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