oil pressure problem
#31
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Year: 2004
Model: Grand Cherokee
Engine: 2000 4.0
The problem is for newcomers who see your post saying your 2000 has had zero at idle when it actually isn't zero but "near zero" and up to 4 psi. I know you've posted this before and every one (except newbies) knows your Jeep isn't running on zero oil pressure but why say so?
#32
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Year: 1993
Model: Cherokee
Engine: 4.0L
I'm just being lazy. I always have to dig back through the thread to see what your pressure actually is. With this exchange maybe I'll remember although I wouldn't count on it.
#34
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Year: 2004
Model: Grand Cherokee
Engine: 2000 4.0
Oh yes I DO! Engine date code is 009MX27 It amazes me that so many 2000 & 2001 engines have oil pressure issues. Some are related to the 0331 head but many more are unexplained. Even after complete rebuilds some of these year engines still had low pressure. No one has pinpointed an exact cause. I have heard everything from bad lifter bores to leaky oil galleries due to porous block castings or incorrect cross-drilling. Whatever the cause it has not proven to be too catastrophic as MANY 4.0 have ran a long time with this issue.
#36
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Year: 2001
Model: Cherokee
Engine: 4.0
Cracked Head?
Last edited by mtulett1; 07-13-2014 at 09:08 AM.
#37
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Year: 2004
Model: Grand Cherokee
Engine: 2000 4.0
I have said many times that I have a 2004 with a 2000 SALVAGE engine. It was swapped out by a dealer at 40k miles and sent to auction for reasons unknown, possibly to satisfy a custom complaint of low oil pressure! Anyway, it now has 113k and is still running strong.
#39
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#40
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Year: 2004
Model: Grand Cherokee
Engine: 2000 4.0
Google "Blackstone Labs" No, not unless you see the crack under the valve cover but you will have to pull the head anyway. Confirm test results first. Mine was losing coolant too and it turned out just to be a bad water pump so you never know!
#41
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Year: 2001
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thanks again
#42
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Year: 1999
Model: Cherokee
Engine: 4.0L OBD-II
I guess I don't read enough of your posts then
#43
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Read: https://www.cherokeeforum.com/showthread.php?t=118922
I guess I don't read enough of your posts then
I guess I don't read enough of your posts then
#45
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Year: 2001
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Engine: 4.0