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 |
Re: 91 Jeep Cherokee 4.0 engine transplant.
Lots of folks have posted about swapping the different years with
success. Mike 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00 88 Cherokee 235 BFG AT's Canadian Off Road Trips Photos: Non members can still view! Jan/06 http://www.imagestation.com/album/pi...?id=2115147590 (More Off Road album links at bottom of the view page) Simon Juncal wrote: > > 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.
Lots of folks have posted about swapping the different years with
success. Mike 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00 88 Cherokee 235 BFG AT's Canadian Off Road Trips Photos: Non members can still view! Jan/06 http://www.imagestation.com/album/pi...?id=2115147590 (More Off Road album links at bottom of the view page) Simon Juncal wrote: > > 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.
Lots of folks have posted about swapping the different years with
success. Mike 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00 88 Cherokee 235 BFG AT's Canadian Off Road Trips Photos: Non members can still view! Jan/06 http://www.imagestation.com/album/pi...?id=2115147590 (More Off Road album links at bottom of the view page) Simon Juncal wrote: > > 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.
Biggest problem with a swap between the HO and earlier 4.0's is the
head - the manifolds are NOT interchangeable between the two heads. On Sun, 1 Oct 2006 14:33:41 UTC Simon Juncal <SPAMERSSUCK@usefirstinitialandlastnameATerols.com > wrote: > 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. > -- Will Honea |
Re: 91 Jeep Cherokee 4.0 engine transplant.
Biggest problem with a swap between the HO and earlier 4.0's is the
head - the manifolds are NOT interchangeable between the two heads. On Sun, 1 Oct 2006 14:33:41 UTC Simon Juncal <SPAMERSSUCK@usefirstinitialandlastnameATerols.com > wrote: > 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. > -- Will Honea |
Re: 91 Jeep Cherokee 4.0 engine transplant.
Biggest problem with a swap between the HO and earlier 4.0's is the
head - the manifolds are NOT interchangeable between the two heads. On Sun, 1 Oct 2006 14:33:41 UTC Simon Juncal <SPAMERSSUCK@usefirstinitialandlastnameATerols.com > wrote: > 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. > -- Will Honea |
Re: 91 Jeep Cherokee 4.0 engine transplant.
Will Honea wrote:
> Biggest problem with a swap between the HO and earlier 4.0's is the > head - the manifolds are NOT interchangeable between the two heads. I'm not sure which manifold you're talking about... the exhuast manifold changed but the port pattern is the same so it's just a matter of swaping manifolds, or fab'ing or buying a new collector pipe, and modifiying brackets for clearance. The intake manifold also has the same port pattern and is 100% interchangable from Renix to non-HO mopar MPI, to HO, to even the newest intake (99 and up rounded runners). In fact you can even use an old 4.2L carbureted 2bbl intake manifold on a 7120 or 0630 head. Those are both HO "high port" heads without the 0331 head's penchant for cracking. Again this might require some minor drilling, grinding, maybe even some welding to get workable brackets and power steering but if you're doing an engine swap and the thought of drilling, grinding and welding scares you then you probably ought re-think doing it. :) -- Simon "I may be wrong, but I'm not uncertain." -- Robert A. Heinlein |
Re: 91 Jeep Cherokee 4.0 engine transplant.
Will Honea wrote:
> Biggest problem with a swap between the HO and earlier 4.0's is the > head - the manifolds are NOT interchangeable between the two heads. I'm not sure which manifold you're talking about... the exhuast manifold changed but the port pattern is the same so it's just a matter of swaping manifolds, or fab'ing or buying a new collector pipe, and modifiying brackets for clearance. The intake manifold also has the same port pattern and is 100% interchangable from Renix to non-HO mopar MPI, to HO, to even the newest intake (99 and up rounded runners). In fact you can even use an old 4.2L carbureted 2bbl intake manifold on a 7120 or 0630 head. Those are both HO "high port" heads without the 0331 head's penchant for cracking. Again this might require some minor drilling, grinding, maybe even some welding to get workable brackets and power steering but if you're doing an engine swap and the thought of drilling, grinding and welding scares you then you probably ought re-think doing it. :) -- Simon "I may be wrong, but I'm not uncertain." -- Robert A. Heinlein |
Re: 91 Jeep Cherokee 4.0 engine transplant.
