Engine Code P0121 - Search Videos

THE RED DYE GASKET CHECK

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THE RED DYE GASKET CHECK

Before the cylinder head is installed, the engine block deck is checked with red marking dye and a flat checking block. The dye reveals contact across the sealing surface, helping spot low areas, warping, scratches, or uneven spots that could prevent the head gasket from sealing correctly. Skipping this step can lead to coolant leaks ...

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