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XJ Ask the Question Thread
CF Veteran
Join Date: May 2011
Location: Glendale,Az
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Year: 1990
Model: Cherokee
Engine: 4.0l 6Cyl
Is taking off the fuel rail as simple as unbolting the few screws holding it down and pulling it out?
Id like to clean up the heat shield and paint it and would also like to change injector o rings while im at it.
Id like to clean up the heat shield and paint it and would also like to change injector o rings while im at it.
CF Veteran
Join Date: Jan 2013
Location: west chester, pa
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Year: 1999
Engine: 4.0
CF Veteran
Join Date: Sep 2010
Location: Mercer County, NJ
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Year: 2001
Model: Cherokee
Engine: 4.0L I6 HO
Dukie has an insanely good write up with pictures i the sticky section. If you haven't done so already, changes your injectors while you're there so as to kill 2 birds 1 stone
CF Veteran
Join Date: May 2011
Location: Glendale,Az
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Year: 1990
Model: Cherokee
Engine: 4.0l 6Cyl
Herp Derp Jerp
Join Date: Nov 2011
Location: Parham, ON
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Year: 1999
Model: Cherokee
Engine: 4.0L OBD-II
Be firm and patient in removing the rail.
At the bare minimum replace the O-rings. Since you have a Renix I'd be worried about the injector bodies cracking and leaking just by looking at them.
Moderator of Jeeps
Join Date: Jul 2011
Location: Frederick, MD from Cleveland, OH
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Year: 1993 YJ Wrangler
Engine: 4.0 I6
When removing the fuel Raul on a Renix, be very, VERY careful not to break the MAP line to the throttle body.
::CF Moderator::
Join Date: Aug 2011
Location: Prescott, Az
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Year: 1990
Model: Cherokee (XJ)
Engine: 4.0
XJ Cherokee and ZJ Grand Cherokee 4.0L engine blocks interchange.
2000+ TJ Wrangler and WJ Grand Cherokee 4.0L engine blocks interchange.
XJ/ZJ blocks and 2000+ TJ/WJ blocks do not interchange without significant modifications. (1991 to 1995 YJ and 1997-1999 4.0L TJ Wrangler blocks will interchange in XJ/ZJ and visa-versa).
TJ/WJ 4.0L Engine blocks underwent clean sheet design changes effective in the 1999 WJ Grand and 2000 TJ Wrangler. These blocks are not interchangeable with XJ/ZJ engine blocks. The reason is motor mount bolt holes and belt driven accessory mounting bolt holes are in different locations, or not present at all, TJ/WJ vs. XJ/ZJ.
XJ: "Regular" (not Grand) Cherokees 84-01
ZJ: Grand Cherokee 93-98 (Gen1)
WJ: Grand Cherokee 99-04 (Gen2)
YJ: Wrangler 87-95 (Gen1)
TJ: Wrangler 97-06 (Gen2)
2000+ TJ Wrangler and WJ Grand Cherokee 4.0L engine blocks interchange.
XJ/ZJ blocks and 2000+ TJ/WJ blocks do not interchange without significant modifications. (1991 to 1995 YJ and 1997-1999 4.0L TJ Wrangler blocks will interchange in XJ/ZJ and visa-versa).
TJ/WJ 4.0L Engine blocks underwent clean sheet design changes effective in the 1999 WJ Grand and 2000 TJ Wrangler. These blocks are not interchangeable with XJ/ZJ engine blocks. The reason is motor mount bolt holes and belt driven accessory mounting bolt holes are in different locations, or not present at all, TJ/WJ vs. XJ/ZJ.
XJ: "Regular" (not Grand) Cherokees 84-01
ZJ: Grand Cherokee 93-98 (Gen1)
WJ: Grand Cherokee 99-04 (Gen2)
YJ: Wrangler 87-95 (Gen1)
TJ: Wrangler 97-06 (Gen2)
Herp Derp Jerp
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Year: 1999
Model: Cherokee
Engine: 4.0L OBD-II
Up to 2001 XJ will work. Anything newer than 1996 will need you to figure out how to deal with the temperature gauge.
