JeepcoMJ Posted March 29, 2008 Posted March 29, 2008 alright, I just picked up a 94 cherokee 2.5 5 speed 4wd for $200. overall it's in decent shape for a beater but... the engine is toast. all 4 cylinders are scored to $#!&. I could hone out 3 of them and fix that, but the 4th I'm not sure if I can do anything to save it. anyways, I have another 2.5 block laying in the shop...it's a good block, from an 87 or 88 something like that. it had a spun rod bearing so it's got a bad rod and crank unless i wanted to have those fixed. so, I'm wondering if the blocks are pretty much identical. can I just use the 94 gasket set? I'm going to swap the crank and one rod from the 94 into the other block, and rebuild it...I figure for $200 and another $150 worth of gaskets, rings, rod, and main bearings, I can't go wrong on a decent DD.
JeepcoMJ Posted March 29, 2008 Author Posted March 29, 2008 anyone? I'm planning the rebuild this week, and I am searching...can't find much info tho.
ejndssn Posted March 30, 2008 Posted March 30, 2008 here may be a start for you it appears that the wrangler 4banger is good from 87-up then you have the jeep that states 87-90 http://"http://www.precisionengine.com/rebuild-kits :dunno: whats the beef between the two. good luck
JeepcoMJ Posted March 30, 2008 Author Posted March 30, 2008 well, one is renix era and one's not. technically they have a "different" headset (head gasketry), but that's just because of the aluminum valve cover change. I'm thinking theyr'e the same
Eagle Posted March 30, 2008 Posted March 30, 2008 AFAIK the short block is the same for all years. The 2.5L was changed from a Renix-based system to a Mopar injection/ignition in 1991, just like the 4.0L, but I don't they made any significant changes to the block.
tjbliley Posted March 30, 2008 Posted March 30, 2008 Only change I know of was the fuel pump from 86-87. Mechanical to electric. other than that I think you should be OK.
JeepcoMJ Posted March 30, 2008 Author Posted March 30, 2008 Only change I know of was the fuel pump from 86-87. Mechanical to electric. other than that I think you should be OK. mechanical was the 2.8 in 86. 2.5 was electric fuel pump. maybe 84-85 xj 2.5 was mechanical, as it was carbeurated.
tjbliley Posted March 30, 2008 Posted March 30, 2008 yup, whenever the carbs were in there. it was still same block. mine has a block off plate on it.
beaterjeep Posted March 30, 2008 Posted March 30, 2008 IIRC, when I was looking around for info on adding a turbo to the 2.5 people were saying that the Renix and ChryCo blocks were made of different materials; that one or the other was able to handle the extra strain better. Not sure if there's any truth to this one though. Just what I've read.
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