Will Honea wrote:
> Biggest problem with a swap between the HO and earlier 4.0's is the > head - the manifolds are NOT interchangeable between the two heads. I'm not sure which manifold you're talking about... the exhuast manifold changed but the port pattern is the same so it's just a matter of swaping manifolds, or fab'ing or buying a new collector pipe, and modifiying brackets for clearance. The intake manifold also has the same port pattern and is 100% interchangable from Renix to non-HO mopar MPI, to HO, to even the newest intake (99 and up rounded runners). In fact you can even use an old 4.2L carbureted 2bbl intake manifold on a 7120 or 0630 head. Those are both HO "high port" heads without the 0331 head's penchant for cracking. Again this might require some minor drilling, grinding, maybe even some welding to get workable brackets and power steering but if you're doing an engine swap and the thought of drilling, grinding and welding scares you then you probably ought re-think doing it. :) -- Simon "I may be wrong, but I'm not uncertain." -- Robert A. Heinlein |
Re: 91 Jeep Cherokee 4.0 engine transplant.
You may bolt an older exhaust on to the 4.0 liter, but the 258 CID
carburetor manifold will not match the ports: http://www.----------.com/temp/258vs4LPorts.jpg God Bless America, Bill O|||||||O mailto:-------------------- Simon Juncal wrote: > > I'm not sure which manifold you're talking about... the exhuast manifold > changed but the port pattern is the same so it's just a matter of > swaping manifolds, or fab'ing or buying a new collector pipe, and > modifiying brackets for clearance. The intake manifold also has the same > port pattern and is 100% interchangable from Renix to non-HO mopar MPI, > to HO, to even the newest intake (99 and up rounded runners). In fact > you can even use an old 4.2L carbureted 2bbl intake manifold on a 7120 > or 0630 head. Those are both HO "high port" heads without the 0331 > head's penchant for cracking. > > Again this might require some minor drilling, grinding, maybe even some > welding to get workable brackets and power steering but if you're doing > an engine swap and the thought of drilling, grinding and welding scares > you then you probably ought re-think doing it. :) > > -- > Simon > "I may be wrong, but I'm not uncertain." -- Robert A. Heinlein |
Re: 91 Jeep Cherokee 4.0 engine transplant.
You may bolt an older exhaust on to the 4.0 liter, but the 258 CID
carburetor manifold will not match the ports: http://www.----------.com/temp/258vs4LPorts.jpg God Bless America, Bill O|||||||O mailto:-------------------- Simon Juncal wrote: > > I'm not sure which manifold you're talking about... the exhuast manifold > changed but the port pattern is the same so it's just a matter of > swaping manifolds, or fab'ing or buying a new collector pipe, and > modifiying brackets for clearance. The intake manifold also has the same > port pattern and is 100% interchangable from Renix to non-HO mopar MPI, > to HO, to even the newest intake (99 and up rounded runners). In fact > you can even use an old 4.2L carbureted 2bbl intake manifold on a 7120 > or 0630 head. Those are both HO "high port" heads without the 0331 > head's penchant for cracking. > > Again this might require some minor drilling, grinding, maybe even some > welding to get workable brackets and power steering but if you're doing > an engine swap and the thought of drilling, grinding and welding scares > you then you probably ought re-think doing it. :) > > -- > Simon > "I may be wrong, but I'm not uncertain." -- Robert A. Heinlein |
Re: 91 Jeep Cherokee 4.0 engine transplant.
You may bolt an older exhaust on to the 4.0 liter, but the 258 CID
carburetor manifold will not match the ports: http://www.----------.com/temp/258vs4LPorts.jpg God Bless America, Bill O|||||||O mailto:-------------------- Simon Juncal wrote: > > I'm not sure which manifold you're talking about... the exhuast manifold > changed but the port pattern is the same so it's just a matter of > swaping manifolds, or fab'ing or buying a new collector pipe, and > modifiying brackets for clearance. The intake manifold also has the same > port pattern and is 100% interchangable from Renix to non-HO mopar MPI, > to HO, to even the newest intake (99 and up rounded runners). In fact > you can even use an old 4.2L carbureted 2bbl intake manifold on a 7120 > or 0630 head. Those are both HO "high port" heads without the 0331 > head's penchant for cracking. > > Again this might require some minor drilling, grinding, maybe even some > welding to get workable brackets and power steering but if you're doing > an engine swap and the thought of drilling, grinding and welding scares > you then you probably ought re-think doing it. :) > > -- > Simon > "I may be wrong, but I'm not uncertain." -- Robert A. Heinlein |
Re: 91 Jeep Cherokee 4.0 engine transplant.
