<VV> Help - Oil Out Dipstick Tube

[Mark Durham]

Jay, short of the oil being overfilled, the rings should seat in fairly
quick. If you want to do that static, you can do a break in like I did with
aircraft piston engines without driving the car, and you can leave the oil
cap off to relieve the pressure. But the first thing I would do is drain the
oil and then refill just to the add mark to make sure there isn't too much
in there. The suggestion to leave it a quart low is a good idea, see if it
helps, and if so, you can then drive the car to break in the rings.

Static break in procedure:

Start the car and run it until the engine warms up, at whatever RPM is
necessary for proper cam lobe break in. When warm, shut off and let sit
until it is ambient temp.

Start the car and do the same thing again, until the engine is warm. Shut
off and let cool to ambient.

Two runs of three minutes each should set the rings enough that they should
seal enough on the first drive to stop the excessive breather issue. You
could also remove the PCV from the system and just let the pressure blow
unitl it settles down.

My aircraft engines would finish sealing in the first 20 minutes of flight,
after the two on the ground runs. This was noted by a significant reduction
in CHT. Oil consumption in that first 30 minutes of run time was about 1/4
to 1/2 quart, and would stabilize to almost zero after that (Which is great
for a big bore aircraft engine).

Mark Durham





On Fri, Sep 3, 2010 at 8:47 AM, Mark Corbin <airvair at earthlink.net> wrote:

> Jay,
>
> Wonder if your new deeper oil pan has put your filling oil level out of
> wack. Could you have accidentally overfilled it?
>
> -Mark
>
>
> > [Original Message]
> > From: Jay Pitchford <jay.pitchford at gmail.com>
> > Subject: Re: <VV> Help - Oil Out Dipstick Tube
> >
> > Tim,
> >
> > Tom Ray is a Corvair guy, and was recommended by Mark Corbin. Tom
> > rebuilt his first Corvair engine 30 years ago, and his shop
> > specializes in air cooled engines.
> >
> > If the true sign of a man's genius is how much he agrees with you,
> > then you'll think Tom is brilliant ... he also thinks we need some
> > more easy drive time tomorrow, after sealing up the dipstick tube a
> > bit better and rechecking the PCV venting.
> >
> > Re: rings/pistons/cylinder clearances ... for those who recall my
> > earlier post about the pulled head stud trauma, the reason we fought
> > so hard to save this block was because all the clearances were not
> > just proper, but downright excellent.
> >
> > jcp
> >
> > p.s. -  this boy ain't gonna 'ricky race' this Corsa 140 anytime soon.
> > I've just been without my convertible since April, and I want to drive
> > it even once between the Memorial and Labor Day holidays.
> >
> > On Thu, Sep 2, 2010 at 7:55 PM, shortle <shortle556 at earthlink.net>
> wrote:
> >
> > Assuming all rings/pistons/cylinder clearances are proper, how about
> > try driving it "very easily" for awhile with the intentions of getting
> > the rings to seat better. Don't be in such a mad rush to get the car
> > back to ricky race around (it is a Corsa 140 right?). Is your mechanic
> > a "Corvair" type guy (meaning he is familiar with the peculiarity of
> > an air cooled engine)? If all else fails, then I might be looking to
> > shorten the engine oil dipstick tube where it goes into the crankcase.
> > Just R + R the oil pan again. Best of luck.
> > > Timothy Shortle in (beautiful) Durango Colorado
> > >
> >
>
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