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  • July 09, 2020, 08:22:07 PM

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Author Topic: 258 warm idle oil presure  (Read 1690 times)

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Offline donnyeagle

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258 warm idle oil presure
« on: December 18, 2012, 01:20:07 AM »
I have heard that the AMC 258 is known for low oil pressure. Just wondering if it's true.

Offline donnyeagle

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Re: 258 warm idle oil presure
« Reply #1 on: December 18, 2012, 01:21:55 AM »
I'm running a NAPA oil filter, Rotella 15-40 and mechanical gauge.

Online mudkicker715

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Re: 258 warm idle oil presure
« Reply #2 on: December 18, 2012, 07:56:17 AM »
I have 2 strokers. so that means the oil pressure from the critical areas remains the same. head and lifters do not affect it so much. oil filter maybe never experienced it. i went through different brands. and i use a mechanical gauge.

i get at idle ca. 25 psi warm 45 to 55 psi warm highway. so this 3 psi holy crap. my concord old terrible rebiuld on it gets 15 psi warm idle. another mechanical gauge.

3psi would worry me

Manitowoc WI

Offline carnuck

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Re: 258 warm idle oil presure
« Reply #3 on: January 13, 2013, 04:23:23 PM »
Depends on the oil you run. It's flow that is more important that actual pressure. Fram filters have a habit of imploding and blocking oil galleries and killing motors (I have photos of the crud I back flushed from my 460 in the '91 E350 I had that ONLY ran factory and Fram filters from new.)
AMC/Jeep gauges are for amusement only. Any correlation between them and reality is purely coincidental!

Offline Still Pat

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Re: 258 warm idle oil presure
« Reply #4 on: June 10, 2019, 11:01:35 AM »
Mine runs right at to just over 20 warm idle. Brandon said he had a rebuilt engine installed approximately (speedometer inop.) 15 - 20 thousand miles ago. I am running a mechanical gauge also.

Offline Billman

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Re: 258 warm idle oil presure
« Reply #5 on: September 05, 2019, 08:38:42 PM »
I get 0-3 after it warms up along with a bit of smoke out the tailpipe.  Tried a different oil pump and it didn't help. Car is sitting because of it. I've got a long block with 100k on it and a 4.0 head to put in when I get the time
1982 SX/4
1983 SX/4
1983 wagonProject
1984 wagon DD
1996 Jeep
2007  Caliber
2004 Silverado

Online vangremlin

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Re: 258 warm idle oil presure
« Reply #6 on: September 06, 2019, 09:01:44 AM »
The 1981 Service manual says that normal operating oil pressure at 600 rpm should be 13 psi, and 37-75 at 1600+ rpm
1981 Kammback 258 - "Pepe"
1980 Coupe 258 - "Ginger
1972 Gremlin X 304
1978 Gremlin 4 cyl 121 - sold
1964 TBird 390 - sold


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