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maxed out oil pressure

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Old Dec 30, 2011 | 10:34 AM
  #1  
countryboybob's Avatar
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From: kentucky
Year: 1996
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Engine: 4.0 H.O.
Default maxed out oil pressure

I recently insalled the new guadge cluster and all is fine except for the oil pressure. It buries the oil pressure guage, anyone have the same problem?? Or could this be normal?
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Old Dec 30, 2011 | 11:28 AM
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From: New Cumberland, PA
Year: 1995
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Engine: 4.0 I6
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i had that problem and it was the oil sending unit.

seeing as you replaced the cluster maybe there's a compatibility issue? i still get confused with cluster swaps.
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Old Dec 30, 2011 | 01:32 PM
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From: MI 48642
Year: 1996
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x2 with the sending unit being related.
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Old Dec 30, 2011 | 02:33 PM
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From: Fauquier County, Virginia
Year: 1991
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I've also heard of senders being an issue with gauge cluster swaps. Especially when going from dummy lights to actual gauges. Many people forget the sending units for each gauge type are different. Did you replace the sender?
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Old Dec 30, 2011 | 02:39 PM
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From: Bergen County, New Jersey U.S.A.
Year: 1990 Laredo
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Engine: 4.0 Inline 6 Renix
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Originally Posted by 1991Jeep_Man
I've also heard of senders being an issue with gauge cluster swaps. Especially when going from dummy lights to actual gauges. Many people forget the sending units for each gauge type are different. Did you replace the sender?
correct if you didnt change the sender it will max out..
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Old Dec 30, 2011 | 09:16 PM
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The sending unit was the problem, when I changed it the oil guage was reading normal and looks great.
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Old Dec 31, 2011 | 12:26 PM
  #7  
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From: Bloodymore Murderland I am a Preacher of the Good news of JESUS CHRIST ,a Bad Actor ,Metal Bass play
Year: 1997
Model: Grand Cherokee (ZJ)
Engine: 4.0
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Mine is maxed out to. I have noticed many XJs in the bone yards with the same thing. So if you get an oil sender from the Bone yard should you make sure the oil gauge is to the left and not maxed out?????
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Old Dec 31, 2011 | 03:32 PM
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From: Bergen County, New Jersey U.S.A.
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correct
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Old Jan 2, 2012 | 08:10 AM
  #9  
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The thing i learned during this guage cluster swap was that there are two diffent oil sending units depending on the guage cluster you have. If you have the cluster with the gas guage where the tach should be and only oil, volts, and temp lights, the sending unit will need to be changed so it doesnt max out. jeep made two different ones depending on if you have oil light or guage.
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