Dang, I'd better get my glasses checked. I would have sworn that the
intake was a mismatch. And here I was looking at a low mileage 4.0 HO (98) the other day and backed away because of the match problem! Does the downpipe mate up to the older exhaust as well? On Sun, 1 Oct 2006 20:09:41 UTC Simon Juncal <SPAMERSSUCK@usefirstinitialandlastnameATerols.com > wrote: > Will Honea wrote: > > Biggest problem with a swap between the HO and earlier 4.0's is the > > head - the manifolds are NOT interchangeable between the two heads. > > I'm not sure which manifold you're talking about... the exhuast manifold > changed but the port pattern is the same so it's just a matter of > swaping manifolds, or fab'ing or buying a new collector pipe, and > modifiying brackets for clearance. The intake manifold also has the same > port pattern and is 100% interchangable from Renix to non-HO mopar MPI, > to HO, to even the newest intake (99 and up rounded runners). In fact > you can even use an old 4.2L carbureted 2bbl intake manifold on a 7120 > or 0630 head. Those are both HO "high port" heads without the 0331 > head's penchant for cracking. > > Again this might require some minor drilling, grinding, maybe even some > welding to get workable brackets and power steering but if you're doing > an engine swap and the thought of drilling, grinding and welding scares > you then you probably ought re-think doing it. :) > -- Will Honea |
Re: 91 Jeep Cherokee 4.0 engine transplant.
Dang, I'd better get my glasses checked. I would have sworn that the
intake was a mismatch. And here I was looking at a low mileage 4.0 HO (98) the other day and backed away because of the match problem! Does the downpipe mate up to the older exhaust as well? On Sun, 1 Oct 2006 20:09:41 UTC Simon Juncal <SPAMERSSUCK@usefirstinitialandlastnameATerols.com > wrote: > Will Honea wrote: > > Biggest problem with a swap between the HO and earlier 4.0's is the > > head - the manifolds are NOT interchangeable between the two heads. > > I'm not sure which manifold you're talking about... the exhuast manifold > changed but the port pattern is the same so it's just a matter of > swaping manifolds, or fab'ing or buying a new collector pipe, and > modifiying brackets for clearance. The intake manifold also has the same > port pattern and is 100% interchangable from Renix to non-HO mopar MPI, > to HO, to even the newest intake (99 and up rounded runners). In fact > you can even use an old 4.2L carbureted 2bbl intake manifold on a 7120 > or 0630 head. Those are both HO "high port" heads without the 0331 > head's penchant for cracking. > > Again this might require some minor drilling, grinding, maybe even some > welding to get workable brackets and power steering but if you're doing > an engine swap and the thought of drilling, grinding and welding scares > you then you probably ought re-think doing it. :) > -- Will Honea |
Re: 91 Jeep Cherokee 4.0 engine transplant.
Dang, I'd better get my glasses checked. I would have sworn that the
intake was a mismatch. And here I was looking at a low mileage 4.0 HO (98) the other day and backed away because of the match problem! Does the downpipe mate up to the older exhaust as well? On Sun, 1 Oct 2006 20:09:41 UTC Simon Juncal <SPAMERSSUCK@usefirstinitialandlastnameATerols.com > wrote: > Will Honea wrote: > > Biggest problem with a swap between the HO and earlier 4.0's is the > > head - the manifolds are NOT interchangeable between the two heads. > > I'm not sure which manifold you're talking about... the exhuast manifold > changed but the port pattern is the same so it's just a matter of > swaping manifolds, or fab'ing or buying a new collector pipe, and > modifiying brackets for clearance. The intake manifold also has the same > port pattern and is 100% interchangable from Renix to non-HO mopar MPI, > to HO, to even the newest intake (99 and up rounded runners). In fact > you can even use an old 4.2L carbureted 2bbl intake manifold on a 7120 > or 0630 head. Those are both HO "high port" heads without the 0331 > head's penchant for cracking. > > Again this might require some minor drilling, grinding, maybe even some > welding to get workable brackets and power steering but if you're doing > an engine swap and the thought of drilling, grinding and welding scares > you then you probably ought re-think doing it. :) > -- Will Honea |
Re: 91 Jeep Cherokee 4.0 engine transplant.
