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When it comes to sealing an engine, the gasket is the hardworking soldier that takes a tremendous amount of abuse but is typically never recognized for its effort. One of the most important gaskets that keep cylinder head hardware protected from the elements and keeps oil from escaping from your motor is the valve cover gasket. Most valve cover gaskets are made from plastic or cork and are used as a seal between the cylinder head and the valve cover itself.
Although the valve cover gasket is well protected from the top and bottom, it is very delicate and prone to damage from the sides. Over a period of time the gasket becomes brittle and will crack due to exposure to dirt, debris, heat and other elements. When this occurs, the gasket can lose its integrity and will leak, potentially causing cosmetic issues with leaking oil or reduced engine performance. If not replaced by mechanic in time, it can lead to complete engine failure.
There are a few common symptoms that will indicate a potential problem with a bad or failing valve cover gasket. If you recognize any of these warning signs, contact a mechanic as soon as possible so they can replace the valve cover gasket if needed.
1. Burning oil smell
2. Valve cover is dirty and leaking oil
3. Engine is low on oil
4. Engine is running rough and causing misfires
Source;
www.autoblog.com/2016/01/13/s...