GM 10111769 Timing Cover Oil Seal

Where a new or re-ground crankshaft is to be fitted, or the original one has been re-ground, the correct bearings must be fitted. The V6 engines require the rear main bearing oil seal to be fitted with the upper half seated on the cylinder block seat and the lower half on the rear main bearing cap with the lips turned forward. If two lips are available place the one helix forward. For the seal halves install the protector installation tool and lubricate the seal lips with fresh engine oil. Place the main bearings in the cylinder block and bolt the main bearing caps in place; apply engine assembly lube to the bearing surfaces. Be very gentle in placing the crankshaft in its corresponding location so as not to scrap the bearing surfaces off the journals. It is necessary to put a layer of brush-on sealer on the block mating surface and the related surface of the bearing cap while the crankshaft or seal should not be contacted. Place securing bolts of the main bearing caps on the crankshaft and onto the cylinder block in a manner to face an arrow on the bearing. Tighten all the main bearing cap attaching bolts to the prescribed torque, apart from the number 5 (L4) or number 3 (V6) main bearing cap which should be initially tightened to about 15-18 Nm. Gently strike the end of the crankshaft with a lead hammer if the rear bearing is not seated properly, then re-torque all bearing cap bolts to the prescribed standards. For crankshaft end play, push the crankshaft forwards and check with the feeler gauge the clearance between the front of main bearing and the crankshaft thrust surface. Last put in the rear oil seal and the flywheel to help rotate the engine during reassembly, for L4 engines place the Woodruff key into the slot in the end of the crankshaft then put in the crankshaft timing gear and be sure that the timed mark on the crankshaft and camshaft gears match.