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View Full Version : Since my motor is bad.....

old88xj
July 30th, 2003, 16:30
I have a 88 XJ 115K 4.0 auto with a bad motor. My question is will a 4.0 I6 motor from a Grand cherokee fit in my heep? My motor has a great head but bad main and rod bearings and a scarred crank, with some minor blow by. The Grand motor has good bottom half but a cracked head. I am thinking of buying a head from Advanced Auto and swapping motors. I believe they are the same motor but will they swap out? OR am i just asking for more trouble? HELP is greatly appriecated! THanks in advance


Daniel
i got a broke XJ
need help fixin
so i can get to wheelin
eric91xj
July 30th, 2003, 17:16
swapping blocks will give you no trouble at all, it should bolt right up. the new blocks still as cast for the knock sensor too.

eric
old88xj
July 30th, 2003, 18:19
so even though the motor is 10 years newer and for a diff model it will still fit? Old(cherokee) Head to New(grand) block?
eric91xj
July 30th, 2003, 18:43
yup, only things i'm aware of is a few of the cooling passages might have to be blocked off because of the different heads, but its nothing to shy away from, not a big deal at all.

eric
old88xj
July 31st, 2003, 17:12
Hmmm ........interesting! Any other thoughts or opinions fellow jeepers??
Centrevillemx
July 31st, 2003, 17:28
Yea I got an opinion: a 350 chev. conversion 300+ hp stock
XJ91
July 31st, 2003, 17:38
The computer would have to come from the Grand also.
eric91xj
July 31st, 2003, 18:19
he does'nt need the computer, he's still using his old head and intake manifold and all electronics
old88xj
August 1st, 2003, 04:16
i like that idea CENTREVILLE but that takes a little more $$$ than i got.