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

[Mike Munson]

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
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