Wow. My stock IIa set up runs 40psi at idle and 65 at 3000rpm.
>>> Marin.Faure@PSS.Boeing.com 06/15/01 11:46AM >>>
Date: Thu, 14 Jun 2001 17:44:46 -0400
From: Keith Tanner <keith@miata.net>
Subject: LRO: Oil pressure question.
>Since I installed a spin-on oil filter adaptor, I've been getting only 25
psi of pressure at idle (according to my gauge) and the warning light comes
on. Running pressure is about 40. Oil weight is 10W40 as it was before the
installation. Should I be concerned?
That sounds awfully low, especially at idle. My SIII has always had a minimum
of 40 psi (12:00 position on the dial, which I think is 40 psi), and the
pressure difference between idle and cruising rpm is negligible UNLESS I let
the oil get a bit low. Then the pressure drops to a needle's width or so below
the midpoint on the dial at idle, and climbs back to a needle's width above the
midpoint when the revs go back up. Returning the oil level to the correct level
fixes this, and there is virtually no difference between idle psi and 3,000 rpm
psi. If you're getting only 25 psi at idle plus the
light comes on, I'd say you have a problem. I have always used Castrol 20-40
in my SIII, so I wouldn't say the cause of your low pressure is the wrong weight
oil. My engine has the original filter system on it, but I have heard that it's possible
to install a spin-on adapter in such a way that the oil pressure is negatively affected.
___________________________
C. Marin Faure
(original owner)
1973 Land Rover Series III-88
1991 Range Rover Vogue SE
Seattle
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