After seeing a variety of reprofiled cams fall apart within a few thousand
miles I had them all subsequently rehardened (a few hundred). To the best of
my knowledge the cam lobes are chill cast iron, and the lower you go down
the softer they get. As rehardened ones don't fail and cost about $3 why
isn't it done? and no they don't bend as there are no stresses left in them,
even six cylinder ones. Kent Cams, a well know reprofiler in the UK actually
claimed that one of their reworked cams failed as that was the one we sent
to them! and we obviously hadn't used cam lube - what a load of bollox. I've
never used cam lube and not had a single failure with a rehardened cam.
John Kipping
----- Original Message -----
From: "Larry Young" <cartravel@pobox.com>
To: "TeriAnn Wakeman" <twakeman@cruzers.com>
Cc: "FOT" <fot@autox.team.net>
Sent: Tuesday, September 10, 2002 6:18 AM
Subject: Re: Lifter Hardness Confusion
> Greg Solow's post in January said he typically gets 52 to 55 for OEM
> lifters. I just had a set tested that ranged from 48 to 53 (note: these
> were measured on the 15-N scale and I'm converting to Rc).
>
> I have it straight from Steve Long, who's taken over for Erson, that his
> reground cams are not rehardened. He said there is some residual hardness
> of about 35 Rc. So what hardness lifter is needed? I'm one confused
Okie.
> Larry Young
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