My 70 has the "Y" pipe on the body of the HS2's that runs directly to the
oil separator on the timing cover. It uses a calibrated vent (small hole)
on the valve cover to keep the sump negative. Yes! it still leaks! But the
plumbing is like the book says it should be. If you are running a vented
cap and the vent allows to much air in, the vacuum may never be enough to
suck the oil back through the rear spiral where there should have been a
seal in the first place but wasn't. If you remove the cap and put your hand
over the hole (no fingers in there please) you should feel a substantial
vacuum, enough to make your hand stick a little. Your engine will also go a
little lean with the cap off because it is sucking more air than normal. It
were me I would run a non vented cap and drill a small (I started with a #60
bit and made it a little bigger) hole in the top of the valve cover. That
is what I did but YMMV.
Mark
70 Midget
Nashville, TN
http://www.NashvilleTN.org
http://members.home.net/mendicott
----- Original Message -----
> Hi Al,
>
> What Carbs are you running? The only ones I know of that run directly to
the
> timing cover are HIF's, and a 66 shouldn't be running these. Could the
tubing
> be plumbed up Wrong by the PO? Are you in fact running HIF's? Sorry, I
guess I
> need more info to help.
>
> Rick
>
> "Tocci, Al" 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
>
>
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