GM 25519733 Engine Crankshaft

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To remove the engine, first drain the oil and remove it from the car. You should mount the engine on a work stand with the oil pan facing up. The next steps involve removing the front cover, timing chain and gears, oil pan, and oil pump. For identification purposes, stamp the cylinder number on connecting rod bolt bosses and caps. You have to protect crank journals by installing rubber hose over there before removing connecting rod caps. Finally, mark all main bearing caps to remember how they were on installation. Slowly lift out the crankshaft after removing all main bearing caps. If necessary, replace both upper and lower halves of these crankshaft main bearings that should be cleaned carefully at first. Examine clearance by using Plastigage® along with replacing bearings if required. Before installing them in place, install crankshaft together with bearings while cap bolts must be torqued per specifications. At last, measure end play of this shaft then fix a rear main bearing seal on its place.