CF Veteran
Join Date: Feb 2013
Location: Justin, TEXAS
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Year: 1988
Model: Cherokee
Engine: 4.0
Can I run my gears without a pinion shim?
Reason I ask is cause when I have my backlash set right my drive pattern is way off to the toe end of the gears and my coast is way to the heel.
From what I've read that means I need to decrease pinion shim but I only have one shim in there now and it's the smallest I have
Reason I ask is cause when I have my backlash set right my drive pattern is way off to the toe end of the gears and my coast is way to the heel.
From what I've read that means I need to decrease pinion shim but I only have one shim in there now and it's the smallest I have
Junior Member
Join Date: Apr 2014
Location: Grand Rapids, MI
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Year: 2001
Model: Cherokee
Engine: 4.0L
Head Gasket?
Well, I think I ran into my first major problem, and I don't think I am going to like this one. My wife and I drove the XJ up North about 100 miles to her parents for the weekend. When we got out after the ride up there, I noticed my coolant was boiling. The engine temp was fine the whole way up. (When we got off the freeway, I did notice that it went to the next notch after 210 but the fan was on and it went back down quickly.)
Well, after the drive home, when I got off the freeway, it sat idle at the light and the temp rose again, but this time it suddenly jumped all the way up and the "check gauges" light came on. I pulled it into a parking lot and popped the hood. The coolant was boiling again and the engine bay seemed extremely hot. We were only a few miles from home so I let it sit for about 10 mins and then started it up, it started poorly and didn't idle very well for a minute, but then it evened out. On the way home it drove fine and the temp was just a tick over 210.
The oil pressure sat at around 50 most of the way home as well.
My first guess is that it needs a new head gasket. I am really hoping the head isn't cracked.
What do you guys think? Thanks.
Well, after the drive home, when I got off the freeway, it sat idle at the light and the temp rose again, but this time it suddenly jumped all the way up and the "check gauges" light came on. I pulled it into a parking lot and popped the hood. The coolant was boiling again and the engine bay seemed extremely hot. We were only a few miles from home so I let it sit for about 10 mins and then started it up, it started poorly and didn't idle very well for a minute, but then it evened out. On the way home it drove fine and the temp was just a tick over 210.
The oil pressure sat at around 50 most of the way home as well.
My first guess is that it needs a new head gasket. I am really hoping the head isn't cracked.
What do you guys think? Thanks.
CF Veteran
Join Date: Feb 2013
Location: Justin, TEXAS
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Year: 1988
Model: Cherokee
Engine: 4.0
Member
Join Date: Apr 2013
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Year: 1996
Model: Cherokee
Engine: 4.0
Well, I think I ran into my first major problem, and I don't think I am going to like this one. My wife and I drove the XJ up North about 100 miles to her parents for the weekend. When we got out after the ride up there, I noticed my coolant was boiling. The engine temp was fine the whole way up. (When we got off the freeway, I did notice that it went to the next notch after 210 but the fan was on and it went back down quickly.)
Well, after the drive home, when I got off the freeway, it sat idle at the light and the temp rose again, but this time it suddenly jumped all the way up and the "check gauges" light came on. I pulled it into a parking lot and popped the hood. The coolant was boiling again and the engine bay seemed extremely hot. We were only a few miles from home so I let it sit for about 10 mins and then started it up, it started poorly and didn't idle very well for a minute, but then it evened out. On the way home it drove fine and the temp was just a tick over 210.
The oil pressure sat at around 50 most of the way home as well.
My first guess is that it needs a new head gasket. I am really hoping the head isn't cracked.
What do you guys think? Thanks.
Well, after the drive home, when I got off the freeway, it sat idle at the light and the temp rose again, but this time it suddenly jumped all the way up and the "check gauges" light came on. I pulled it into a parking lot and popped the hood. The coolant was boiling again and the engine bay seemed extremely hot. We were only a few miles from home so I let it sit for about 10 mins and then started it up, it started poorly and didn't idle very well for a minute, but then it evened out. On the way home it drove fine and the temp was just a tick over 210.
The oil pressure sat at around 50 most of the way home as well.
My first guess is that it needs a new head gasket. I am really hoping the head isn't cracked.
What do you guys think? Thanks.