Sorry Bill, but you are mistaken. Folks swap the 4.0 head onto the 4.2
engine all the time. 'I' don't like the idea of relying on epoxy to hold the coolant passages, but hey that's me. You only have to change the exhaust for the 4.0 header, the intake matches up just fine so the carb can go back on the 4.0 head. http://www.off-road.com/jeep/new/40conv.html So in other words, you can junk the fuel injection on a 4.0, drop in a cam and go with a carb and maybe a nice 4.2 performance intake to 'really' get some power out of it. :-) Mike 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00 88 Cherokee 235 BFG AT's Canadian Off Road Trips Photos: Non members can still view! Jan/06 http://www.imagestation.com/album/pi...?id=2115147590 (More Off Road album links at bottom of the view page) "L.W.(Bill) ------ III" wrote: > > You may bolt an older exhaust on to the 4.0 liter, but the 258 CID > carburetor manifold will not match the ports: > http://www.----------.com/temp/258vs4LPorts.jpg > God Bless America, Bill O|||||||O > mailto:-------------------- > > Simon Juncal wrote: > > > > I'm not sure which manifold you're talking about... the exhuast manifold > > changed but the port pattern is the same so it's just a matter of > > swaping manifolds, or fab'ing or buying a new collector pipe, and > > modifiying brackets for clearance. The intake manifold also has the same > > port pattern and is 100% interchangable from Renix to non-HO mopar MPI, > > to HO, to even the newest intake (99 and up rounded runners). In fact > > you can even use an old 4.2L carbureted 2bbl intake manifold on a 7120 > > or 0630 head. Those are both HO "high port" heads without the 0331 > > head's penchant for cracking. > > > > Again this might require some minor drilling, grinding, maybe even some > > welding to get workable brackets and power steering but if you're doing > > an engine swap and the thought of drilling, grinding and welding scares > > you then you probably ought re-think doing it. :) > > > > -- > > Simon > > "I may be wrong, but I'm not uncertain." -- Robert A. Heinlein |
Re: 91 Jeep Cherokee 4.0 engine transplant.
Sorry Bill, but you are mistaken. Folks swap the 4.0 head onto the 4.2
engine all the time. 'I' don't like the idea of relying on epoxy to hold the coolant passages, but hey that's me. You only have to change the exhaust for the 4.0 header, the intake matches up just fine so the carb can go back on the 4.0 head. http://www.off-road.com/jeep/new/40conv.html So in other words, you can junk the fuel injection on a 4.0, drop in a cam and go with a carb and maybe a nice 4.2 performance intake to 'really' get some power out of it. :-) Mike 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00 88 Cherokee 235 BFG AT's Canadian Off Road Trips Photos: Non members can still view! Jan/06 http://www.imagestation.com/album/pi...?id=2115147590 (More Off Road album links at bottom of the view page) "L.W.(Bill) ------ III" wrote: > > You may bolt an older exhaust on to the 4.0 liter, but the 258 CID > carburetor manifold will not match the ports: > http://www.----------.com/temp/258vs4LPorts.jpg > God Bless America, Bill O|||||||O > mailto:-------------------- > > Simon Juncal wrote: > > > > I'm not sure which manifold you're talking about... the exhuast manifold > > changed but the port pattern is the same so it's just a matter of > > swaping manifolds, or fab'ing or buying a new collector pipe, and > > modifiying brackets for clearance. The intake manifold also has the same > > port pattern and is 100% interchangable from Renix to non-HO mopar MPI, > > to HO, to even the newest intake (99 and up rounded runners). In fact > > you can even use an old 4.2L carbureted 2bbl intake manifold on a 7120 > > or 0630 head. Those are both HO "high port" heads without the 0331 > > head's penchant for cracking. > > > > Again this might require some minor drilling, grinding, maybe even some > > welding to get workable brackets and power steering but if you're doing > > an engine swap and the thought of drilling, grinding and welding scares > > you then you probably ought re-think doing it. :) > > > > -- > > Simon > > "I may be wrong, but I'm not uncertain." -- Robert A. Heinlein |
Re: 91 Jeep Cherokee 4.0 engine transplant.
