David,
My engine is freshly rebuilt, with all new bearings, pistons(std. size),
'take-off'head from minimania( non-smog 12g940casting), etc. etc..
Currently I'm at (1), and it does 'leak oil like crazy'. So it sounds like I
can
try (2), and hopefully that should work fine. My engine is still being broken
in
(less than 30 miles) so I don't think the rings, and valves are fully seated
yet. In any case, can I put the pvc valve off the vent in the 1275 timing chain
cover, or do I need to run a breather pipe off my valve cover?? I am using an
aluminum valve cover, and I would need to drill a hole if I wanted to add the
PVC breather there.
FYI - I noticed that the chrome oil filler cap has a small hole in the middle
of
it, that does act as a vent for the valve cover area.
David Vizards book covers a setup call the 'vacusump' system, but it requires
having a tube welded into the exhaust system, with a gulp valve. Using the
exhaust to pull a vacuume on the crankcase. In addition it also uses a PVC
valve
arrangement simular to what you describe.
Regards - Bryan
>To: "Bryan Vandiver" <Bryan.Vandiver@eng.sun.com>
>Cc: <spridgets@autox.team.net>
>Subject: Re: Timing the 1275 ? (vac. advance with a sidedraft)
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>
>Bryan,
>My experience, limited to my own car and 3 different engines is as follows.
>1. Vent Crankcase to atmosphere and leak oil like crazy.
>2. Use manifold vacuum and a PCV valve from an 80's 4cyl engine of similar
>size. If the engine has been bored with extra piston to bore clearance, or
>is tired, this results in occasionally sucking some oil and blowing blue
>smoke (an equally embarassing phenomenon)
>3. Same as above but with an engine in good condition works very well.
>
>I have a Cannon Manifold, and to make sure that both intake ports were
>leaned out equally, I tapped a hole into the balance tube. The engine I
>have in the car now is of unknown origin (long story there). At the point
>that the engine warms up it seems to pull a little oil through the PCV and
>it smokes for about one block. Then the problem goes away and the car runs
>great the rest of the time.
>
>It has been a long time since I read Vizard's book, so I don't remember what
>he recommended. I am curious as to what he recommends.
>
>David Riker
>74 Midget
>63 Falcon
>
>----- Original Message -----
>From: Bryan Vandiver <Bryan.Vandiver@Eng.Sun.COM>
>To: <chuckc@ibm.net>; <davidr@sunset.net>
>Cc: <spridgets@autox.team.net>
>Sent: Friday, August 06, 1999 2:16 PM
>Subject: Re: Timing the 1275 ? (vac. advance with a sidedraft)
>
>
>> David,
>>
>> I know I'm opening a 'new can of worms' (again), but what did you do about
>your
>> PVC, and crankcase breathing with your webber set up?? I"m trying to get
>> everything up and running first, and I figured I'd deal with it later, but
>I
>> will have to address this sometime. I noticed that the Vizard book has a
>setup
>> to pull a vacuum on the crakcase, but it doesn't look that easy to set up.
>It
>> appears that putting a vacuum on the crankcase can pretty much eliminate
>oil
>> leaks on our engines, do you know of anyone that has done this?
>>
>
>
>
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