oil pressure strange??
10-21-2009, 10:48 AM
#1
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Year: 1992
Model: Cherokee
Engine: 4.0 h/o
oil pressure strange??
when i start the ole jeep she runs about 40 pounds,then when she warms up she runs about 23-23 running and about 15-19 idling and its starting to scare me...it has over 300k miles would it be my pump going bad...how hard is this to replace and advice i super appreciated thanks guys
10-21-2009, 11:33 AM
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Year: 1992
Model: Cherokee
Engine: 4.0 h/o
different types as of right now i just did an oil change and i believe i put 5w 40 i think i was running a real heavy weight just for the fact of the high miles....should i run not so thick?
the motor runs like brand new no ticks knocks or anything just dunno whats up with the strange pressure changes
the motor runs like brand new no ticks knocks or anything just dunno whats up with the strange pressure changes
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10-21-2009, 12:57 PM
#8
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Year: 1989
Model: Cherokee
Engine: str8 6
sometimes you get junk build up in the pick up and it makes pressure funny I added some mystery marvel oil you add it right to oil run it for 2k miles hen change oil and watch out you will be surprised the ***** that comes out
10-21-2009, 10:20 PM
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Year: 1989
Model: Cherokee (XJ)
Engine: 4.7 H.O.
I would say, based on what you say, your oil is too thick. Wouldn't be a bad idea to follow the mystery oil instruction, you will be surprised by what comes out. I'm in a cold climate and run 5W-30 and it works like a pro.
10-22-2009, 11:36 AM
#12
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Year: 1992
Model: Cherokee
Engine: 4.0 h/o
well as for me and mystery oil my buddy used it on his ranger and it caused his motor to blow(but it was a ford) im just scared to use it because i have so many miles on this thing
whats your guys opinions
325,000+ miles
whats your guys opinions
325,000+ miles
10-22-2009, 11:42 AM
#14
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Year: 1997
Model: Cherokee
Engine: 4.0L
What year is it? Mine is a 97 and the sending units are POS. I've had two different ones and I get erratic readings. On a hot day it will have 10psi at idle...sometimes it will have 0...I just don't care anymore. It doesn't knock and I'm tired of buying $30 sensors to only fix if for a month. I run 10w30 and it has 150k on it. Going to 15w40 at next change.