Sorry Bill, but you are mistaken. Folks swap the 4.0 head onto the 4.2
engine all the time. 'I' don't like the idea of relying on epoxy to hold the coolant passages, but hey that's me. You only have to change the exhaust for the 4.0 header, the intake matches up just fine so the carb can go back on the 4.0 head. http://www.off-road.com/jeep/new/40conv.html So in other words, you can junk the fuel injection on a 4.0, drop in a cam and go with a carb and maybe a nice 4.2 performance intake to 'really' get some power out of it. :-) Mike 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00 88 Cherokee 235 BFG AT's Canadian Off Road Trips Photos: Non members can still view! Jan/06 http://www.imagestation.com/album/pi...?id=2115147590 (More Off Road album links at bottom of the view page) "L.W.(Bill) ------ III" wrote: > > You may bolt an older exhaust on to the 4.0 liter, but the 258 CID > carburetor manifold will not match the ports: > http://www.----------.com/temp/258vs4LPorts.jpg > God Bless America, Bill O|||||||O > mailto:-------------------- > > Simon Juncal wrote: > > > > I'm not sure which manifold you're talking about... the exhuast manifold > > changed but the port pattern is the same so it's just a matter of > > swaping manifolds, or fab'ing or buying a new collector pipe, and > > modifiying brackets for clearance. The intake manifold also has the same > > port pattern and is 100% interchangable from Renix to non-HO mopar MPI, > > to HO, to even the newest intake (99 and up rounded runners). In fact > > you can even use an old 4.2L carbureted 2bbl intake manifold on a 7120 > > or 0630 head. Those are both HO "high port" heads without the 0331 > > head's penchant for cracking. > > > > Again this might require some minor drilling, grinding, maybe even some > > welding to get workable brackets and power steering but if you're doing > > an engine swap and the thought of drilling, grinding and welding scares > > you then you probably ought re-think doing it. :) > > > > -- > > Simon > > "I may be wrong, but I'm not uncertain." -- Robert A. Heinlein |
Re: 91 Jeep Cherokee 4.0 engine transplant.
L.W.(Bill) ------ III wrote:
> You may bolt an older exhaust on to the 4.0 liter, but the 258 CID > carburetor manifold will not match the ports: > http://www.----------.com/temp/258vs4LPorts.jpg Ok if I e-mail you a picture of my 88 YJ's black powdercoated 2bbl aluminum intake bolted to a 0630 4.0 head and Stainless OEM style 4.0 header with a small sign that reads "Bill is wrong" will you post it and admit the sign is correct? -- Simon "I may be wrong, but I'm not uncertain." -- Robert A. Heinlein |
Re: 91 Jeep Cherokee 4.0 engine transplant.
L.W.(Bill) ------ III wrote:
> You may bolt an older exhaust on to the 4.0 liter, but the 258 CID > carburetor manifold will not match the ports: > http://www.----------.com/temp/258vs4LPorts.jpg Ok if I e-mail you a picture of my 88 YJ's black powdercoated 2bbl aluminum intake bolted to a 0630 4.0 head and Stainless OEM style 4.0 header with a small sign that reads "Bill is wrong" will you post it and admit the sign is correct? -- Simon "I may be wrong, but I'm not uncertain." -- Robert A. Heinlein |
Re: 91 Jeep Cherokee 4.0 engine transplant.
L.W.(Bill) ------ III wrote:
> You may bolt an older exhaust on to the 4.0 liter, but the 258 CID > carburetor manifold will not match the ports: > http://www.----------.com/temp/258vs4LPorts.jpg Ok if I e-mail you a picture of my 88 YJ's black powdercoated 2bbl aluminum intake bolted to a 0630 4.0 head and Stainless OEM style 4.0 header with a small sign that reads "Bill is wrong" will you post it and admit the sign is correct? -- Simon "I may be wrong, but I'm not uncertain." -- Robert A. Heinlein |
Re: 91 Jeep Cherokee 4.0 engine transplant.
