Camshaft, Measuring Radial Clearance

Special tools and workshop equipment required 

• Plastigage

Procedure 

Fig 1: Bearing Cap for Camshafts - Tightening Sequence

Courtesy of AUDI OF AMERICA, LLC

• Use the old bolts for radial clearance measurement.

-- Remove the camshaft housing. Refer to CAMSHAFT HOUSING, REMOVING AND INSTALLING .

-- Remove the bolts -10 to 1- and remove the bearing cap for the camshafts.

-- Remove the bearing cap for the camshafts.

-- Clean the bearing and the bearing journals.

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

• The Plastigage must rest in center of bearing.

-- Position the bearing cap and tighten it with the old bolts an additional turn. Refer to Figure. Do not turn the camshaft while doing so.

-- Reinstall the bearing cap.

-- Compare the width of the Plastigage with the measuring scale.

Radial clearance:

• Bearing diameter 24 mm: 0.024 to 0.066 mm.
• 36 mm bearing: 0.032 to 0.078 mm.

-- Replace the bolts for the final assembly.