1991 and 1989 4.0 engine swap

[SANDTRIBE]

I just purchased a 1991 xj and got a motor from a friend out of a 1989. My concern is that it won't work out ... anyone got any comments on this?? Thanks

 

[cruiser54]

It will work. Just use the intake and exhaust manifolds, flywheel/flexplate, possibly valve cover, distributor, various brackets fo raC/alternator, and all sensors from the 91. Be sure to use the intake/exhaust gaskte from the 91 for the swap. Any questions when you get into it, post them up.

 

[ROBZ95Xj]

intake ports are diff, swap heads

 

[Gold Digger]

It will work. Just use the intake and exhaust manifolds, flywheel/flexplate, possibly valve cover, distributor, various brackets fo raC/alternator, and all sensors from the 91. Be sure to use the intake/exhaust gaskte from the 91 for the swap. Any questions when you get into it, post them up.

One thing I will suggest is check that exhaust manifold. XJ's have a very common problem of them cracking by the flange. I swapped out my motor in my '90 and I was suprised that the manifold was still in one peice! Jeep did come out with an updated one that can take more stress in those areas or you could just weld if back up. It's your call. Good luck to you! Take pics when she's done

 

[SANDTRIBE]

Thanks for all the imput I'm sure ill have questions and pics thanks again