Camshaft, Measuring Radial Clearance

WARNING: This page is about a different car, the 2015 Audi Q7, 2014 Audi Q7, 2013 Audi Q7, 2012 Audi Q7, and 2011 Audi Q7. 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 camshafts. Refer to CAMSHAFTS, REMOVING AND INSTALLING .

-- Mark the assignment of the roller rocker lever for installation later.

-- Remove the roller rocker lever and place it on a clean surface.

-- Clean the bearing and the bearing journals.

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

Plastigage® must rest in center of bearing.

-- Install the camshafts, mount the guide frame and tighten the bolts to the final tightening specification. Refer to Figure. When doing this, be careful not to rotate the camshafts.

-- Remove the bearing bracket and camshafts.

-- Compare width of Plastigage® with calibrated scale.

Radial clearance:

With bearing-diameter 24 mm: 0.024 to 0.066 mm
With bearing-diameter 36 mm: 0.032 to 0.078 mm

-- Use new bolts for the final assembly.