Crankshaft, Measuring Radial Clearance

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Special tools and workshop equipment required

Plastigage^®

Procedure

NOTE:

Do not interchange used bearings

Bearing shells that are worn down to the nickel layer must be replaced.

-- Remove the crankshaft bearing cap and clean the bearing cap and pins.

-- Place Plastigage^® over entire width of bearing journal or into bearing shells.

Plastigage^® must rest in center of bearing shell.

-- Install the crankshaft bearing cap and tighten with the old bolts -1 to 10-, refer to Figure. Do not turn the crankshaft.

Fig 1: Crankshaft Bearing Cap Bolt Tightening Sequence

Courtesy of AUDI OF AMERICA, LLC

NOTE:

Ignore bolts -arrow A-.

-- Remove the crankshaft bearing cap again.

-- Compare width of Plastigage^® with calibrated scale.

Radial clearance:

New: 0.017 to 0.037 mm.
Wear limit: 0.15 mm.

-- Replace bolts for the final assembly.