RX3: Engine Top End Rebuild at 22,450 Miles

[jbfla]

Spud,

Do you know what caused the scoring of the cam lobe in the photo?

Originally Posted by SpudRider

.........

jb

[SpudRider]

Originally Posted by jbfla

Spud,

Do you know what caused the scoring of the cam lobe in the photo?

jb

No, I do not know what caused the scoring. The roller rocker was in good condition. The associated rocker is on the right side in this photograph; it is the exhaust lobe rocker.

I did not notice any valve recession of the exhaust valves. Perhaps it required 16,000 miles for my exhaust valve clearances to settle because of the wear on the camshaft exhaust lobe.