RE: Lifter Hardness

[TeriAnn Wakeman <twakeman@cruzers.com>]

I talked to a Moss rep about lifters yesterday.  There are evidently 2 
companies in the world making lifters for the TR2-4 engines.

One problem Moss is having is trying to find a factory spec for lifter 
hardness.  They have found a British auto industry spec that says 45 is 
an acceptable level of hardness, and MG specified a rockwell hardness of 
45 for their lifters.

Evidently a lifter common failure mode is flaking caused by too much 
surface hardening of the lifter.

They seem to be inclined to specify a minumim harness of 45 and have no 
idea of a set max hardness.  If anyone has any REAL factory data on 
hardness specs for TR lifters Moss would love to get a copy.  THey want 
to know how hard is enough for good reliability and where hardness might 
start causing flaking under use.


TeriAnn Wakeman               If you send me direct mail, please
Santa Cruz, California        start the subject line with TW - 
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