TROUBLESHOOTING DIESEL ENGINES
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LIQUI MOLY  Solutions: Tapping / Clicking Engine Noise

This is usually caused by lack of proper lubrication in the engine's hydraulic lifters. When worn or inadequately lubricated, these make a particular clicking noise not hard to recognize by a professional mechanic. 

Use LIQUI MOLY (pour in oil) Hydraulic Lifter Additive to improve lubrication and dampen the noise from worn lifters.

2770 HYDRAULIC LIFTER ADDITIVE copy_edit
Other possible causes:

1 - Dirty Air Intake System (EGR Valve)

2 - Wrong motor oil viscosity or Low quality motor oil

3 - Accumulated sludge in engine chamber / Old motor oil.

 

OIL CHANGE SERVICE REQUIRED: Professional Service

- Clean the motor oil system to remove accumulated sludge before adding fresh oil See

Better to maintain than to repair