Does the cylinder head gasket need to have holes or openings on its surface?

Question

DentroTest · Accepted Answer

The main purpose of the cylinder head gasket is to seal the joint between the engine block and the cylinder head, preventing compression leaks from the cylinders and unwanted mixing of fluids. However, for the engine to work, the gasket must necessarily have holes that match exactly those in the top surface of the engine block. These openings allow the cylinders to pass through, house the studs or tightening bolts and keep the passages through which the coolant and the lubricating oil flow continuous. That is why it is not true that the gasket must not have openings: the design of the gasket isolates each passage without impeding the flow or causing a loss of compression. Nor is it true that only gasoline engines have them: both diesel and gasoline engines need them.

Does the cylinder head gasket need to have holes or openings on its surface?

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