Vehicles using M112.97x engine list:

Engine M112.97x

Symptoms:
- Rough idling and misfires
- Oil leaks around the valve cover and camshaft seals
- Engine overheating or coolant loss
- Check engine light illumination with related fault codes
- Reduced engine performance and fuel efficiency

Diagnosis:
- Inspect ignition coils and spark plugs for wear or damage, as misfires are common
- Check valve cover gasket and camshaft seal areas for oil leaks
- Perform a cooling system pressure test to identify leaks or faulty components
- Scan for diagnostic trouble codes (DTCs) to pinpoint sensor or ignition issues
- Examine the intake manifold and vacuum lines for leaks affecting engine performance

Fixes:
- Replace worn or faulty ignition coils and spark plugs to resolve misfires
- Renew valve cover gaskets and camshaft seals to stop oil leaks
- Repair or replace leaking coolant hoses, thermostat, or radiator components to address overheating
- Clean or replace the mass airflow sensor and throttle body if dirty or malfunctioning
- Use OEM parts for replacements to ensure compatibility and longevity

Prevention:
- Follow regular maintenance intervals for spark plug and ignition coil replacement
- Change engine oil and filter frequently to prevent sludge buildup and seal degradation
- Monitor coolant levels and condition, flushing the cooling system as recommended
- Use high-quality fuel and additives to keep the intake system clean
- Regularly inspect for leaks and address minor issues before they escalate

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