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Old Nov 20, 2011 | 01:20 PM
  #8041  
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Default Engine swap in a 1990 manual trans Cherokee...

Hi,
Just bought a 1990 2 door Cherokee, 5 speed with a bad engine. (noisy bearings, low compression, etc.) Planning on finding a serviceable used engine to run while I take my time and do a thorough rebuild on the original engine. I believe that the 1988 to 1990 engines are identical, but do I need to find a manual transmission engine, or can the manual flywheel just bolt on to the crankshaft on an automatic engine? The automatics are a lot easier to find...
Thanks!
Tom
Old Nov 20, 2011 | 01:25 PM
  #8042  
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From: Hutchinson Ks
Year: 1997
Model: Cherokee
Engine: 4.0
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Originally Posted by tkent02
Hi,
Just bought a 1990 2 door Cherokee, 5 speed with a bad engine. (noisy bearings, low compression, etc.) Planning on finding a serviceable used engine to run while I take my time and do a thorough rebuild on the original engine. I believe that the 1988 to 1990 engines are identical, but do I need to find a manual transmission engine, or can the manual flywheel just bolt on to the crankshaft on an automatic engine? The automatics are a lot easier to find...
Thanks!
Tom
You shouldn't have any issues. Your flywheel will bolt to the crank.
Old Nov 20, 2011 | 01:27 PM
  #8043  
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Originally Posted by bsmith97xj
You shouldn't have any issues. Your flywheel will bolt to the crank.
OK, thanks! Are there any other differences, and am I correct that I need to find a 1988 to 1990 engine?
Old Nov 20, 2011 | 02:00 PM
  #8044  
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From: Rocket Country MI
Year: 1999
Model: Cherokee
Engine: 4.0
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Ok so one of the A auto places near me has these 2 in drop shackles for chevy trucks that just happen to be just about the same sizes i'd need on my rig if i were to flip them to use for lift shackles
question is has anyone used these chevy drop shackles as xj lift shackles??
Old Nov 20, 2011 | 06:02 PM
  #8045  
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From: Summerville, South Carolina
Year: 99
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Previous owners removed 4WD shaft in my 89 limited and never said why. What's most likely my problem?
Old Nov 20, 2011 | 06:24 PM
  #8046  
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From: Murray, UT
Year: 1999
Model: Cherokee
Engine: 4.0 I6
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Saving weight to get better mpg in the summer? Or tcase won't disengage, or front and rear axles geared differently. Couple possibilities. Highly doubt the last one, though. I'd bet on my first example.
Old Nov 20, 2011 | 06:27 PM
  #8047  
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Originally Posted by 89XJDan
Saving weight to get better mpg in the summer? Or tcase won't disengage, or front and rear axles geared differently. Couple possibilities. Highly doubt the last one, though. I'd bet on my first example.
Saving weight? Never heard of that. But should I just get a new shaft and throw it in there and see what happens? Or is there a chance bad things could happen if something's broke?
Old Nov 20, 2011 | 07:21 PM
  #8048  
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From: Jacksonville Beach
Year: 1997
Model: Cherokee
Engine: 4.0 AMC
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Snag one from a junkyard, at least you'll have one and find out what to get next.
Old Nov 20, 2011 | 07:24 PM
  #8049  
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Originally Posted by Domaha
Snag one from a junkyard, at least you'll have one and find out what to get next.
Ya but like, if I put it in there and drive it and there is something wrong with the tcase or different gearing what would happen?
Old Nov 20, 2011 | 07:42 PM
  #8050  
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From: JAX BCH, FL
Year: 1997
Model: Cherokee
Engine: 4.0 Ltr AMC
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Originally Posted by zombie jeep101

Ya but like, if I put it in there and drive it and there is something wrong with the tcase or different gearing what would happen?
Clanking, grinding, breaking... anything's possible. Definitely have a mechanic check it out first, dude took it off for a reason.
Old Nov 20, 2011 | 07:51 PM
  #8051  
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Originally Posted by XJdahmDom

Clanking, grinding, breaking... anything's possible. Definitely have a mechanic check it out first, dude took it off for a reason.
-,- I hate that sentence... "Get a mechanic to _____! "
Old Nov 20, 2011 | 08:51 PM
  #8052  
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Got a 98 cherokee... winter started in MN yesterday with a bit of snow. I used the 4 wheel drive for the first time since last winter (and the first time since new shocks) I noticed twice that when I was turning and moving I got a strange rattle/creaking noise coming from the front end. There also seems to be a little vibration. This problem is not present when I am in just 2wd. I haven't checked it out much since then due to work... anything you guys know I should check with this issue?
Old Nov 20, 2011 | 09:06 PM
  #8053  
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From: Mercer County, NJ
Year: 2001
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Engine: 4.0L I6 HO
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Originally Posted by elbarto
Got a 98 cherokee... winter started in MN yesterday with a bit of snow. I used the 4 wheel drive for the first time since last winter (and the first time since new shocks) I noticed twice that when I was turning and moving I got a strange rattle/creaking noise coming from the front end. There also seems to be a little vibration. This problem is not present when I am in just 2wd. I haven't checked it out much since then due to work... anything you guys know I should check with this issue?
You can check the front drive shaft if anything make sure it isn't loose etc
Old Nov 20, 2011 | 10:15 PM
  #8054  
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Sea foam. You dump
Half in the throttle body while it's running and then cut it off, let it sit for 15mins and put the intake back over it then start right?? And the other half just gets dumped straight onto the gas tank and sits there??
Old Nov 20, 2011 | 11:50 PM
  #8055  
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From: Mercer County, NJ
Year: 2001
Model: Cherokee
Engine: 4.0L I6 HO
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Originally Posted by zombie jeep101
Sea foam. You dump
Half in the throttle body while it's running and then cut it off, let it sit for 15mins and put the intake back over it then start right?? And the other half just gets dumped straight onto the gas tank and sits there??
Check the link on my sig. Dumb it into the brake booster lil at a time then dump alot to stall her out. A full can goes into gas when it's low.



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