Higher than normal oil pressure
Thread Starter
Member
Joined: Jun 2012
Posts: 170
Likes: 0
From: Culpeper, VA
Year: 1999
Model: Cherokee
Engine: 4.0L H.O.
I noticed the other day that my oil pressure is higher than normal. It seems to drive fine, and sounds normal, but my range used to be idle at 20-25, and run around 55-60 at highway speeds. Now it is idle at 45-50, running at 80 on the highway.
Should I be worried? What should I do?
Should I be worried? What should I do?
Member
Joined: Sep 2009
Posts: 152
Likes: 0
Year: 1990 , 1997 ,1997, 2000
Model: Cherokee
Engine: 4.0 @5.2
I noticed the other day that my oil pressure is higher than normal. It seems to drive fine, and sounds normal, but my range used to be idle at 20-25, and run around 55-60 at highway speeds. Now it is idle at 45-50, running at 80 on the highway.
Should I be worried? What should I do?
Should I be worried? What should I do?
Thread Starter
Member
Joined: Jun 2012
Posts: 170
Likes: 0
From: Culpeper, VA
Year: 1999
Model: Cherokee
Engine: 4.0L H.O.
Check your oil, see what color it is, and if it overfilled ?/ Also watch your coolant levels.. I hate to say it but it sounds like it might be the start of a head gasket or cracked head?? These were the first symptons we had on ours?? If it is., my advice would be to stop driving it so you do not cause further damage?? If the oil is contaminated with anti freeze it will wipe out the bearings and rings and cause more expensive damage if that is the case..
Thanks
CF Veteran
Joined: Sep 2011
Posts: 4,172
Likes: 4
From: Riviera, Texas
Year: 1998 Sport
Model: Cherokee
Engine: 4.0
Start by verifying the pressure with a mechanical pressure gauge. More then likely you oil pressure sending unit is starting to go bad. When they go out they usually read high.
Thread Starter
Member
Joined: Jun 2012
Posts: 170
Likes: 0
From: Culpeper, VA
Year: 1999
Model: Cherokee
Engine: 4.0L H.O.
Any pointers on where to get one and how to do it? I'm not good with the internals of engines.
CF Veteran
Joined: Sep 2011
Posts: 4,172
Likes: 4
From: Riviera, Texas
Year: 1998 Sport
Model: Cherokee
Engine: 4.0
You can rent a mechanical pressure gauge at any autozone type of parts store. Just remove the oil pressure sending unit. located just above the oil filter and replace the sending unit with the gauge. If it reads at what your oil pressure was then you will need to replace the sending unit. When buying a new one get it from the dealer. They are more accurate the a after market brands.
Senior Member




Joined: May 2012
Posts: 602
Likes: 13
From: Salt Lake City, UT
Year: 1998
Model: Cherokee (XJ)
Engine: 4.0
Since you just had the oil changed, it's likely that when they changed the filter they bumped the oil pressure sending unit. They are prone to breaking that way.
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