BMW E36 valve cover gasket leaks and the spark plug wells are oily
Why is there oil in the E36 spark plug wells?
The cause is usually the valve cover gasket. The spark plug well seals come in the same kit and should be replaced at the same time. The oil can cause coughing and occasional cylinder misfire, because it runs into the spark plug hole.
How do I replace the valve cover gasket on an E36?
1. Remove the plastic covers, the ignition coils and the breather hose. 2. Undo the cover bolts and lift the cover off. 3. Clean the sealing surfaces. 4. Fit the new gasket and new rubber rings under the bolts (15 pcs). 5. Tighten the bolts lightly: 10 Nm for M6 thread and 15 Nm for M7 thread.
What else is replaced along with the valve cover gasket?
The gasket kit includes the cover gasket and the spark plug well seals. It is worth renewing the rubber rings under the bolts, since they cannot be bought separately. If there is a washer in the spark plug well, it can be lifted out with a magnetic tool.
Oil runs onto the exhaust manifold even though the gasket has been replaced, what causes it?
A blocked breather can push oil through the gaskets, so it is worth replacing the breather and hoses. Also check that the rubbers are under the bolts. On the M52, oil can also seep from the rear of the block, between the bulkhead and the engine.