140
W201

USE OUR SEARCH BOX TO QUICKLY LOCATE YOUR SOLUTION: Enter key words listed below

1. Common Knock & Noise Problems:  Engine makes noise - belts loose or worn

Solution:V Belts

Difficulty Level:  2

2. Common Knock & Noise Problems:  Engine makes noise - serp belt shock loose

Solution: Belt shock

Difficulty Level: 2

3. Common Knock & Noise Problems: Engine makes noise - worn or loose fan clutch

Solution: Fan Clutch

Difficulty Level: 2

4. Common Knock & Noise Problems:  Engine makes noise - collapsed motor mounts

Solution: Motor mounts

Difficulty Level:  3

5. Common Knock & Noise Problems: Engine makes noise - loose air cleaner housing

Solution: Air Cleaner anti rattle kit

Difficulty Level: 2

6. Common Knock & Noise Problems: Engine makes noise - exhaust leaks

Solution: Exhaust

Difficulty Level: 2/3

7. Common Knock & Noise Problems: Engine makes noise - injector nailing

Solution: Diesel Purge

Difficulty Level:  1

8. Common Knock & Noise Problems:  Engine makes noise - injector nailing continues

Solution: Diesel injectors

Difficulty Level:  2

9. Common Knock & Noise Problems: Engine makes noise - pump out of time

Solution: Diesel Performance Tuning manual

Difficulty Level: 3

10. Common Knock & Noise Problems: Engine makes noise - valve clearances loose

Solution: Valve adjusting wrenches

Difficulty Level:  2

11. Common Knock & Noise Problems:  Engine makes noise - timing chain/tensioner loose

Solution: Timing chain

Difficulty Level:  3

12. Common Knock & Noise Problems: Engine makes noise - cracked or loose flex plate

Solution: Flex plate

Difficulty Level: 4

13. Common Knock & Noise Problems:  Engine makes noise - worn cam and bearings

Solution: Camshaft

Difficulty Level: 3

14. Common Knock & Noise Problems:  Engine makes noise - loose manifolds

Solution: Manifold gasket

Difficulty Level:  3

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Note: Additional resource guides are listed to the right.