Valve Cover Gasket and Oil Leak Issues
ModerateEngineThe N74 V12 engine's valve cover gaskets deteriorate with age, causing oil leaks that can drip onto the exhaust manifold and create a burning oil smell. In severe cases, oil can contaminate spark plugs causing misfires.
Most affected: 6.6 V12
Typical symptoms
- •Burning oil smell after driving
- •Oil visible on the sides of the engine
- •Misfires or rough idle
- •Oil dripping on the garage floor
What to inspect before you buy
- ✓Inspect the sides of the V12 engine for oil residue
- ✓Check for burning oil smell when the engine is hot
- ✓Look for oil contamination around spark plug wells