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on the adjacent bearings and tightening bolts to • 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 reassembling engine. (2) Alternative Method: jack under the counterweight adjacent to the bearing (3) Remove oil film from surface to be checked. Plastigage is soluble in oil. NOTE: The 3.8L engine may be equipped with any (4) Place a piece of Plastigage across the entire width of the bearing shell in the cap approximately (5) Remove the bearing cap and compare the width of the flattened Plastigage (Fig. 94) with the scale NOTE: Plastigage is available in a variety of clear- PLASTIGAGE METHOD—ENGINE OUT-OF-VEHICLE (1) With engine in the inverted position (crank- shaft up) and mounted on a repair stand, remove (2) Remove oil from journal and bearing shell. bearing and place it in parallel with the journal axis (4) Carefully install the main bearing cap and tighten the bolts to specified torque (Refer to 9 - CAUTION: Do not rotate crankshaft or the Plasti- (5) Carefully remove the bearing cap and measure the width of the Plastigage at the widest part using Fig. 93 Plastigage Placed in Lower Shell 1 - PLASTIGAGE Fig. 94 Clearance Measurement CS ENGINE 3.8L 9 - 167 CRANKSHAFT MAIN BEARINGS (Continued) |