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oil pressure problem

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Old 07-09-2014, 07:22 PM
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Default oil pressure problem

i have 235000 miles on my 01 XJ i put a new oil pump in around 120000 miles. Oil pressure is dropping to zero when I stop at a light and when i'm running its just over 20. Do i need to rebuild my engine or do you think its the oil pump again? i do here some slight rattling type noises. any help would be appreciated.

thanks
Old 07-09-2014, 08:40 PM
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Originally Posted by mtulett1
i have 235000 miles on my 01 XJ i put a new oil pump in around 120000 miles. Oil pressure is dropping to zero when I stop at a light and when i'm running its just over 20. Do i need to rebuild my engine or do you think its the oil pump again? i do here some slight rattling type noises. any help would be appreciated. thanks
I wouldn't drive around like that. Test it with a mechanical oil pressure gauge
Old 07-09-2014, 08:58 PM
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Originally Posted by XJlimitedx99
I wouldn't drive around like that. Test it with a mechanical oil pressure gauge
This^^.
Old 07-09-2014, 09:11 PM
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just remember oil pumps dont create pressure they create the flow. bearing clearances are what make the oil pressure
Old 07-09-2014, 09:14 PM
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Originally Posted by travs2448
just remember oil pumps dont create pressure they create the flow. bearing clearances are what make the oil pressure
Correct.

And that pressure needs to be verified with a mechanical gauge, not relying on the Jeep dash gauge/sender.
Old 07-09-2014, 11:10 PM
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Like the others said. You need to verify the pressure. It may something as simple as a bad sending unit, plugged sending unit ports or even a crappy oil filter.
Old 07-10-2014, 12:12 AM
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just curious.. what brand of filter are you running?
Old 07-10-2014, 12:14 AM
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Originally Posted by JackJare9455
just curious.. what brand of filter are you running?
Ahem......Stealing my material, I see. LOL!!!!!
Old 07-10-2014, 12:18 AM
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Originally Posted by mtulett1
i do here some slight rattling type noises.
When and from where? Not that noises are unusual for a high mileage 4.0.
Agreed on the mechanical gauge, do that ASAP. Along with changing any bedliner-wearing oil filters you may run into.
Old 07-10-2014, 12:24 AM
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Originally Posted by cruiser54
Ahem......Stealing my material, I see. LOL!!!!!
what?? NEVER!! LOL

Its a legitimate question!
Old 07-10-2014, 04:23 AM
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Originally Posted by JackJare9455
just curious.. what brand of filter are you running?
I'm using a mopar oil filter
Old 07-10-2014, 06:10 AM
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Originally Posted by RTorrez1
Like the others said. You need to verify the pressure. It may something as simple as a bad sending unit, plugged sending unit ports or even a crappy oil filter.
One more time!
Old 07-10-2014, 07:40 AM
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Originally Posted by Kingfisher
One more time!
Can't be repeated often enough.
Old 07-10-2014, 07:40 PM
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ok i will be taking it to a mechanice to check that pressure but in the mean time i changed the sending unit and it seems be holding the pressure. I am going to put in some 15w 40 and i'll change out that filter too. i thin my CAT is shot too or its the bearings in the motor LOL who knows thanks everyone.
Old 07-10-2014, 08:45 PM
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Oh no........not 15W40.


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