---------- Forwarded Message ----------
From: Brian Lanoway, 76214,2773
TO: Tom Tweed, INTERNET:ak627@dayton.wright.edu
CC: Triumph Digest, INTERNET: triumphs@autox.team.net
DATE: 25/06/96 9:15
RE: Copy of: RE: TR6 oil pressure & spin-on oil filter
on June 24, 1996 Tom Tweed wrote....
>Are you absolutely, positively sure that when you installed the spin-on
>convertor, you located the o-ring correctly against the block mating surface?
>That looks to me to be the most dangerous part of installing one
>of those, which I too have, on my TR-250...
>The reason I'm wondering about this is that a few years ago a friend's
>TR-6 launched rods #1 and #5 sideways out thru the block, and upon our
>autopsy of the engine, we found a mashed, displaced o-ring in the spin-on
>convertor. Could the oil pump have been madly pumping oil in a tight
>circle, with that displaced o-ring providing the short-circuit ??
God Tom, you give me the shivers!
I did use a heavy grease to install the inner o-ring on the spin-on filter
adaptor, but since you can't see the damn thing after you install it, you never
absolutely, positively know if you got it right - unless you take it apart,
which means that you've then got a second chance to get it wrong....
Since the oil pressure sensor measures the pressure in the oil flow path through
the block at a different location from the filter, and since I'm getting the
'recommended' 40psi at 2000 rpm when hot, I'm assuming (no, hoping) that I don't
have such a short-circuit - or even if I do, I've still got enough pressure
(and therefore flow) to service all the rotating bits in the engine.
On second thought (I wish I had a diagram of the engine's oil flow path), if you
do have such a short-circuit, wouldn't the oil simply by-pass the filter on it's
way to the rest of the block - with the unfiltered oil still getting to all
those rotating bits providing the necessary, but dirtier lubrication? SOL'ers
Tom and I could use your help here... what is the effect of a improperly seated
inner o-ring on this spin-on oil filter adaptor?
Nevetheless, since no one else has reported such a 5 to 10 psi drop in oil
pressure after installing the spin-on filter, I'm going to take my adaptor off
this weekend and visually inspect that inner o-ring. I'll let you and the list
know what I find.
Thanks for the input. I agree, life with a TR isn't right unless you're
constantly worrying about it!
Regards,
Brian
73 TR6
Winnipeg, Canada
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