4.0 Swap
07-30-2016, 04:44 PM
#1
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Year: 1999
Model: Cherokee
Engine: 2.5L
4.0 Swap
Hey guys,
Recently bought a 99 xj with a 2.5 that has some head issues (leaking coolant into the motor somehwere) I've dealt with similar problems on different vehicles and know how much of a PITA it is to deal with. I found some 99 4.0s that would financially be a better deal than fixing my 2.5, so...
I was wondering if anyone has any insight on swapping a 4.0 into the 2.5 xjs, ie is it equally a pain? Are the 4.0s compatible with the 2.5 engine mounts, trans, etc?
I'm just on an information hunt right now as I haven't found too much so far, so any and all info is greatly appreciated!
Recently bought a 99 xj with a 2.5 that has some head issues (leaking coolant into the motor somehwere) I've dealt with similar problems on different vehicles and know how much of a PITA it is to deal with. I found some 99 4.0s that would financially be a better deal than fixing my 2.5, so...
I was wondering if anyone has any insight on swapping a 4.0 into the 2.5 xjs, ie is it equally a pain? Are the 4.0s compatible with the 2.5 engine mounts, trans, etc?
I'm just on an information hunt right now as I haven't found too much so far, so any and all info is greatly appreciated!
07-30-2016, 07:32 PM
#2
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Join Date: Aug 2011
Location: Nor-Cal Coast
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Year: 90,84
Model: Cherokee
Engine: 4.0,2.5
The motor and trans is sort of "married" to the puter'. The puter is sort of "married" to the rest of the Jeep. Idk about physically fitting a 4.0 where a 2.5 was, but that would just be a beginning.
Long ago my 84 W/2.5, head cracked. Found another head, lapped the valves and installed. All good! Didn't cost much more than the gasket set. Still drives fine right now, but has been non-oped 10 years since I got a jeep with a 4.0.
Long ago my 84 W/2.5, head cracked. Found another head, lapped the valves and installed. All good! Didn't cost much more than the gasket set. Still drives fine right now, but has been non-oped 10 years since I got a jeep with a 4.0.
07-31-2016, 09:51 AM
#4
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Year: 1999
Model: Cherokee
Engine: 4.0
Hopefully crusier54 or ccken will answer your question as I'm sure they will know all the details of the swap other than the ones listed above.
08-01-2016, 08:06 AM
#5
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Join Date: Aug 2011
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Year: 1990
Model: Cherokee (XJ)
Engine: 4.0
It's a lot of work. Bell housing pattern is different. So, a different trans.
Not for the faint of heart.
Not for the faint of heart.
