Combined with the violent explosions that happen inside the engine and the heat produced, the stressed metal gives way and cracks. When the bolts are tightened too much, it stresses the cylinder head. It’s a thing, and it does happen very infrequently. The bolts fastening the cylinder head to the engine block are overtightened. There really are three main ways a cylinder head can crack, and all three are doozies. It seals the combustion chambers, the oil passages, and the coolant passages in the cylinder head to the block. Under the cylinder head where it meets the engine block is a cylinder head gasket. On the top is a valve cover gasket, preventing oil from spraying all over the place. The camshaft rotates when the engine is running, timed perfectly with the crankshaft so the engine runs smoothly.

There might be more than one too, for engines with DOHC, or dual overhead cams. The cylinder head contains valves which operate the intake of air and fuel, as well as valves that release exhaust gases from the combustion chamber.Ī camshaft also works its way into the cylinder head, usually on the top. Vehicles designated as a V design – V6, V8 and such – have two cylinder heads, one for each side of the V. Unless you drive a car with a wacky Wankel rotary engine, your car has at least one cylinder head. Selling a damaged or non-running car to private sellers can be difficult, but at we give you an instant offer and tow your car for free! See how much you can get here. If it doesn't make sense to spend so much based on the value of your car, the best option might be selling. Cylinder head repair or replacement can be one of the most costly repairs your car can endure.

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