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Old 09-09-2009, 12:51 PM   #1
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Question Time for new oil pump?

Oil pressure has been from 10 (idle) to about 30 (about 2K rpms) when fully heated up. I have already checked this with mechanical gauge. Engine has 160K miles on it but still running strong.


I am using 10W30 oil with FRAM filter (I kno I kno .. I am never using it again). Should I change the oil pump before it gets ugly or changing the oil/oil filter to different type will help?? It is a 4.0 I6. Thanks so much for your help!

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Old 09-09-2009, 01:16 PM   #2
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try using a little heavier oil

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Old 09-09-2009, 01:51 PM   #3
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replacing your oil pump isnt going to help. as engines wear, tolerances increase resulting in lower oil pressure. i have to run a little heavier oil in my YJ to offset the leakage/blowby/etc.
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Old 09-09-2009, 03:42 PM   #4
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What brand and type of oil is recommended?
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Old 09-09-2009, 03:48 PM   #5
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On previous cars with the same problem I always used 15w45 and some oil additive. I don't know if that would be smart in a Jeep or not.
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Old 09-09-2009, 06:53 PM   #6
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Here in SoCal I run straight 30w. All my oils and additives are Lucas. Honestly it doesn't get that cold to worry about multi grades unless your in the mountains when it gets really cold during the winter. RIght now I would run 30 wt. It is not going to hurt ya.
Oh ya if you are going to buy Lucas Products do not buy them from the auto parts store, your going to pay tooo much! Go straight to a source B. B. Benter Distributing This is not my site but it is where I get my products.
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Old 09-10-2009, 07:30 PM   #7
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Not to hijack but it does go with the theme...

My oil pressure gauge slowly climbs on start up. Slower than it should any way. Enough to make the check gauge light and dinger to go off but than the gauge will climb and every thing goes as normal. I have 78 G's on the odometer and use Mobil 1 synthetic. Should I think about replacing the oil pump?
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Old 09-10-2009, 08:25 PM   #8
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Only 78,000 miles? You shouldn't have to. That is nothing as far as miles. It may just be your sending unit(sensor). What are your pressures while idling or driving?
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Old 09-10-2009, 09:16 PM   #9
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It goes where it always has, about 3/4 on the gauge I think 60. It did not do this til' I started wheeling pretty hard (Rev's at about 3500 to 4000 rpm's). I have about 2000 miles of good hard wheeling on it. The second to last trip was when it started. The oil level has not changed and the oil is still the golden color that it was when I changed it. Having another 1000 miles left til' the next change, I feel the pump could be the culprit.

I did on a other trip manage to make the pass. airbag light go to flickering, maybe I pulled something loose under my rig. And the sending unit is just something else that got damaged, along with the rear door, the windshield, the hood, the grill, the top, and some how got a bubble in my 35" spare tire. Uphill mud runs can be a bitch, so can back up creek bed runs with trees.

Had a good time but this is where I stand. Not worried about the air bag light (I will turn it off) but the oil issue is a pos. problem.

thanks for the help....
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Old 09-11-2009, 12:48 PM   #10
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What's wrong with Fram filters?
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Old 09-11-2009, 12:53 PM   #11
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I haven't heard anyone saying anything good about them but a lot bad reviews. I can't differenciate what's good or bad about a oil filter. I am just going by what I read on this forum.
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Old 09-11-2009, 10:42 PM   #12
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If you oil pressures are where they were before I would say that your pump is not going out due to the fact your pressures are the same. I would on your next oil change go with straight 30w. Still very warm here in california.

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