Valve Adjustment

Valve Adjustment

The M54 uses hydraulic valve lifters (hydraulic lash adjusters) that automatically maintain correct valve clearance. No manual valve adjustment is required.

Hydraulic Lifters

• Self-adjusting using engine oil pressure
• No service interval for adjustment
• Ticking noise can indicate low oil pressure or worn lifter

Lifter Noise

If you hear valve train ticking:

1. Check oil level and condition first
2. A brief tick on cold start is normal (lifters filling with oil)
3. Persistent ticking may indicate a worn lifter
4. Ensure oil pressure is correct
5. Use correct oil viscosity (5W-30)