Thanks, the 99 G/cherokee 4.0L has bosses on the left front lower block to mount the a/c compressor plus it has the coil pak bolted to the cylinder head, the 99 cherokee has no bosses and has a distributor The junk yard said they where different but i was hoping you jeep guru's would know of a way around it.:brickwall:Not all 4.0 engines are the same even after 91 and up. You should be ok with the 99Cherokee to 99 Grand Cherokee swap though. Be careful, many people assume that they are the same but they are not. Suggestion: Next time call a junk yard to verify what year models for the 4.0 can be used in your vehicle. I know this as fact because I have talked with a few people around my area and they all had to find different engines and sell the ones they were going to swap.
I am just amazed that jeep would have two different 4.0L in 1999. Also you can't swap the heads, the one is made to bolt on the coil pakIf you want the right stuff, you need to find the right engine for it. There is no easy fix for your problem unless you get the right block for it. The only suggestion is to find another one and sell the one you have. Just a little fyi: the heads will swap but not the block.
Crap, thats right, sorry for the brain fart. You can only swap the heads if they both have a distributor or if both do not have a distributor.I am just amazed that jeep would have two different 4.0L in 1999. Also you can't swap the heads, the one is made to bolt on the coil pak
Ummm, I do not remember that being changed as I have one on my 2001 XJ right now.....the G.C. I believe were the ones that did not have the oil adapters. They only used the adapters because of clearance issues in the XJ's. My engine is the original to the jeep by the way.Since were talking 4.0 engine blocks my eng block does not the oil filter adapater that everyone has trouble with leaking o rings my oil fiter screws directly to block. It is a 99 xj I am guessing it is some kind of engine swap.
Not so!Crap, thats right, sorry for the brain fart. You can only swap the heads if they both have a distributor or if both do not have a distributor.
Yeah, that was the year they were transitioning to the new block that was distributorless and they were just using parts that were left over fromt he distributor ones until they basically ran out....that is what a friend of mine who works at the Chrystler test plant said.
Not all 4.0 blocks are the same although the changes are not big but a TJ, XJ and ZJ will not be suitable for a straight swap. The WJ 4.0 had a different mounting position on the block and had coil packs instead of a distributor. I believe that the internals are the same. I hope that helpsi have a 01 WJ.. 4x4 auto.. i found broken pieces in the oil pan. and need a rebuild.. are all the inline 6 4.0 blocks the same??? i need help. where would i find stock pistons and a master gasket kit.. this is my first jeep... need help..