91 Jeep Cherokee 4.0 engine transplant.
 

Hi all. I have a quick question. I need to replace the 4.0 in my 91
Cherokee. I would like to know, will a 4.0 engine from a 92 Cherokee
work. I have located a 4.0 out of a 92 Jeep, but the people I am
dealing with do not seem to think the 92 engine will work in my 91?
Any help would be greatly appreciated.
Thanks: Alvin

Re: 91 Jeep Cherokee 4.0 engine transplant.
 

You missed the '87 to '90 frog injection, so I think you'll be all
right.
God Bless America, Bill O|||||||O
mailto:-------------------- http://www.----------.com/

obby wrote:
>
> Hi all. I have a quick question. I need to replace the 4.0 in my 91
> Cherokee. I would like to know, will a 4.0 engine from a 92 Cherokee
> work. I have located a 4.0 out of a 92 Jeep, but the people I am
> dealing with do not seem to think the 92 engine will work in my 91?
> Any help would be greatly appreciated.
> Thanks: Alvin

Re: 91 Jeep Cherokee 4.0 engine transplant.
 

You missed the '87 to '90 frog injection, so I think you'll be all
right.
God Bless America, Bill O|||||||O
mailto:-------------------- http://www.----------.com/

obby wrote:
>
> Hi all. I have a quick question. I need to replace the 4.0 in my 91
> Cherokee. I would like to know, will a 4.0 engine from a 92 Cherokee
> work. I have located a 4.0 out of a 92 Jeep, but the people I am
> dealing with do not seem to think the 92 engine will work in my 91?
> Any help would be greatly appreciated.
> Thanks: Alvin

Re: 91 Jeep Cherokee 4.0 engine transplant.
 

You missed the '87 to '90 frog injection, so I think you'll be all
right.
God Bless America, Bill O|||||||O
mailto:-------------------- http://www.----------.com/

obby wrote:
>
> Hi all. I have a quick question. I need to replace the 4.0 in my 91
> Cherokee. I would like to know, will a 4.0 engine from a 92 Cherokee
> work. I have located a 4.0 out of a 92 Jeep, but the people I am
> dealing with do not seem to think the 92 engine will work in my 91?
> Any help would be greatly appreciated.
> Thanks: Alvin

Re: 91 Jeep Cherokee 4.0 engine transplant.
 

L.W.(Bill) ------ III wrote:
> You missed the '87 to '90 frog injection, so I think you'll be all
> right.

Hard to say, the cross says 84-91 on the shortblock. I'd be checking
every bit and the mount positions. :/

> obby wrote:
>>
>> Hi all. I have a quick question. I need to replace the 4.0 in my 91
>> Cherokee. I would like to know, will a 4.0 engine from a 92 Cherokee
>> work. I have located a 4.0 out of a 92 Jeep, but the people I am
>> dealing with do not seem to think the 92 engine will work in my 91?
>> Any help would be greatly appreciated.
>> Thanks: Alvin

Re: 91 Jeep Cherokee 4.0 engine transplant.
 

L.W.(Bill) ------ III wrote:
> You missed the '87 to '90 frog injection, so I think you'll be all
> right.

Hard to say, the cross says 84-91 on the shortblock. I'd be checking
every bit and the mount positions. :/

> obby wrote:
>>
>> Hi all. I have a quick question. I need to replace the 4.0 in my 91
>> Cherokee. I would like to know, will a 4.0 engine from a 92 Cherokee
>> work. I have located a 4.0 out of a 92 Jeep, but the people I am
>> dealing with do not seem to think the 92 engine will work in my 91?
>> Any help would be greatly appreciated.
>> Thanks: Alvin

Re: 91 Jeep Cherokee 4.0 engine transplant.
 

L.W.(Bill) ------ III wrote:
> You missed the '87 to '90 frog injection, so I think you'll be all
> right.

Hard to say, the cross says 84-91 on the shortblock. I'd be checking
every bit and the mount positions. :/

> obby wrote:
>>
>> Hi all. I have a quick question. I need to replace the 4.0 in my 91
>> Cherokee. I would like to know, will a 4.0 engine from a 92 Cherokee
>> work. I have located a 4.0 out of a 92 Jeep, but the people I am
>> dealing with do not seem to think the 92 engine will work in my 91?
>> Any help would be greatly appreciated.
>> Thanks: Alvin

Re: 91 Jeep Cherokee 4.0 engine transplant.
 

