![]() Replacing valve cover gaskets in a V6 or V8 engine involves more labor. Valve cover gaskets are very common to leak in many Subaru engines. For example in the 2012+ Subaru Forester with a non-turbo engine, replacing a valve cover gasket in a repair shop will cost 1.3-1.5 hours of labor plus the cost of part for one side. In a Subaru "boxer" engine with two separate valve covers it's a bit more expensive. In a simple in-line 4-cylinder engine, the valve cover gasket replacement may cost from 1.0 to 1.5 hours of labor plus the cost of the gasket kit which is not very expensive. How much does the valve cover gasket replacement cost? A valve cover gasket kit (part) cost $20-$65. O-rings that seal spark plug wells are usually included in the valve cover gasket kit. This issue is often discovered during the spark plug replacement. In some cases, a leaking valve cover gasket or O-ring may result in oil getting into the spark plug well. If the engine shows oil leaks, but the source of the leak is not clear, your mechanic may recommend cleaning the affected area and re-checking it in a few days to see where the fresh leak is coming from. How do mechanics diagnose a leaking valve cover gasket? To repair an engine oil leak, the source of the leak must be identified first. There are many other engine components that can also leak oil, including cam and crank seals, front engine cover seal, PCV system, oil pressure switch and other parts. Of course, the valve cover gasket is not the only source of possible oil leaks. Symptoms of a leaking valve cover gasket include oil drops under the engine, burnt oil smell under the hood and visible traces of oil coming down the engine. What are the symptoms of a bad valve cover gasket? If the valve cover gasket is old, it's also often replaced during major engine repairs. When does the valve cover gasket need to be replaced? There are no mileage requirements, the valve cover gasket only needs to be replaced if it leaks. Over time and under high temperatures, the gasket hardens and becomes brittle, which might cause it to leak oil. In most modern cars, the valve cover gasket is made of rubber. If your car has a timing chain, it will most likely have a metal timing cover.The valve cover gasket seals the gap between the valve cover and the cylinder head. If the timing cover gasket breaks, you will notice engine oil leaking. In this way, the timing gears and chain receive lubrication with the engine oil. In case of cars that have a timing chain, the timing cover secures the front section of the engine block with the help of a timing cover gasket. In case of engines that include a timing belt the timing cover only protects the timing belt and can be made of plastic, metal or both. Without the protection of the timing cover, the belt can skip, slip off the timing gears or even break. If your car has a timing belt, the timing cover protects it from road debris that can damage and break its teeth. As long as they are spinning, the engine’s valves open and close in synchronized movement with each cylinder’s intake and exhaust strokes.ĭepending on the make of your car, it will have a timing belt, timing chain or cam belt. The timing belt or chain of your car controls the rotation of the camshafts and crankshaft in the internal combustion engine. ![]() ![]() The timing cover is an essential component designed to protect the timing belt, timing chain or cam belt of your car from road debris, grime and gravel.
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