Crankshaft, Measuring Radial Clearance
WARNING: This page is about a different car, the 2015 Audi A7 Quattro, 2014 Audi A7 Quattro, 2013 Audi A7, and 2012 Audi A7. However, it is still accessible from the selected car via links, so may be relevant.
Special tools and workshop equipment required
- Plastigage
Procedure
-- Remove the guide frame and clean the bearing journals.
-- Place the Plastigage over the entire width of the bearing journal or into the bearing shells.
- Plastigage must rest in center of bearing shell.
-- Position the guide frame and tighten the old bolts to the final tightening specification -item 7- OVERVIEW - CRANKSHAFT => List Item: Bolt. Do not turn the crankshaft when doing this.
-- Install the guide frame.
-- Compare width of Plastigage with calibrated scale.
Radial clearance:
- New: 0.015 to 0.055 mm.
- Wear limit: 0.080 mm.
-- Replace the guide frame bolts that are tightened with an additional turn.