Us TR people are caught between a rock and a hard place.
Having been thru an entire engine rebuild due to cam lobe
disintegration, I decide to opt for lifter/lobe bedding over
piston ring seating. I ran the car for 20 minutes at a steady
2000 rpm, and then I put her on the dyno and did my break
in of the rings. Do the best you can. The rings will probably
not seat 100%, but I'm happy with 80%, and the possibility
of 100% over time IF the cam/lifters hold up their end of the
bargain. The motor will run fine at 80% ring seat; the motor
will not run fine if it's missing a cam lobe. Roller lifters on a
modern engine are a whole different ball of wax.
David Brady
'68 TR250
CD8124L
Jim Wallace wrote:
> If the piston ring bedding-in system described in that article is to be
> used, how does it affect the cam and lifter bedding-in? I was prepared to
> run the car for about 20 minutes at 2000 rpm, I think it was, to deal
with
> the cam/lifter set, but from what is being said then it's "too late" for
> bedding-in the rings........and I have to deal with both.....any input?
> TIA,
> Jim
> TR3a w/87.2 mm pistons and nifty BFE lifters (phosphated?)
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