Believe me when I say it can be spun bearings. I had the front main spin in
a 2.8L GMC, and it forced oil out of the dip stick hole, the pcv valve and
anywhere else it could.
Lawrence R Zink
Zink@pdq.net
-----Original Message-----
From: The Solomon Organization <ab096@oak-web.washington-ch.oh.us>
To: Zink <zink@pdq.net>; Triumphs@autox.team.net <Triumphs@autox.team.net>
Date: Thursday, February 12, 1998 11:53 PM
Subject: Re: Question I'm afraid to ask
>At 05:22 PM 2/12/98 -0600, you wrote:
>>Sounds like spun main bearings.
>>Lawrence R Zink
>>Zink@pdq.net
>>-----Original Message-----
>>From: SF <boylston_st@yahoo.com>
>>To: triumphs@autox.team.net <triumphs@autox.team.net>
>>Date: Wednesday, February 11, 1998 7:36 PM
>>Subject: Question I'm afraid to ask
>>
>>
>>>Hello list -
>>>
>>>I recently got my hands on a '77 Spitfire, and among its many problems
>>>is one that worries me: For some reason, motor oil is being forced
>>>back up through the dipstick tube. Has anyone seen this sort of thing
>>>before, and if so, what did it take to fix it?
>
>
>This question seems to be avery common one for our later spits. Many
>others (including me) have had the same problem. Seems to be related to
>changes in the carb and air pump systems. Others have advised removing the
>pcv hose t at the carb and running direct to the canister. Most who have
>tried this have relieved the problem. But, could be other causes...we do
>seem to be getting an increase in pan pressure to push this stuff out.
>Spun bearings? Dunno...but methinks this would simply cause the oil
>pressure relief valve to activate and return oil (under some pressure) back
>to the sump...this could cause the problem, but then why does it go away
>for so many when the pcv plumbing is altered? Wouldn't the vacuum created
>at the carb relieve some of this? Also, tripping the relief valve would
>reduce oil to the top end sto a great degree and I would think we'd all be
>blowing apart for a lack of lubricity!
>
>I have puzzled over this one for some time. But I will check the
>compression to see if it is blowby (not likely I think as the car runs
>really great and has only about 30,000 original and well maintained miles
>on it). There has to be a really good and logical physical/mechanical
>explanation for this one!
>
>Anyone else have some engineering answers?
>
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