Pontiac 22525282 Cover Assembly, Engine Front

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For Oldsmobile engines (307, 350, and 403), the steps involve draining the coolant, disconnecting hoses, removing fan, belts, pulley, crankshaft pulley, balancer (on some models), oil pan, front cover bolts, cover, timing indicator, and water pump. Special care should be taken, such as grinding dowel pins and chamfering their ends on later models. Gaskets should be trimmed, mating surfaces cleaned, sealer applied, and new seals and gaskets installed. The cover should be pressed down, rotated to guide the pan seal, and the bolts tightened. Balancer seal surfaces should be lubricated, and all components should be reinstalled in reverse order.

For Mark IV V8, ensure the block and crankcase front cover are clean, cut the tabs from the new oil pan front seal if applicable, and install the seal to the front cover, pressing the tips into the holes.

Remove the two bolts that connect the oil pan to the timing chain cover, and then take off the timing chain cover.

Yes, for big-block Mark IV engines, after removing the attaching bolts, draw the cover slightly away from the engine, cut the oil pan gasket flush with the engine block, and then remove the cover.

Remove the oil pump cover and pack petroleum jelly around the oil pump gears to prevent air space.

Use vise grip pliers to remove dowel pins from the engine block, grinding a chamfer on each pin's end. Cut off excess gasket material at the front of the oil pan until flush with the engine block, and use a gasket scraper to remove all excess from the mating surfaces.

Disconnect the upper and lower radiator hoses along with the heater return hose at the water pump.