Possibly valve umbrella seals bad.
If some of these are deteriorated or missing, as more
oil is pumped to the top, more oil can escape past the
guides. (i.e. guides are fine, compression is fine, no
ailings mechanically except oil burning)
Dan Dwelley
77 Midget
Alexandria, Va.
--- "Tocci, Al" <atocci@advanta.com> wrote:
> O.K. list, I'm feeling some frustration by the
> amount of oil my car seems to
> be burning for possible reasons other than tired
> rings or valves. Here are
> the facts:
>
> - 1275 no-smog equip motor running 20W-50 oil
> - freshly rebuilt head by very reputable shop - new
> guides,
> seals, et al
> - compression readings of 183 - 190 lbs each cyl w/
> all plugs
> out, throttle wide open, and no additional oil in
> the cylinders
> - crankcase is vented thru timing chain cover (dah)
> into the
> S.U.s, NOT into the intake manifold thru a PCV
> valve.
> - aftermarket valve cover with VENTED cap
> - exhaust seems to smoke most in the midrange
> (around 3000
> rpms) vs. start-up or under heaviest acceleration.
> I'm sure it's pushing
> more oil at 3000 rpms than it is at 4500 for
> example.
> - oil pressure consistent with what other folks
> report
>
> So, any ideas? Thanks much...
>
> Al Tocci
> Doylestown, PA
> '66 Sprite
>
=====
Dan Dwelley
77 Midget
Alexandria, Va.
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