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MB 300TD Cherokee swap
http://www.lostjeeps.com/forum/phpBB3/viewtopic.php?f=86&t=56217		 Page 1 of 1
Author:  grsjax [ Wed Oct 13, 2010 10:09 am ]
Post subject:  MB 300TD Cherokee swap
Lots of Benz 3 liter turbo diesel engines around. Wonder if anyone has swapped one into a Cherokee. How much hassle and is it worth the trouble?
Author:  warp2diesel [ Fri Oct 15, 2010 9:38 pm ]
Post subject:  Re: MB 300TD Cherokee swap
Which 300TD?
Mechanical injection?
If so thew biggest problem would be the oil sump location, adapter plate, and flywheel (manual)/flex plate (auto).
Making mounts is not rocket science, just block up the engine in place and fab the mounts.
With the newer electronic engines and common rail engines you have a bunch of communications issues.
Author:  grsjax [ Sat Oct 16, 2010 9:17 am ]
Post subject:  Re: MB 300TD Cherokee swap
Mechanical injection. Way to many problems trying to figure out the electronics for a computer controlled injection system. Does anyone make adaptors for this swap or would it be better to use the MB auto trans?
Author:  warp2diesel [ Wed Nov 17, 2010 8:40 pm ]
Post subject:  Re: MB 300TD Cherokee swap
I have made plates before, not rocket science. Autos are easier than manuals.
If I were doing it today, I would draw up both the trans and engine on CAD and lay one image over the other, print the drawing and make the plate.
Post some pics of both and the ideas will flow.
Author:  diesel_jr [ Mon Jan 24, 2011 1:55 am ]
Post subject:  Re: MB 300TD Cherokee swap
I started doing this about three years ago and then got married and now it is just sitting in the barn :( I have a 93 2 door cherokee that i swapped a manual in and had a custom flywheel built that had the MB crank bolt pattern. I was in the process of building an adapter plate and engine mounts when I got crazy busy. The MB engine I have is the 5 cy. turbo 300td out of an 80 model. It seems like it should be fairly easy to make the adapter plate, but my tdi project, my crd, my masters program, my baby, and my wife are taking priority at the time.... maybe after I finish my masters degree...
Author:  warp2diesel [ Wed Feb 02, 2011 9:06 am ]
Post subject:  Re: MB 300TD Cherokee swap
diesel_jr wrote:
I started doing this about three years ago and then got married and now it is just sitting in the barn :( I have a 93 2 door cherokee that i swapped a manual in and had a custom flywheel built that had the MB crank bolt pattern. I was in the process of building an adapter plate and engine mounts when I got crazy busy. The MB engine I have is the 5 cy. turbo 300td out of an 80 model. It seems like it should be fairly easy to make the adapter plate, but my tdi project, my crd, my masters program, my baby, and my wife are taking priority at the time.... maybe after I finish my masters degree...


Good Luck! Huny Doo takes a lot of time, never ends, only complete all thumbs idiots with more money than brains get off easy.

1) Drain out the engine oil and anything else that will drain out.
2) Put the engine on a stand flywheel up and do what you have to to level the flywheel.
3) Remove the flywheel and keep the engine back side level.
4) Place trans front side down with the pilot shaft into the pilot bearing/bushing in the rear of the crank.
5) Shim up the bell housing as needed so you are not putting a thrust load on the crank with the transmission pilot shaft.
6) Figure out how thick your plate needs to be.
7) Cut your plate to go around the rear main seal and crank but make sure you can catch all the bolts.
8) Mark and drill the attachment holes for the plate to attach to the engine, you may need to do some head scratching and be creative with fasteners, go do a Huny Doo if you get frustrated.
9) Position the trans onto the plate and move it around to determine how much play you have in the pilot shaft, do your best to center the trans. I used a dial indicator and put it dead nuts.
10) Clamp and mark your holes to attach the bell housing to the plate.

There are lots of what iffs, so take a break and do something else.
Using the process above, you can let it sit for months, work on it for a few min and let it sit some more.
Author:  red_smoke [ Wed Feb 09, 2011 5:28 pm ]
Post subject:  Re: MB 300TD Cherokee swap
Anything is possible. Personally, I'd shy away from the Cherokees just because of the unibody, but to each his own. I just completed a similar swap using a Cummins B3.3T into a Wrangler. Like warp said, it's just a matter of taking measurements on the clutch / converter stackup and getting both the engine and trans bolt patterns to fit between each other.

Do it!
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