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Home >> Jeep >> 2023 >> Grand Cherokee Altitude, AWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 14 (5.7L - Engine (Service Information) (2 Of 3)) >> Engine Block >> Standard Procedure >> Crankshaft Main Bearing - Fitting >> Main Bearing Journal Diameter (Crankshaft Removed)

Main Bearing Journal Diameter (Crankshaft Removed)

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With the 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 (0.0004 in.) and maximum out of round is 0.005 mm (0.0002 in.). Compare the measured diameter with the journal diameter specification (Main Bearing Fitting Chart). Select the inserts required to obtain the specified bearing-to-journal clearance.