Checking the clearance in the camshaft bearing journals
Camshaft journal diameter
Measure the diameter of the camshaft bearing journal with a micrometer (A).
The inner diameter of the hole of the main bearing in the cylinder head
Measure the inside diameter with a caliper (A) holes in the cylinder head.
Clearance in the camshaft bearing journal
Calculate the gap value using the formula:
(Oil clearance) = (Hole inner diameter) - (Camshaft journal diameter)
If the value obtained is out of specification, replace the camshaft and/or cylinder head assembly.
Note. The upper part of the cylinder head is not replaced separately from the cylinder head, since both parts are machined at the factory together. Replace the upper part of the block head only in combination with the cylinder head.