geordi wrote:
Thermorex, I'd be interested in hearing more about this merc engine... You say it will fit in a Cherokee? What year? I have a 97 Grand Cherokee with the v8 gas in it right now, and I'd love to be able to do an EASY conversion to a mechanical diesel. I want to retain the transmission and the transfer case, but I believe that transmission is all mechanical and torque-controlled anyway. I do not believe there is a separate TCM in there.
How much, how big / heavy? Will it bolt to a Mopar transmission?
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Geordi, at the time I don't know much either. I have a friend with a 300sd from 82 and he wants to sell it. I'm researching the topic as I understand there are different engine mounts, transmission adapters at least compared to stock jeep (I think that would be the most costly part of the project, aside buying the engine) . The Cherokee has the aw4 transmission, which is also electronically controlled, but there are kits available to make it full manual (sequential switch 1-4 with option to lock converter on any gear) . Not sure what transmission you have, but for both xj and zj an ax15 manual would work, if you don't want the aw4. Both as I know have the same housing bell.
The om617 - 5 cyl Mercedes td from 80s had been successfully swapped in Cherokee, I just need to see/research under what condition. I'd like to keep the aw4, it's a decent transmission if you keep it cool and for offroad autos are better, at least for me. Having an old GC (guess it's a zj), I'd be inclined to say that what works for me, should work for you too. I'll have to do the research anyway, so I'll let you know for sure what I find.
Om617 is definitely heavier than the 4.0 on my Cherokee, I need new coils and shocks for sure, but that would be the easy part. Oil pan may hit the axle with stock suspension. Electric is tedious but not hard since there are not too many computers controlling the dashboard on old Jeeps as I know, worse case some new gauges could be required, which is not a big deal. Being an old diesel, you only need one wire for the electric valve on the pump and another one for glow plugs, and this is pretty much all you need to start that engine. Those Mercedes engines are known to last way pass 500k, some getting to even 1 million. Average is about 24 if you drive normally and 30+ if you drive like a grandma.
Finding an engine may be challenging a bit, but for few thousands you can get the whole car, lol, about the same amount one spends with crd maintenance...