Crankshaft, Measuring Radial Clearance

WARNING: This page is about a different car, the 2021 Audi A6 Quattro, 2020 Audi A6 Quattro, and 2019 Audi A6 Quattro. However, it is still accessible from the selected car via links, so may be relevant.

Special tools and workshop equipment required

Plastigauge^®

Procedure

Use the old bolts for radial clearance measurement.

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

-- Place the Plastigauge^® over the entire bearing width on the pin or in the bearing shells.

Plastigauge^® must rest in the center of the bearing shell.

-- Mount the crankshaft bearing cap and tighten with the old bolts -1 to 10- (refer to Figure). Do not turn the crankshaft while doing so.

Fig 1: Bearing Caps Tightening Sequence

Courtesy of AUDI OF AMERICA, LLC

-- Remove the crankshaft bearing cap again.

-- Compare the width of Plastigauge^® with the measuring scale.

Radial clearance:

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

-- Replace the bolts for the final assembly.