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milessthomas 01-18-2009 08:26 PM

Jeep Engine Question
 
Okay I've got a 1991 cherokee with a rebuilt 4.0L L6.

I've also got a 1999 Grand Cherokee.

I want to put the rebuilt engine from the cherokee into the Grand Cherokee.

The 91 cherokee transfer case is busted and I don't want to deal with it, are the 1999 4.0L engines and the 1991 4.0L engines interchangeable?

dtx 01-18-2009 08:31 PM

Jeep Forum - Jeep Enthusiast Network

probably will be more helpful.

milessthomas 01-18-2009 08:32 PM

Well, just asking here cause its not really important right away and we have a bunch of mechanics here I've talked to.

Thank you though dtx I'll check it out.

XJ-linux 01-18-2009 10:21 PM

Significant changes came about with the 1996 4.0L. You may wish to consider coring out the 1990 engine on a rebuilt 1999 4.0L. You will also need a new wiring system (with an early 1990's engine) as the injection, timing and induction systems are different as well. The components themselves would probably bolt up with some adaptors though.

milessthomas 01-19-2009 03:34 PM

Quote:

Originally Posted by XJ-linux (Post 789983)
Significant changes came about with the 1996 4.0L. You may wish to consider coring out the 1990 engine on a rebuilt 1999 4.0L. You will also need a new wiring system (with an early 1990's engine) as the injection, timing and induction systems are different as well. The components themselves would probably bolt up with some adaptors though.

Great Info XJ-linux. Much appreciated.

XJ-linux 01-19-2009 04:24 PM

LOL, the XJ in XJ-linux means Jeep XJ Cherokee :)

Derek McNelly 01-19-2009 04:28 PM

Quote:

Originally Posted by XJ-linux (Post 790346)
LOL, the XJ in XJ-linux means Jeep XJ Cherokee :)

What's your opinion on the MJ?

Dysfunction 01-19-2009 04:31 PM

MJ? Same thing, but a pickup bed ;)


I really liked my old XJ, till I tore the unibody.

XJ-linux 01-19-2009 05:48 PM

I should change my name to JK-linux now as I traded the XJ for a JK when I moved to Minnesota. My only complaint is the lack of the I6 4.0 on the JK. The 3.8L is a minivan engine that just lacks the grunt of the old reliable I6.

milessthomas 01-19-2009 10:45 PM

Quote:

Originally Posted by XJ-linux (Post 790346)
LOL, the XJ in XJ-linux means Jeep XJ Cherokee :)

I got that one...

My license plate is "Jeep - XJ"


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