[Healeys] Cam wear question

[Michael Salter]

Hi Bob,
You don't mention what oil you used in your engine.
As you know there has been massive discussion on the issue of ZDDP and its
effect on cam wear and you may have read my blog post on the problems that
we encountered. http://www.netbug.net/blogmichael/2006/12/01/cam-issues.
I have a very good friend and fellow Kiwi who races a very fast mini and he
experienced much the same problems until he resorted to a custom
modification to original lifters using silicon nitride for the wear surface.
These lifters have survived some serious engine failures, overheats, over
revs, lack of oil and other indignities and are still as good as new... and
none of the cams that have been used with them show any problems with lobe
failures...even the broken ones !!! He uses synthetic oils exclusively.
If I encounter problems with the lifters in #174 I will have no hesitation
in having a set of original lifters modified for my engine.
Michael S
BN1 #174


On Sun, Dec 25, 2016 at 6:32 PM, Bob Spidell <bspidell at comcast.net> wrote:

> The cam we just pulled out of my BJ8 showed considerable wear, even though
> I'd changed the oil regularly (I did get almost 120K on it).  I can see how
> a roller cam would suffer less wear since there could be considerably less
> friction on the lobes, but don't see why OHC cams don't suffer similar wear
> since they apply similar pressure--minus the lifter and pushrod weight--on
> either followers or the valves directly.  What am I missing?
>
> Bob
>
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-- 
*If you can't fix it with a hammer, you've got an electrical problem.*
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