[Healeys] Oil Pressure

richard mayor boyracer466 at gmail.com
Sun May 10 17:25:04 MDT 2020


The lifter faces are not flat. They have a crown so they rotate in the
bores as the cam lobes move across them. At low RPMs the lifters do not
rotate so much.  It is absolutely essential on initial start up that the
lifters are rotating so the cam and lifters can properly bed in. This is
accomplished if the engine is reving at least 1500 RPM.

On Sun, May 10, 2020 at 2:24 PM Michael MacLean <rrengineer.mike at att.net>
wrote:

> Why do I keep hearing on initial start up immediately get it up to approx
> 2000 rpm and run it 20 minutes to bed in the lifters and cam.  Old wives
> tale.  I have seen it done.
> Mike MacLean
>
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>
> On Sun, May 10, 2020 at 2:09 PM, Michael Salter
> <michaelsalter at gmail.com> wrote:
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