Quote:
Originally Posted by 2LZ
.07MM isn't much, but it's enough. With no gap, there's no oil on the mated surfaces like cam-to-pushrod. Could cause scorching issues.
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Yes, 2LZ, you are right. And even worse is the rocker arm valve interface. Especially on the exhaust side. The exhaust valve stem runs very hot, and needs oil to carry away some of the heat and prevent galling of the rocker arm pad and/or the valve top.