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Home >> Dodge and Ram >> 2020 >> Durango R/T, AWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 10 (6.4L Engine (Service Information)) >> Engine Block >> Bearing(S), Crankshaft, Main >> Standard Procedure >> Standard Procedure - Crankshaft Main Bearing - Fitting >> Main Bearing Journal Diameter (Crankshaft Removed)

Main Bearing Journal Diameter (Crankshaft Removed)

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If the engine encounters a catastrophic failure, the engine oil cooler and lines must be replaced or damage to the new engine or components could result.

GC0092112Courtesy of CHRYSLER GROUP, LLC

Crankshaft removed from the cylinder block.

Clean the oil off the main bearing journal.

Determine the maximum diameter of the journal with a micrometer. Measure at two locations 90° apart at each end of the journal.

The maximum allowable taper is 0.008 mm (0.0003 inch). The maximum out-of-round is 0.005 mm (0.0002 inch). Compare the measured diameter with the journal diameter specification (Main Bearing Fitting Chart). Select inserts required to obtain the specified bearing-to-journal clearance.