Camshaft Bearing Journal Clearance

Camshaft Bearing Journal Clearance

NOTE: Make sure that the following stages are followed exactly. The tappets or followers must be removed to carry out this measurement.

NOTE: Make sure that the camshaft is to specification.

NOTE: The bearing caps and journals should be free from engine oil and dirt.





1. Position on a length of plastigage on the bearing cap.
^ Insert the camshaft, without lubrication, into the cylinder head.
^ Position a plastigage strip, which should be equal to the width of the bearing cap, on the bearing journal.
2. Install the camshaft bearing caps.
^ Follow the relevant tightening sequence.

NOTE: Do not strike the bearing caps.

3. Remove the camshaft bearing caps.
^ Follow the relevant loosening sequence.





4. Using the special tool, read off the measurement.
^ Compare the width of plastigage with the plastigage scale.
^ The value that is read off is the bearing clearance.
^ If the values are not to specification install a new camshaft.