Fitting

3.0L (4V) and 3.4L SHO Engines
1. Clean crankshaft journals. Inspect journals and thrust faces for nicks, burrs or roughness that would cause premature bearing wear.

2. CAUTION: To maintain proper main bearing bore alignment, the lower cylinder block must be loosened and tightened as a unit.

If crankshaft main journals are not damaged or worn excessively, use select-fit codes on cylinder block and crankshaft with the select-fit grade chart to determine appropriate replacement grade for the crankshaft main bearings.
3. If crankshaft journals are worn or damaged, replace crankshaft and use select-fit grade chart to determine appropriate replacement grade for the crankshaft main bearings.