Mike Romain wrote:
> So in other words, you can junk the fuel injection on a 4.0, drop in a > cam and go with a carb and maybe a nice 4.2 performance intake to > 'really' get some power out of it. :-) I'll tell you if you really want some power out of a Jeep 6, do a 4.0 stroker, the 4.6 (or more) with a 4.2 crank and rods is a real eye opener if you're used to the 4.2 or 4.0... It's not hard at all to put down more RWHP than a stock Mustang 5.0 with a mildly messaged stroker. The 4.0 w/ FI is definitely a better bet for power than ANY combintation of upgrades with a 4.2, (short of forced induction). I know you're fond of that old turd of an engine Mike but lets face it that thing was rated at just over a hundred hp and torque in it's day... And that might have been optimistic or even flywheel numbers... The 4.0 whips the pants off it in just about every regard. I own and wheel all three engines and I'll never build on a 4.2 again... waste of time. -- Simon "I may be wrong, but I'm not uncertain." -- Robert A. Heinlein |
Re: 91 Jeep Cherokee 4.0 engine transplant.
Mike Romain wrote:
> So in other words, you can junk the fuel injection on a 4.0, drop in a > cam and go with a carb and maybe a nice 4.2 performance intake to > 'really' get some power out of it. :-) I'll tell you if you really want some power out of a Jeep 6, do a 4.0 stroker, the 4.6 (or more) with a 4.2 crank and rods is a real eye opener if you're used to the 4.2 or 4.0... It's not hard at all to put down more RWHP than a stock Mustang 5.0 with a mildly messaged stroker. The 4.0 w/ FI is definitely a better bet for power than ANY combintation of upgrades with a 4.2, (short of forced induction). I know you're fond of that old turd of an engine Mike but lets face it that thing was rated at just over a hundred hp and torque in it's day... And that might have been optimistic or even flywheel numbers... The 4.0 whips the pants off it in just about every regard. I own and wheel all three engines and I'll never build on a 4.2 again... waste of time. -- Simon "I may be wrong, but I'm not uncertain." -- Robert A. Heinlein |
Re: 91 Jeep Cherokee 4.0 engine transplant.
Mike Romain wrote:
> So in other words, you can junk the fuel injection on a 4.0, drop in a > cam and go with a carb and maybe a nice 4.2 performance intake to > 'really' get some power out of it. :-) I'll tell you if you really want some power out of a Jeep 6, do a 4.0 stroker, the 4.6 (or more) with a 4.2 crank and rods is a real eye opener if you're used to the 4.2 or 4.0... It's not hard at all to put down more RWHP than a stock Mustang 5.0 with a mildly messaged stroker. The 4.0 w/ FI is definitely a better bet for power than ANY combintation of upgrades with a 4.2, (short of forced induction). I know you're fond of that old turd of an engine Mike but lets face it that thing was rated at just over a hundred hp and torque in it's day... And that might have been optimistic or even flywheel numbers... The 4.0 whips the pants off it in just about every regard. I own and wheel all three engines and I'll never build on a 4.2 again... waste of time. -- Simon "I may be wrong, but I'm not uncertain." -- Robert A. Heinlein |
Re: 91 Jeep Cherokee 4.0 engine transplant.
Mail it to me and I'll post it.
God Bless America, Bill O|||||||O mailto:-------------------- http://www.----------.com/ Simon Juncal wrote: > > Ok if I e-mail you a picture of my 88 YJ's black powdercoated 2bbl > aluminum intake bolted to a 0630 4.0 head and Stainless OEM style 4.0 > header with a small sign that reads "Bill is wrong" will you post it and > admit the sign is correct? > > -- > Simon |
Re: 91 Jeep Cherokee 4.0 engine transplant.
Mail it to me and I'll post it.
