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4.0 H.O into a 90 XJ

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Old Jun 30, 2010 | 10:29 AM
  #16  
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From: Cary, NC
Year: 1993
Model: Grand Cherokee
Engine: 4.0
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I have seen bigger diffrents in big block Chevys.
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Old Jun 30, 2010 | 10:31 AM
  #17  
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Year: 1988 limited
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Originally Posted by 88chief
I have seen bigger diffrents in big block Chevys.
When you have 400+ displacement it doesn't care that much.
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Old Jun 30, 2010 | 11:28 AM
  #18  
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Question 1: it's still a full removal rebuild and reinstall to change just the block to an HO?
Question 2: do you still get the increase in power from 177 - 192 doing it that way.
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Old Jul 1, 2010 | 01:50 AM
  #19  
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From: Fontana, CA.
Year: 1990/2001
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Engine: 4.0
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Originally Posted by fantic238
option A: you keep the head of the old engine and swap only lhe block, no need to change wires.
option B: you swap the whole engine and you will need ECM + harness and complete exhaust (manifold, pipes etc. )
If I decide to go with option B, would I be able to still run the original tranny from my 90? The thing is that the donor vehicle is a 97 2WD Cherokee Sport, so I was thinking of using what ever I need for the swapt and part out the rest. Would it even be worth the trouble?
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Old Jul 1, 2010 | 02:08 AM
  #20  
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Year: 1988 limited
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Originally Posted by Johndoe
Question 1: it's still a full removal rebuild and reinstall to change just the block to an HO?
Question 2: do you still get the increase in power from 177 - 192 doing it that way.
Yes, No.
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Old Jul 1, 2010 | 02:19 AM
  #21  
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Year: 1988 limited
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Originally Posted by bajaxj
If I decide to go with option B, would I be able to still run the original tranny from my 90? The thing is that the donor vehicle is a 97 2WD Cherokee Sport, so I was thinking of using what ever I need for the swapt and part out the rest. Would it even be worth the trouble?
Of course, the tranny is a bolt on. The difficult part of a swap like this is the wires. You will need the entire engine harness, bulkhead connector and fuse box included, to do a clean job. We can help you out if you decide to do this. There is nothing you can't do when you have a wiring diagram, some help and a lot of patience.
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Old Jul 2, 2010 | 01:11 AM
  #22  
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From: Fontana, CA.
Year: 1990/2001
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Engine: 4.0
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Originally Posted by fantic238
Of course, the tranny is a bolt on. The difficult part of a swap like this is the wires. You will need the entire engine harness, bulkhead connector and fuse box included, to do a clean job. We can help you out if you decide to do this. There is nothing you can't do when you have a wiring diagram, some help and a lot of patience.

Thanks I appreciated. If I go that route I will be parting out the rest of the 97, the problem is where to do it.
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Old Jul 3, 2010 | 05:35 AM
  #23  
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From: Bloodymore Murderland I am a Preacher of the Good news of JESUS CHRIST ,a Bad Actor ,Metal Bass play
Year: 1997
Model: Grand Cherokee (ZJ)
Engine: 4.0
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Are all of the Cherokee 6bangers HO after 91, or does it have to say it on the body ?
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Old Jul 5, 2010 | 02:32 AM
  #24  
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Year: 1988 limited
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Originally Posted by BUELLIGAN
Are all of the Cherokee 6bangers HO after 91, or does it have to say it on the body ?
Yes.
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