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ENGINE WITH 4 MAIN BEARING • When checking #1 main bearing shim # 2 main bearing. • When checking #2 main bearing shim #1 & #3 main bearing. • When checking #3 main bearing shim #2 & #4 main bearing. • When checking #4 main bearing shim #3 main bearing. NOTE: REMOVE ALL SHIMS BEFORE REASSEM- ALTERNATIVE METHOD The weight of the crankshaft can be supported by a jack under the counterweight adjacent to the bearing PLASTIGAGE PROCEDURE (1) Remove oil film from surface to be checked. Plastigage is soluble in oil. (2) Place a piece of Plastigage across the entire width of the bearing shell in the cap approximately (3) Remove the bearing cap and compare the width of the flattened Plastigage (Fig. 2) with the NOTE: Plastigage is available in a variety of clear- ance ranges. Use the most appropriate range for CONNECTING ROD BEARING CLEARANCE Engine connecting rod bearing clearances can be determined by use of Plastigage or equivalent. The (1) Rotate the crankshaft until the connecting rod to be checked is at the bottom of its stroke. (2) Remove oil film from surface to be checked. Plastigage is soluble in oil. (3) Place a piece of Plastigage across the entire width of the bearing shell in the bearing cap approx- (4) Assemble the rod cap with Plastigage in place. Tighten the rod cap to the specified torque. Do not (5) Remove the bearing cap and compare the width of the flattened Plastigage (Fig. 2) with the NOTE: Plastigage is available in a variety of clear- ance ranges. Use the most appropriate range for CHECKING ENGINE OIL LEVEL The best time to check engine oil level is after it has sat overnight, or if the engine has been running, Checking the oil while the vehicle is on level ground will improve the accuracy of the oil level Fig. 2 Clearance Measurement LH ENGINE 9 - 3 GENERAL INFORMATION (Continued) |