|
|
SIDE CLEARANCE MEASUREMENT Slide snug-fitting feeler gauge between the con- necting rod and crankshaft journal flange (Fig. 36). FITTING CRANKSHAFT MAIN BEARINGS INSPECTION Wipe the inserts clean and inspect for abnormal wear patterns and for metal or other foreign material NOTE: If any of the crankshaft journals are scored, Inspect the back of the inserts for fractures, scrap- ings or irregular wear patterns. Inspect the upper insert locking tabs for damage. FITTING BEARINGS (CRANKSHAFT INSTALLED) The main bearing caps, numbered (front to rear) from 1 through 7 have an arrow to indicate the for- Each bearing insert pair is selectively fitted to its respective journal to obtain the specified operating The main bearing journal size (diameter) is identi- fied by a color-coded paint mark (Fig. 38) on the When required, upper and lower bearing inserts of different sizes may be used as a pair. A standard size NOTE: When replacing inserts, the odd size inserts Once the bearings have been properly fitted, pro- ceed to Crankshaft Main Bearing—Installation. BEARING-TO-JOURNAL CLEARANCE (CRANKSHAFT When using Plastigage, check only one bearing clearance at a time. Install the grooved main bearings into the cylinder block and the non-grooved bearings into the bearing Install the crankshaft into the upper bearings dry. crankshaft journal to be checked. Install the bearing cap and tighten the bolts to 108 N·m (80 ft. lbs.) torque. Fig. 36 Checking Connecting Rod Side Clearance— Typical Fig. 37 Main Bearing Wear Patterns 1 – UPPER INSERT 9 - 26 4.0L ENGINE WJ SERVICE PROCEDURES (Continued) |