This cylinder-head gasket seals the combustion chamber between the engine block and the cylinder head. It contains the high-pressure combustion gases and prevents coolant and engine oil from mixing between their respective passages. A failed gasket allows compression loss, coolant contamination, or external leakage, typically indicated by overheating, white exhaust smoke, or pressurization of the cooling system. As an original-manufacturer component, the gasket matches the original material stack and crush height, which the head-bolt torque sequence relies on for proper clamping force. On reinstallation, clean both sealing surfaces and follow the specified torque pattern and angle-tightening steps for the head bolts.