God Bless America, Bill O|||||||O mailto:-------------------- http://www.----------.com/ Simon Juncal wrote: > > Ok if I e-mail you a picture of my 88 YJ's black powdercoated 2bbl > aluminum intake bolted to a 0630 4.0 head and Stainless OEM style 4.0 > header with a small sign that reads "Bill is wrong" will you post it and > admit the sign is correct? > > -- > Simon |
Re: 91 Jeep Cherokee 4.0 engine transplant.
Mail it to me and I'll post it.
God Bless America, Bill O|||||||O mailto:-------------------- http://www.----------.com/ Simon Juncal wrote: > > Ok if I e-mail you a picture of my 88 YJ's black powdercoated 2bbl > aluminum intake bolted to a 0630 4.0 head and Stainless OEM style 4.0 > header with a small sign that reads "Bill is wrong" will you post it and > admit the sign is correct? > > -- > Simon |
Re: 91 Jeep Cherokee 4.0 engine transplant.
I was correcting Simon assumption: You may bolt an older exhaust on
to the 4.0 liter "head", but the 258 CID carburetor manifold will not match the ports: http://www.----------.com/temp/258vs4LPorts.jpg Mike, you did notice the difference in your head and an fuel injection head????? God Bless America, Bill O|||||||O mailto:-------------------- http://www.----------.com/ Mike Romain wrote: > > Sorry Bill, but you are mistaken. Folks swap the 4.0 head onto the 4.2 > engine all the time. 'I' don't like the idea of relying on epoxy to > hold the coolant passages, but hey that's me. > > You only have to change the exhaust for the 4.0 header, the intake > matches up just fine so the carb can go back on the 4.0 head. > > http://www.off-road.com/jeep/new/40conv.html > > So in other words, you can junk the fuel injection on a 4.0, drop in a > cam and go with a carb and maybe a nice 4.2 performance intake to > 'really' get some power out of it. :-) > > Mike > 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00 > 88 Cherokee 235 BFG AT's > Canadian Off Road Trips Photos: Non members can still view! > Jan/06 http://www.imagestation.com/album/pi...?id=2115147590 > (More Off Road album links at bottom of the view page) > > "L.W.(Bill) ------ III" wrote: > > > > You may bolt an older exhaust on to the 4.0 liter, but the 258 CID > > carburetor manifold will not match the ports: > > http://www.----------.com/temp/258vs4LPorts.jpg > > God Bless America, Bill O|||||||O > > mailto:-------------------- > > > > Simon Juncal wrote: > > > > > > I'm not sure which manifold you're talking about... the exhuast manifold > > > changed but the port pattern is the same so it's just a matter of > > > swaping manifolds, or fab'ing or buying a new collector pipe, and > > > modifiying brackets for clearance. The intake manifold also has the same > > > port pattern and is 100% interchangable from Renix to non-HO mopar MPI, > > > to HO, to even the newest intake (99 and up rounded runners). In fact > > > you can even use an old 4.2L carbureted 2bbl intake manifold on a 7120 > > > or 0630 head. Those are both HO "high port" heads without the 0331 > > > head's penchant for cracking. > > > > > > Again this might require some minor drilling, grinding, maybe even some > > > welding to get workable brackets and power steering but if you're doing > > > an engine swap and the thought of drilling, grinding and welding scares > > > you then you probably ought re-think doing it. :) > > > > > > -- > > > Simon > > > "I may be wrong, but I'm not uncertain." -- Robert A. Heinlein |
Re: 91 Jeep Cherokee 4.0 engine transplant.
