Vehicles using M272.921 engine list:

Engine M272.921

Symptoms:
- Rough idling and misfires
- Loss of power and poor acceleration
- Engine warning light (Check Engine) illumination
- Oil leaks around the valve cover and timing chain area
- Excessive oil consumption
- Unusual noises from the timing chain area (rattling or knocking)

Diagnosis:
- Inspect for oil leaks around the valve cover gasket and timing chain cover
- Use a diagnostic scanner to check for misfire codes (e.g., P0300-P0306) and camshaft timing errors
- Check the condition of the spark plugs and ignition coils
- Perform a compression test to rule out internal engine damage
- Inspect timing chain tensioners and guides for wear or failure
- Verify proper operation of the variable valve timing (VVT) system

Fixes:
- Replace worn or leaking valve cover gaskets to stop oil leaks
- Renew timing chain tensioners and guides if worn or damaged to prevent timing chain slack and noise
- Replace faulty ignition coils and spark plugs to resolve misfires and rough running
- Clean or replace the camshaft adjuster solenoids to restore proper VVT function
- Address oil leaks promptly to avoid further engine damage
- Use OEM parts for replacements to ensure compatibility and durability

Prevention:
- Regularly change engine oil and use the manufacturer-recommended oil grade to maintain proper lubrication and prevent sludge buildup
- Follow the scheduled maintenance intervals for spark plug and ignition coil replacement
- Monitor oil levels frequently and inspect for leaks during routine servicing
- Avoid extended high RPM driving until timing chain components are confirmed in good condition
- Use quality fuel to reduce carbon deposits and maintain engine efficiency

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