When I restored my TR3A from 1987 to 1990, I re-did the engine with 80,350
miles on it. Some of the cam followers (they were all original from new)
had the circular spiral pattern on them. A few were worn with a groove as
much as 1/32" deep at the center. To me, this indicated these hadn't been
rotating, at least for some time. I replaced the grooved ones with new
ones.
I lapped the bottoms of the cam followers flat (even the new ones were flat)
and put it all together again. "TRusty" has been running fine with this
set-up for the last 12 summers during which time, I drove it more than
70,000 miles of street and highway (fairly high speed and long distance)
touring.
I never took them out again to see how they look.
My cam is the original (it's never been out of the block) and it has a
little more than 150,000 miles on it.
Don Elliott, Original Owner, 1958 TR3A, Montreal, Canada
----- Original Message -----
From: "Larry Young" <cartravel@pobox.com>
To: "Wes Dayton" <oilyrag@hsrca.org.au>
Cc: "Friends of Triumph" <fot@autox.team.net>
Sent: Thursday, December 19, 2002 8:52 AM
Subject: Re: TR Cam Lobes
> Wes,
> This is the way I understand it. For proper operation you need two
conditions:
> (1) the lobe of the cam must be tappered so that it will contact the
lifter off
> center and cause it to turn and (2) the lifter has a slight crown so that
the
> point of contact is not at the edge of the cam lobe.
> Larry Young
> Forever Young Racing
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