Oil pump help
02-09-2020 | 09:19 AM
#16
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Joined: Aug 2011
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From: Prescott, Az
Year: 1990
Model: Cherokee (XJ)
Engine: 4.0
To be frank with you not a clue. Been meaning to ask my friend about this.
Been reading these threads lately.
Most of it is here:
https://www.cherokeeforum.com/f67/3-...ng-oil-255577/
Been reading these threads lately.
Most of it is here:
https://www.cherokeeforum.com/f67/3-...ng-oil-255577/
If you want to learn beforehand, peruse the FSM to see how easy these engines are compared to Detroit Iron. too many myths are applied to the 4.0 that they don't deserve.
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Tgramsey (02-09-2020)
02-09-2020 | 09:22 AM
#17
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Year: 2000
Model: Cherokee (XJ)
So all that stuff in Post #4 is unnecessary?
02-09-2020 | 01:58 PM
#19
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From: Los Angeles
Year: 1992
Model: Cherokee (XJ)
Just disconnect the Crank Positioning sensor huh.
Easy peasy huh. Thanks for that.
Been thinking about building an engine, well really my friend will handle most of the heavy lifting but I will be involved, and been trying to educate myself about pre-oiling an engine and
all the preload stuff with rocker/lifters/whatnot I have been reading about lately.
Easy peasy huh. Thanks for that.
Been thinking about building an engine, well really my friend will handle most of the heavy lifting but I will be involved, and been trying to educate myself about pre-oiling an engine and
all the preload stuff with rocker/lifters/whatnot I have been reading about lately.
02-09-2020 | 02:03 PM
#20
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02-09-2020 | 02:36 PM
#22
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From: Los Angeles
Year: 1992
Model: Cherokee (XJ)
02-09-2020 | 03:41 PM
#24
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From: syracuse ny
Year: 1997
Model: Grand Cherokee (ZJ)
Engine: 4.0, new lifters valve job with new springs and exhaust valves, preload set with shims
02-09-2020 | 04:03 PM
#26
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Joined: Dec 2019
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From: Los Angeles
Year: 1992
Model: Cherokee (XJ)
02-09-2020 | 04:04 PM
#27
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From: syracuse ny
Year: 1997
Model: Grand Cherokee (ZJ)
Engine: 4.0, new lifters valve job with new springs and exhaust valves, preload set with shims
So much for Dave nominating my post for a sticky then. But I fail to see how these lifters aren't affected by preload. CCKen seemed to think so also.
02-09-2020 | 04:58 PM
#28
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Joined: Aug 2011
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From: Prescott, Az
Year: 1990
Model: Cherokee (XJ)
Engine: 4.0
02-09-2020 | 05:29 PM
#29
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Joined: Mar 2016
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Year: 96
Model: Cherokee (XJ)
Engine: 4.0
My question would arise at what point you would not re-use the old one, but obtain a new pump (in a rebuild or major overhaul).
I presume an OEM oil pump is no longer available?
02-09-2020 | 05:33 PM
#30
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From: Prescott, Az
Year: 1990
Model: Cherokee (XJ)
Engine: 4.0
I don't know if the OEMs are available or not. Aftermarket, with POSSIBLY the exception being Melling, are likely off shore junk made of inferior materials and sketchy engineering.