What to Do If the Valve Cover Gasket Has Cracks?
2 Answers
If the valve cover gasket has cracks, it needs to be replaced promptly. The valve cover gasket is primarily used to seal and prevent oil leakage. Since the valve cover gasket is mostly made of rubber, it is inevitable that it will harden and age over time, leading to oil leakage. However, oil leakage at the valve cover gasket is not necessarily due to aging; it could also be caused by uneven screw pressure, excessive screw pressure, deformation of the valve cover gasket, blockage of the crankcase forced ventilation valve, or poor quality of the sealing ring or sealant. Effects of Engine Oil Leakage: Long-term oil leakage in the engine can result in insufficient lubrication of internal components, leading to severe wear. If the engine is severely damaged, repairs can be very troublesome and economically costly.
I experienced cracked valve cover gaskets on my vintage car, which is quite common. Usually caused by aging or engine overheating, the deformed gasket develops leaks that drip oil, dirtying the engine bay. Severe leaks can corrode wiring or drip onto the exhaust pipe causing fire hazards – that's dangerous. When I noticed oil stains under the hood with a burnt smell, I immediately went to the repair shop. The mechanic said the gasket must be replaced while checking for loose valve cover bolts. During replacement, it's best to clean the contact surfaces thoroughly to ensure proper sealing. DIY replacement requires specialty tools and patience – manageable for experienced hands but not recommended for beginners to avoid misinstallation and recurring leaks. Regularly inspect the engine, especially before long trips. Don't ignore small cracks – delayed repairs may lead to oil loss and costly engine overhauls.