DougW wrote:
> L.W.(Bill) ------ III wrote:
>
>> You missed the '87 to '90 frog injection, so I think you'll be all
>>right.
>
>
> Hard to say, the cross says 84-91 on the shortblock. I'd be checking
> every bit and the mount positions. :/

More than likely the only changes are some new bosses cast into the
block for attaching accessories.

I've never heard of anyone having any major issues bolting an HO into a
non-HO or for that matter Renix based injection (french as Bill alluded
to) older 4.0 being replaced with the newest 4.0's...

Differences include intakes with bosses for brackets what don't line up
with older brackets (just drill new hols or use newer brackets), a
coolant temp sensor bung that was relocated on the newer head castings
(93 and newer I believe). The old bung is still there only capped by a
bolt, which when removed allows the old coolant sensor to work. A newer
(post 97) intake design (rounded runners) that flows somewhat better
than the old square ones but still bolts up to older heads. and lots of
minor BS mounting point relocations that don't matter a damn bit as long
as you get the engine complete with those parts.

Basically nothing that can't be overcome with a drill, a welder and a
small amount of modification. And not even that much if you get a
complete engine.

--
Simon
"I may be wrong, but I'm not uncertain." -- Robert A. Heinlein

Re: 91 Jeep Cherokee 4.0 engine transplant.
 

DougW wrote:
> L.W.(Bill) ------ III wrote:
>
>> You missed the '87 to '90 frog injection, so I think you'll be all
>>right.
>
>
> Hard to say, the cross says 84-91 on the shortblock. I'd be checking
> every bit and the mount positions. :/

More than likely the only changes are some new bosses cast into the
block for attaching accessories.

I've never heard of anyone having any major issues bolting an HO into a
non-HO or for that matter Renix based injection (french as Bill alluded
to) older 4.0 being replaced with the newest 4.0's...

Differences include intakes with bosses for brackets what don't line up
with older brackets (just drill new hols or use newer brackets), a
coolant temp sensor bung that was relocated on the newer head castings
(93 and newer I believe). The old bung is still there only capped by a
bolt, which when removed allows the old coolant sensor to work. A newer
(post 97) intake design (rounded runners) that flows somewhat better
than the old square ones but still bolts up to older heads. and lots of
minor BS mounting point relocations that don't matter a damn bit as long
as you get the engine complete with those parts.

Basically nothing that can't be overcome with a drill, a welder and a
small amount of modification. And not even that much if you get a
complete engine.

--
Simon
"I may be wrong, but I'm not uncertain." -- Robert A. Heinlein

Re: 91 Jeep Cherokee 4.0 engine transplant.
 

DougW wrote:
> L.W.(Bill) ------ III wrote:
>
>> You missed the '87 to '90 frog injection, so I think you'll be all
>>right.
>
>
> Hard to say, the cross says 84-91 on the shortblock. I'd be checking
> every bit and the mount positions. :/

More than likely the only changes are some new bosses cast into the
block for attaching accessories.

I've never heard of anyone having any major issues bolting an HO into a
non-HO or for that matter Renix based injection (french as Bill alluded
to) older 4.0 being replaced with the newest 4.0's...

Differences include intakes with bosses for brackets what don't line up
with older brackets (just drill new hols or use newer brackets), a
coolant temp sensor bung that was relocated on the newer head castings
(93 and newer I believe). The old bung is still there only capped by a
bolt, which when removed allows the old coolant sensor to work. A newer
(post 97) intake design (rounded runners) that flows somewhat better
than the old square ones but still bolts up to older heads. and lots of
minor BS mounting point relocations that don't matter a damn bit as long
as you get the engine complete with those parts.

Basically nothing that can't be overcome with a drill, a welder and a
small amount of modification. And not even that much if you get a
complete engine.

--
Simon
"I may be wrong, but I'm not uncertain." -- Robert A. Heinlein