Worn valve guides??
Sent from my iPhone
On 26/06/2011, at 12:58 PM, Bob Spidell <bspidell@comcast.net> wrote:
> After bragging about our 100M's compression numbers I have a
> concern. We seem to be getting a lot of pulsed pressure in the valve
> cover, as felt at the oil filler hole. There is very little pressure
> at the end of the road draft tube. Given we have good compression,
> so, theoretically shouldn't have a lot of blow-by, what could cause
> pressure in the valve cover? The engine was totally rebuilt, and I
> believe we cleaned out the road draft tube but don't remember for
> sure (we were otherwise pretty careful).
>
> All hints, ideas, even knowledge welcome.
>
> TIA,
> Bob
>
> --------------------------------
> Bob Spidell - San Jose, CA
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