[Fot] Help! Ambro engine crankcase internal pressures. ????

[Mike Munson]

It sounds to me like compression gasses are pressurizing your crankcase. So
there may be an issue like a crack or casting flaw with your head or a poor
sealing head gasket.
 Mike

Sent from my iPhone

On May 12, 2012, at 8:10 PM, Joe Alexander <n197tr4 at cs.com> wrote:

> Mike,
>
> I changed the head to lower the compression to use pump gas as i drive the
Ambro on the street.
>
> I am now wondering if this isnt where the problem started.
>
> I drove the Ambro to Minneapolis 200+ miles, following 'uncle jack', the
Stag and Johnmac at Freeway speeds. It had the old head and it didnt leak any
oil.
>
> My time working on this car is far apart in time so I tend to lose
continuity.
>
> What can there be about this head that would do this? i am not losing
coolant, btw.
>
> Thanks Mike and all.
>
>
>
>
>
> Joe Alexander
> A. R. E.
> 645 1st Street
> Jesup, Iowa 50648
> 319.464.4711  (cell)
> n197tr4 at cs.com
>
>
> -----Original Message-----
> From: Mike Munson <fasttrs at yahoo.com>
> To: tr4racing <tr4racing at googlemail.com>
> Cc: Joe Alexander <n197tr4 at cs.com>; fot-bounces
<fot-bounces at autox.team.net>; fot <fot at autox.team.net>
> Sent: Sat, May 12, 2012 7:48 pm
> Subject: Re: [Fot] Help! Ambro engine crankcase internal pressures. ????
>
> Joe, I have had head gaskets that leaked and pressurized both the crankcase
and
> the coolant passages. However, the most common reasons for over pressurized
> crankcases that i have experienced are improperly seated, broken or worn
rings
> and holes in pistons.
>
> Mike
>
> Sent from my iPhone
>
> On May 12, 2012, at 4:45 PM, tr4racing at googlemail.com wrote:
>
> > Hi Joe,
> >
> > Piston rings would be my first guess. If the head gasket would leaking it
> would force out water before oil starts leaking.
> > A wild idea is that your exhaust valve guide is too wide and exhaust gas
is
> getting forced to the valve area.
> >
> > Cheers
> > Chris
> > Gesendet mit BlackBerry von Vodafone
> >
> > -----Original Message-----
> > From: Joe Alexander <n197tr4 at cs.com>
> > Sender: fot-bounces at autox.team.netDate: Sat, 12 May 2012 12:31:45
> > To: <fot at autox.team.net>
> > Subject: [Fot] Help!  Ambro engine crankcase internal pressures.    ????
> >
> > I need to develop a list of possible causes of internal pressures.
> >
> > It's been going on for a long time, but the Ambro get's attention last.
> >
> > This list is alive and well and I need help..................TIA
> >
> > After about 3,000 RPM or so, the pressure builds and pushes oil out
regardless
> > of methods of venting. What are the possibilities?
> >
> > I really hate to pull the engine without an idea of the cause.
> >
> > Is there any possibility of a crack in the head that pushes air into the
> > crankcase?
> >
> > A list of possibilities would be very useful to me.   Finding the problem
> > before pulling engine would make me very happy.....begging.
> >
> >
> >
> > Joe Alexander
> > A. R. E.
> > 645 1st Street
> > Jesup, Iowa 50648
> > 319.464.4711  (cell)
> > n197tr4 at cs.com
> > _______________________________________________
> > fot at autox.team.net
> >
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