I was correcting Simon assumption: You may bolt an older exhaust on
to the 4.0 liter "head", but the 258 CID carburetor manifold will not match the ports: http://www.----------.com/temp/258vs4LPorts.jpg Mike, you did notice the difference in your head and an fuel injection head????? God Bless America, Bill O|||||||O mailto:-------------------- http://www.----------.com/ Mike Romain wrote: > > Sorry Bill, but you are mistaken. Folks swap the 4.0 head onto the 4.2 > engine all the time. 'I' don't like the idea of relying on epoxy to > hold the coolant passages, but hey that's me. > > You only have to change the exhaust for the 4.0 header, the intake > matches up just fine so the carb can go back on the 4.0 head. > > http://www.off-road.com/jeep/new/40conv.html > > So in other words, you can junk the fuel injection on a 4.0, drop in a > cam and go with a carb and maybe a nice 4.2 performance intake to > 'really' get some power out of it. :-) > > Mike > 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00 > 88 Cherokee 235 BFG AT's > Canadian Off Road Trips Photos: Non members can still view! > Jan/06 http://www.imagestation.com/album/pi...?id=2115147590 > (More Off Road album links at bottom of the view page) > > "L.W.(Bill) ------ III" wrote: > > > > You may bolt an older exhaust on to the 4.0 liter, but the 258 CID > > carburetor manifold will not match the ports: > > http://www.----------.com/temp/258vs4LPorts.jpg > > God Bless America, Bill O|||||||O > > mailto:-------------------- > > > > Simon Juncal wrote: > > > > > > I'm not sure which manifold you're talking about... the exhuast manifold > > > changed but the port pattern is the same so it's just a matter of > > > swaping manifolds, or fab'ing or buying a new collector pipe, and > > > modifiying brackets for clearance. The intake manifold also has the same > > > port pattern and is 100% interchangable from Renix to non-HO mopar MPI, > > > to HO, to even the newest intake (99 and up rounded runners). In fact > > > you can even use an old 4.2L carbureted 2bbl intake manifold on a 7120 > > > or 0630 head. Those are both HO "high port" heads without the 0331 > > > head's penchant for cracking. > > > > > > Again this might require some minor drilling, grinding, maybe even some > > > welding to get workable brackets and power steering but if you're doing > > > an engine swap and the thought of drilling, grinding and welding scares > > > you then you probably ought re-think doing it. :) > > > > > > -- > > > Simon > > > "I may be wrong, but I'm not uncertain." -- Robert A. Heinlein |
Re: 91 Jeep Cherokee 4.0 engine transplant.
I was correcting Simon assumption: You may bolt an older exhaust on
to the 4.0 liter "head", but the 258 CID carburetor manifold will not match the ports: http://www.----------.com/temp/258vs4LPorts.jpg Mike, you did notice the difference in your head and an fuel injection head????? God Bless America, Bill O|||||||O mailto:-------------------- http://www.----------.com/ Mike Romain wrote: > > Sorry Bill, but you are mistaken. Folks swap the 4.0 head onto the 4.2 > engine all the time. 'I' don't like the idea of relying on epoxy to > hold the coolant passages, but hey that's me. > > You only have to change the exhaust for the 4.0 header, the intake > matches up just fine so the carb can go back on the 4.0 head. > > http://www.off-road.com/jeep/new/40conv.html > > So in other words, you can junk the fuel injection on a 4.0, drop in a > cam and go with a carb and maybe a nice 4.2 performance intake to > 'really' get some power out of it. :-) > > Mike > 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00 > 88 Cherokee 235 BFG AT's > Canadian Off Road Trips Photos: Non members can still view! > Jan/06 http://www.imagestation.com/album/pi...?id=2115147590 > (More Off Road album links at bottom of the view page) > > "L.W.(Bill) ------ III" wrote: > > > > You may bolt an older exhaust on to the 4.0 liter, but the 258 CID > > carburetor manifold will not match the ports: > > http://www.----------.com/temp/258vs4LPorts.jpg > > God Bless America, Bill O|||||||O > > mailto:-------------------- > > > > Simon Juncal wrote: > > > > > > I'm not sure which manifold you're talking about... the exhuast manifold > > > changed but the port pattern is the same so it's just a matter of > > > swaping manifolds, or fab'ing or buying a new collector pipe, and > > > modifiying brackets for clearance. The intake manifold also has the same > > > port pattern and is 100% interchangable from Renix to non-HO mopar MPI, > > > to HO, to even the newest intake (99 and up rounded runners). In fact > > > you can even use an old 4.2L carbureted 2bbl intake manifold on a 7120 > > > or 0630 head. Those are both HO "high port" heads without the 0331 > > > head's penchant for cracking. > > > > > > Again this might require some minor drilling, grinding, maybe even some > > > welding to get workable brackets and power steering but if you're doing > > > an engine swap and the thought of drilling, grinding and welding scares > > > you then you probably ought re-think doing it. :) > > > > > > -- > > > Simon > > > "I may be wrong, but I'm not uncertain." -- Robert A. Heinlein |
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