Magazine for the auto service professional
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Circle 119 on Reader Service Card Technical inboard seal lip facing forward. When the cover is fully installed, the guide ring pops of. When installing this type of seal, the seal should be installed dry. Do not lubricate the seal lips prior to installation to the crankshaft. After the rear cover is in place, fush against the block, closely inspect the seal to verify that the lip has not been pulled rearward. If it has, remove the cover, reinstall the nylon guide ring and re-install. Cylinder head gaskets Te subject of cylinder head gaskets deserves an entire, lengthy article devoted to this very complex area of engine sealing. Cylinder head-to-block sealing requires a combination of properly prepared deck surfaces, the correct type of gasket, and the correct clamping force. Internal leakage can allow coolant to enter the combustion chambers and oil passages. If coolant enters the combustion chambers, not only will the engine consume coolant, but any coolant in the chambers will turn to steam, increasing chamber pressure, and eventually damaging pistons and valves. Coolant entering oil will degrade the oil's ability to lubricate. One-piece rear main seals require attention in terms of orientation. If installed backward, or if lips are folded, a severe oil leak is almost guaran- teed. Also check the fange holes.