TL AWD V6-3.7L (2010)
Connecting Rod Bearing: Service and Repair
Connecting Rod Bearing Replacement
Connecting Rod Bearing Clearance Inspection
1. Remove the connecting rod cap and the bearing half See: Crankshaft/Service and Repair/Crankshaft and Piston Removal.
2. Clean the connecting rod journal and the bearing half with a clean shop towel.
3. Place a strip of plastigage across the rod journal.
4. Reinstall the bearing half and the rod cap, and tighten the bolts.
NOTE:
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Apply new engine oil to the bolt threads and flanges.
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Do not rotate the crankshaft during inspection.
5. Remove the rod cap and the bearing half and measure the widest part of the plastigage.
Connecting Rod Bearing-to-Journal Oil Clearance
6. If the plastigage measures too wide or too narrow, remove the upper half of the bearing, then install a new, complete bearing with the same color
code, and recheck the clearance. Do not file, shim, or scrape the bearings or the caps to adjust clearance.
7. If the plastigage shows the clearance is still incorrect, try the next larger or smaller bearing (the color listed above or below that one), and check
clearance again. If the proper clearance cannot be obtained by using the appropriate larger or smaller bearings, replace the crankshaft and start
over See: Crankshaft/Service and Repair/Crankshaft and Piston Removal.
Connecting Rod Bearing Selection
Each connecting rod falls into one of four tolerance ranges (from 0 to 0.024 mm (0.0009 in), in 0.006 mm (0.0002 in) increments) depending on the size
of its big end bore.
It's then stamped with a number or bar (1, 2, 3, or 4/I, II, III, or IIII) indicating the range. You may find any combination of 1, 2, 3, or 4/I, II, III, or IIII
in any engine.
Big End Bore Size