what about a 90 model engine in a 94 ?

[NOS/86]

what needs to be changes ? we have a 94 trail only xj that dropped some parts out of the oil pan (lol) . we have a extra very good running 90 non-ho model motor . looking to try to swap this weekend .

i was going to take everything off the 94 ..then put it back on the 90 .

 

[Ghost]

what needs to be changes ? we have a 94 trail only xj that dropped some parts out of the oil pan (lol) . we have a extra very good running 90 non-ho model motor . looking to try to swap this weekend .

i was going to take everything off the 94 ..then put it back on the 90 .

I think the major changes from the 90 to the 94 are the head. You could just use the bottom end on the 90 and have the head of the HO.

 

[Shorty]

keep the intake manifold, exhaust manifold, flywheel/flex plate, and all sensors from the '94 and transfer them to the '90. Everything else should be "functionally equivalent"-- if the transmissions are both auto or both manual you shouldn't have trouble, but if one was stick make sure you get/remove the pilot bushing before changing flywheel/flexplate.

 

[NOS/86]

keep the intake manifold, exhaust manifold, flywheel/flex plate, and all sensors from the '94 and transfer them to the '90. Everything else should be "functionally equivalent"-- if the transmissions are both auto or both manual you shouldn't have trouble, but if one was stick make sure you get/remove the pilot bushing before changing flywheel/flexplate.

this is what i was thinking . thanks guys .

 

[huntingman2706217]

keep the intake manifold, exhaust manifold, flywheel/flex plate, and all sensors from the '94 and transfer them to the '90. Everything else should be "functionally equivalent"-- if the transmissions are both auto or both manual you shouldn't have trouble, but if one was stick make sure you get/remove the pilot bushing before changing flywheel/flexplate.

Will it run? Yes... will your exhaust and head ports line up? No... this would be a stupid swap...not only would u loose power from ports not lining up and everything breathing properly... you'll loose power by not running the ho... like swapping a ho in a renix... does no good if you don't change everything else... do it right... 91-99 motor only...

 

[NOS/86]

Will it run? Yes... will your exhaust and head ports line up? No... this would be a stupid swap...not only would u loose power from ports not lining up and everything breathing properly... you'll loose power by not running the ho... like swapping a ho in a renix... does no good if you don't change everything else... do it right... 91-99 motor only...

you giving me a 91-up motor ?? if not , moneys tight . got to use what you have sitting here . a very good running 90 model motor .

 

[huntingman2706217]

No I'm not giving u a motor... I'm giving u the road to common sense... its your Jeep... do what you want... u asked... and I answered...

 

[Team Willys]

If you just have bottom end issues then I would swap just the bottom end over and keep your 94 head and injection system. The renix head is garbage and you will notice a significant power loss by running the renix stuff.

 

[NOS/86]

If you just have bottom end issues then I would swap just the bottom end over and keep your 94 head and injection system. The renix head is garbage and you will notice a significant power loss by running the renix stuff.

i was thinking this too . motor in the xj has a new head on it . thanks