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Posted by Manjo on February 9, 2008, 8:43 am
e:
> >When I get the heads and cylinders off, I'm borrowing a bore gauge to
> >check the cylinders for out-of-round that may be allowing oil to seep
> >around the rings at high speed and burn-off on the piston crowns
> >leaving the carbon build-up.
>
> That would be easily checked with a compression or leak down test. =A0Burn=
ing oil
> is always accompanied with oil loss. =A0If you're not losing oil, you're n=
ot
> burning it. =A0Spark plugs will also tell you if you're burning oil or not=
.
Jack: I am loosing oil at the rate of about a quart every 800 miles.
The compression test bumps up fine. A leak down showed less than 2%
loss compression loss. It may be a valve guide problem that I intend
to check shortly.
>
> >I'm also going to ask the machine shop
> >guys to check the heads/ valves just in case oil is leaking around the
> >valve guides (I installed new valve seals last spring).
>
> Does it smoke?
Jack: No smoking, but when I'm leading my wife says she does smell
oil burning from time to time.
>
> What kind of intake and exhaust modifications have you done? =A0It sounds =
like
> you're idling rich.
>
JACK: Extensive changes to both. I've taken out the EPS duct work
and surge tank and have K&N filters mounted directly on each carb
intake port. The exhaust system is a Jardine set that's nearly
straight pipes. I've rejetted with larger main and idle jets to
enrichen the air-fuel mixture to match the higher air volume.
Manjo
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