Reply to "Engine Rebuild"

George PAdmin.

Urban legend.

there are 3 variables, the camshaft, the lifters, and the lifter bores in the block (this affects how the lifter sits on its lobe). Change any of the 3, and a break-in will be required. Breaking-in a cam doesn't harden anything, the cams are hardened during manufacturing. What does hopefully happen during break-in is a good layer of ZDDP is left on the lobes.

By the way, the lifter "foot" & camshaft lobe are splash lubricated, which is why we run the motors at elevated rpm to break them in, more oil is splashing about.

My advice for anyone building a motor is to switch to a hydraulic roller cam if at all possible.

Your friend on the DTBB

7/24/064:57 PM

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