[TR] Oil Pressure

[dlylis at gmail.com]

I think you are talking about a 3A and since you have said "seal" I assume you have replaced the scroll with a "modern seal" that leaks in an "oh so modern way". I ground off the scroll and replaced with the "modern seal" and have regretted doing so as it leaks as bad as before. . . But I paid money to get it to leak like this this time. Unlikely your oil pressure has anything to do with the leak. 
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-----Original Message-----
From: <wbeech at flash.net>

Date: Wed, 16 Sep 2009 10:13:02 
To: <dlylis at gmail.com>; 'Andrew Uprichard'<auprichard at comcast.net>; <triumphs-bounces at autox.team.net>; 'Randall'<tr3driver at ca.rr.com>; <triumphs at autox.team.net>
Subject: RE: [TR] Oil Pressure


This has been a fascinating discussion!  I was not aware of this valve, does
it regulate the oil pressure in the engine or just to the gauge?  If to the
engine, could it be part of the reason I am seeing excessive leaking from my
brand new rear main seal? 

Right now, most of time, driving at 3000rpm yields a pressure reading of
80-90psi.

Bill Beecher
'58 TR-3A TS/30766 L (On the road in 2009!)
"A Triumph is man's best friend, it always comes when it is called...of
course, some times it is difficult to make it go"

 

-----Original Message-----
From: triumphs-bounces at autox.team.net
[mailto:triumphs-bounces at autox.team.net] On Behalf Of dlylis at gmail.com
Sent: Wednesday, September 16, 2009 8:54 AM
To: Andrew Uprichard; triumphs-bounces at autox.team.net; 'Randall';
triumphs at autox.team.net
Subject: Re: [TR] Oil Pressure

I paid a lot of attention to clearances when I rebuilt my 3A motor. I have
55 at hot idle and can clearly see the bypass valve function at 75 lbs when
I wind the motor over 3500. 20/50 oil. 
New gauge so I am reasonably confident of the numbers.
There, I have showed you mine! ;-)
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-----Original Message-----
From: "Andrew Uprichard" <auprichard at comcast.net>

Date: Wed, 16 Sep 2009 05:35:52
To: 'Randall'<tr3driver at ca.rr.com>; <triumphs at autox.team.net>
Subject: Re: [TR] Oil Pressure


List:  thanks to all who replied.

As usual, I like Randall's caveat.  My newly-rebuilt engine was reading 50
at idle and 80 at 3000 rpm:  I dialed it back by adjusting the set-up on the
filter head and now it reads 30 and 50 respectively.  My other car has a
much wider span of pressures over the rpm range, so I think I'll get the
gauge checked out as well.

Andrew

-----Original Message-----
From: triumphs-bounces at autox.team.net
[mailto:triumphs-bounces at autox.team.net] On Behalf Of Randall
Sent: Wednesday, September 16, 2009 2:54 AM
To: triumphs at autox.team.net
Subject: Re: [TR] Oil Pressure

> Before I give away my numbers, what range (idle to full 
> acceleration) should
> one aim for with oil pressure on a TR3?

while I agree with Tony's numbers, I have seen TR3 engines survive with much
less.  In fact, I drove a whole year with an engine that showed no pressure
at all at hot idle, and no more than 30-40 psi at hot cruise with the
heaviest oil I could find.

I'll also throw out my usual caveat : Before you get too concerned over what
the gauge reads, make sure it is accurate.  Old gauges frequently lie.

Randall
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