subject: something related to the gasket [print this page] Actually, there are many types of this term such as multiple layers steel(MLS), solid copper, composite and elastomeric and so on. No matter what, a head gasket is a gasket which locates between the engine block and cylinder head in an internal combustion engine. It is hoped to ensure maximum compression and avoid leakage of coolant or engine oil into the cylinders. Since it shares the same strength requirements as other combustion chamber components, the head gasket should be elaborately designed and manufactured in order to achieve the requirements. Thus, occasionally, the compression in the cylinder would cause a leak to make the gasket be damaged. If the cylinder heads are made from aluminum rather than iron, as the characteristic of being lighter, the stress placed in the head gasket would be stronger and damages would be worse. Fortunately, the engine makers have solved the problem by adding a non-stick coating such as Teflon to the surface of the head gasket.
Besides, if the gasket fails to work, a variety of problems can occur. And the compression loss is the common one. The condition of a head gasket is typically investigated by checking the compression pressure with a pressure gauge or a leak-down test, and/or noting any indication of combustion gasses in the cooling system on a water-cooled engine. Thus, people can infer the problems from the signs like that the oil mixed with coolant and excessive coolant loss with no apparent cause, or presence of carbon monoxide or hydrocarbon gases in the expansion tank of the cooling system.And KOMATSU is also a major manufacturer of the gasket.
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