low oil pressure
11-16-2001, 01:35 PM
#1
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low oil pressure
The oil pressure in my '83 944 starts at about 4.5 at idol. After warming up is drops to 1.5 and after a long or hard drive it drops to about 1.01. This is only at an idol however when the engine is over 1500 rpm's it is at about 3.4 to 4 when hot. From what I read it seems like it may be the relief valve. Does anybody agree or have a better idea.
I would also appreciate any tips or procedures for replacing the oil pressure relive valve. Thanks for you time.
Joe (and my 944)
I would also appreciate any tips or procedures for replacing the oil pressure relive valve. Thanks for you time.
Joe (and my 944)
11-16-2001, 02:13 PM
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I guess for now I won't worry about it then. It just scares me a little when I'm at a light and see the gauge so close to 1 bar. Thanks again for the info. 
11-16-2001, 02:18 PM
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Originally posted by ModusPonens:
<STRONG>...usually doesn't drop past 3.5 when at idle; is my pressure too high?</STRONG>
<STRONG>...usually doesn't drop past 3.5 when at idle; is my pressure too high?</STRONG>
11-16-2001, 04:07 PM
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I have heard from several people that the bars can coicide with the RPM (in thousands obviously), so 1 bar or so at idle is perfect. Mine idles at about 1.25, tops out around 5 at high RPMs.
You're good to go.
-Matt
You're good to go.
-Matt
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11-16-2001, 06:12 PM
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I had an oil change recently, and changed back to a cheap Mahle OEM filter (~$4) from one of the expensive (~$12) K&N oil filters. I immediately noticed a slight pressure drop. Top pressure reads about 4.5 whereas it used to be 5, and now it bottoms out to just under 2 bar, whereas it used to bottom out just above. Grade of oil the same (10W30), but different brand (Kendall instead of Chevron).
So if you're paranoid maybe you should try a K&N oil filter for the next change, and see if it brings it up a bit. 1 bar does sound a bit on the low side. $8 or so might be considered cheap peace of mind...
-Mark 86 944 NA
So if you're paranoid maybe you should try a K&N oil filter for the next change, and see if it brings it up a bit. 1 bar does sound a bit on the low side. $8 or so might be considered cheap peace of mind...
-Mark 86 944 NA
