CYLINDER HEAD GASKET 27-822844T04

Function and technical context

The head gasket is a critical component in the engine's sealing system that hermetically seals the combustion chamber between the block and the cylinder head. In Mercury V6 2.0L loopcharged engines, this gasket acts as a fundamental barrier to prevent combustion gas leaks, coolant losses and cross contamination between internal circuits. Its deterioration directly compromises the structural integrity of the sealing system, causing pressure losses in the chamber, uncontrolled entry of water into the crankcase and significant reduction in engine performance.

When to replace this part?

Typical symptoms of head gasket failure include engine overheating, milky emulsion formation in the oil (oil-coolant mixture), abnormal coolant loss without apparent external leaks, and loss of cylinder compression. Although there is no fixed preventive maintenance interval for this component, its replacement should be considered mandatory after each major intervention on the cylinder head or engine block, as well as any symptom of fluid contamination. Performing the change preventatively during maintenance tasks avoids costly emergency repairs and prolongs the useful life of the propeller.

Equivalent manufacturer part numbers