Standard Procedure - Main Bearing Clearance
WARNING: This page is about a different car, the 2011 RAM Pickup and 2011 RAM Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.
- Remove bearings and inspect the main bearing bores for damage or abnormal wear.
- Measure main bearing bore diameter (1) after tightening main bearing cap bolts to 176 N.m (130 ft. lbs.). See MAIN BEARING BORE DIAMETER table for specifications.
- Install the crankshaft main bearings and measure main bearing bore diameter with the main bolts tightened to 176 N.m (130 ft. lbs.). See MAIN BEARING BORE DIAMETER table for specifications.MAIN BEARING BORE DIAMETER
ITEM MAIN BEARING BORE DIAMETER (MAXIMUM) BEARINGS INSTALLED 83.106 mm (3.2719 in.) BEARINGS REMOVED Min 87.983 mm (3.4639 in.) Max. 88.019 mm (3.4653 in.) - Measure the diameter of the crankshaft main journal at the locations shown in illustration. Calculate the average diameter for each side of the journal.
- Calculate the main bearing journal to bearing clearance. Maximum clearance is 0.119 mm (0.00475 inch). If the crankshaft journal is within limits, replace the main bearings. If not within limits, grind the crankshaft to next size and use oversize bearings. See CRANKSHAFT MAIN JOURNAL DIAMETER table for specifications.
- Measure thrust distance at the No. 6 position.
CRANKSHAFT MAIN JOURNAL DIAMETER
| ITEM | SPECIFICATION |
|---|---|
| Minimum diameter | 82.962 mm (3.2662 in.) |
| Maximum diameter | 83.013 mm (3.2682 in.) |
| Maximum out of roundness | 0.050 mm (.002 in.) |
| Maximum taper | 0.013 mm (.0005 in.) |
| Thrust distance (at No. 6 position) | Min. 0.065 mm (.003 in.) |
| Max. 0.432 mm (.017 in.) |