XJ (X350) V8-4.2L SC (2004)
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Camshaft: Testing and Inspection
Camshaft Bearing Journal Clearance
Camshaft Bearing Journal Clearance
1. 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.
Position on a length of plastigage on the bearing cap.
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Insert the camshaft, without lubrication, into the cylinder head.
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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.
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Follow the relevant tightening sequence.
3. NOTE: Do not strike the bearing caps.
Remove the camshaft bearing caps.
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Follow the relevant loosening sequence.
4. Using the special tool, read off the measurement.
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Compare the width of plastigage with the plastigage scale.
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The value that is read off is the bearing clearance.
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If the values are not to specification install a new camshaft.
