normal oil psi? - JeepForum.com

 
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post #1 of 14 Old 03-24-2009, 09:37 AM Thread Starter
wetdog
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normal oil psi?

What does a 258 s oil press settle down to after warm up ? I start out at 75 to 80 then it goes to about 25 is this okay ? is it a jeep thing ? Mark

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post #2 of 14 Old 03-24-2009, 09:51 AM
DT5150
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hey mark, welcome to the forum.

i used to have an image from the jeep service manual of normal oil pressure during start up and warmed up, but i can't seem to find. it. i don't recall the numbers off the top of my head, but yours sound just fine. the oil will get thinner as it heats up, thus the psi drop. are you getting these readings off the stock gauge? if you want true numbers, you can run a mechanical gauge in conjunction with your stock gauge.

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post #3 of 14 Old 03-24-2009, 10:17 AM
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post #4 of 14 Old 03-24-2009, 02:02 PM Thread Starter
wetdog
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Thanks , I have an auto meter mechanical guage the stock guage used to just kinda move around .
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post #5 of 14 Old 03-24-2009, 02:59 PM
Bubba Ray
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Your oil pressure sounds good to me. Mine max's at 25 psi.
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post #6 of 14 Old 03-24-2009, 03:03 PM
Mike Romain
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Mine runs at 45-50 psi hot on the highway and 20 at idle. I have a mechanical gauge also.

Mike
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post #7 of 14 Old 03-24-2009, 03:17 PM
Eaallred
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Everything i've read from various automakers spec non-hydraulic lifter engines at 10 psi per 1000rpm fully warmed up with the recommended motor oil listed in the manual. My F-head idles fully warmed up at just a hair over 20 with 10w30.

I've never paid much attention to hydraulic lifter engine recommendations though. Your oil psi sounds in line with my other hydraulic lifter vehicles though from what I see on thier gauges (94 Silverado, 03 GMC van, 03 Honda Accord).
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post #8 of 14 Old 03-24-2009, 03:27 PM
fastang
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As long as it comes up when you rev the engine or accelerate you should be fine.....
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post #9 of 14 Old 03-24-2009, 05:39 PM Thread Starter
wetdog
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The pressure comes up instantly to at least 45 lbs/ psi This site rocks by the way thanks again.
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post #10 of 14 Old 03-24-2009, 05:43 PM Thread Starter
wetdog
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scottymac thanks for the info its printed and saved .
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post #11 of 14 Old 03-24-2009, 06:44 PM
scottymac62
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You're welcome but you need to thank JH....it's his web site.
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post #12 of 14 Old 03-24-2009, 09:35 PM Thread Starter
wetdog
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okay thanks jh it great info.
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post #13 of 14 Old 03-25-2009, 03:24 AM
powermacj7
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I was questioning my oil pressure as well. My gauge jumps around a bit. 20 at idle, and mostly 40 at high speeds.
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post #14 of 14 Old 03-25-2009, 01:24 PM Thread Starter
wetdog
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Iam glad I switched to mechanical guages the stockers are pretty bad at letting you know anything quickly.
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