Joe and Tim,
A leakdown test might be even more informative.
Good luck,
John
On Tue, May 15, 2012 12:47 pm, Tim Murphy wrote:
> Joe,
> I may have missed this on this thread, but have you done a
> compression check? This should show the results of some of the possible
> causes I've seen mentioned.
>
> Tim
>
> -----Original Message-----
> From: fot-bounces@autox.team.net [mailto:fot-bounces@autox.team.net] On
> Behalf Of Joe Alexander
> Sent: Saturday, May 12, 2012 8:11 PM
> To: fasttrs@yahoo.com; tr4racing@googlemail.com
> Cc: fot-bounces@autox.team.net; fot@autox.team.net
> Subject: Re: [Fot] Help! Ambro engine crankcase internal pressures. ????
>
> 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@cs.com
>
>
>
>
>
> -----Original Message-----
> From: Mike Munson <fasttrs@yahoo.com>
> To: tr4racing <tr4racing@googlemail.com>
> Cc: Joe Alexander <n197tr4@cs.com>; fot-bounces
> <fot-bounces@autox.team.net>;
> fot <fot@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@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@cs.com>
>> Sender: fot-bounces@autox.team.netDate: Sat, 12 May 2012 12:31:45
>> To: <fot@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@cs.com
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