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Kel_CJ8
06-04-2006, 02:53 PM
Is it possible to take the fuel injection off a 91 cherokee and put it on my 81 scrambler with the 4.2L??????

Nutbar
06-04-2006, 03:07 PM
Yes you can but you need to use the cylinder head(port pattern and shape is different than the 4.2L) and all related fuel inj parts from the 4.0L and definately use the 91 and newer inj it is a much better system than the 87 to 90 4.0L

DirtyComanche
06-04-2006, 05:46 PM
Do ya hate the renix or something, Nutbar?


I prefer it to the HO [32]

Kel_CJ8
06-04-2006, 07:21 PM
Does the 4.0L head bolt right up to the 4.2L????

Jeep eh
06-04-2006, 07:24 PM
go here for a really good write up on it http://monsterslayer.com/jeep/40Head/40Head.htm

Nutbar
06-04-2006, 07:39 PM
Does the 4.0L head bolt right up to the 4.2L????

4.0L head will go on the 4.2 block but use the 4.0L head gasket when you do it.

Nutbar
06-04-2006, 07:43 PM
Do ya hate the renix or something, Nutbar?


I prefer it to the HO [32]

I don't hate the Renix system but I know from exprience how problematic and complicated the Renix system is. The Chrysler system has less problems makes more power is more upgradeable and has more straight forward wiring than the Renix system

Kel_CJ8
06-04-2006, 07:48 PM
Is it neccesary to plug the coolant passages on the 4.0L head??

Nutbar
06-04-2006, 07:49 PM
Never had to plug anything on the 4.0 head before to put it on a 4.2