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Old 08-25-2013, 07:09 AM   #1 (permalink)
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Jeep Cherokee Mercedes Diesel

Working on a conversion kit for the Mercedes 617 engine, fabricating the motor mounts using cummins mounts adapted to the block with a aluminum adapter. Mounts in the stock Cherokee mount position on the frame.
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Old 08-25-2013, 10:54 AM   #2 (permalink)
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Very Nice
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Old 08-25-2013, 03:01 PM   #3 (permalink)
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this is on my list of things to do to the buggy, been eyeballing this motor for years.
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Old 08-25-2013, 03:05 PM   #4 (permalink)
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hell ya, cool as shit... what tranny??

forgive my ignorance, that's the engine Mercedes used in the late 70's and 80s in the 300D's correct?? they had a 5cyl and later on a 4cyl turbo.....


i had a buddy put one of those into an MJ, it got like 30mpg and scooted around pretty well.... only thing i didn't like about was he had to also convert the front to leaf springs because of the front sump oil pan... no room for the track bar..
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Old 08-25-2013, 04:36 PM   #5 (permalink)
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hell ya, cool as shit... what tranny??

forgive my ignorance, that's the engine Mercedes used in the late 70's and 80s in the 300D's correct?? they had a 5cyl and later on a 4cyl turbo.....


i had a buddy put one of those into an MJ, it got like 30mpg and scooted around pretty well.... only thing i didn't like about was he had to also convert the front to leaf springs because of the front sump oil pan... no room for the track bar..
It is using the AX-15 transmission. 79- 84 5 cyl turbo diesel. In the Cherokee it fits with a 3-4" lift kit, dropped pitman arm and a Rugged Ridge steering upgrade.
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Old 08-26-2013, 03:18 PM   #6 (permalink)
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it got like 30mpg and scooted around pretty well....
Hahah no it didn't. They'll move just as fast as a 4.0 but 30mpg? Keep on dreaming!
And you can still keep it coil spring.
Diesel Comanche build - Expedition Portal

There's a few videos in that thread, suckers sound good straight piped.
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Old 08-26-2013, 04:21 PM   #7 (permalink)
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Hahah no it didn't. They'll move just as fast as a 4.0 but 30mpg? Keep on dreaming!
And you can still keep it coil spring.
Diesel Comanche build - Expedition Portal

There's a few videos in that thread, suckers sound good straight piped.
MPG depends on tire size, gearing and how it is driven. You won't get 30 MPG with 33" tires. I have customers that do get 30 MPG, but they have normal mud and snow tires, stock gearing and they don't drive stupid.
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Old 08-26-2013, 11:02 PM   #8 (permalink)
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MPG depends on tire size, gearing and how it is driven. You won't get 30 MPG with 33" tires. I have customers that do get 30 MPG, but they have normal mud and snow tires, stock gearing and they don't drive stupid.
Our xjs compared to the mechs are much worse on aerodynamics, obviously 4wd being more moving parts dragging down the motor, gearing & tire size as well come into play as well. As weight.
Merc guys even with the w112 long runner manifold and other upgrades say they only pull 26mpg at best? Idk if it can be done that's great! But I've yet to see anyone claim and support 30mpgs with a om617...I wanted to do this swap but don't think it'd be legal in Cali so I had a stroker built.
I wonder how one of these with a smallish turbo upgrade, ported head, long runner intake, egr delete & meth injection would do. I believe the pump or injectors? Whatever you call it can only support like 250-270hp right? A small nozzle for meth could get you to around 300hp or so with cooler intake charge.
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Old 09-01-2013, 11:10 PM   #9 (permalink)
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MPG depends on tire size, gearing and how it is driven. You won't get 30 MPG with 33" tires. I have customers that do get 30 MPG, but they have normal mud and snow tires, stock gearing and they don't drive stupid.
well considering the mercedes dosent get 30mpg with pizza cutters, good luck getting better mileage in another vehicle. maby with the 2.4L motor but that will be SLOW!!!... and again good luck in another vehicle.

that motor will in a merc never get less than 20mpg no matter how fast you drive that, i can attest to that. ive literally driven it at 85 constantly for long periods of time up hills and stuff and it still got 22. still in a jeep i doubt it will be that great.


how did you do the flywheel with the ax15 trans. dosnt it need to be balanced with the entire rotating assembly?
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Old 09-01-2013, 11:13 PM   #10 (permalink)
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Originally Posted by babyhuey2 View Post
this is on my list of things to do to the buggy, been eyeballing this motor for years.
get a 606 or a 603 instead. mo power potential.
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Old 09-04-2013, 12:06 PM   #11 (permalink)
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well considering the mercedes dosent get 30mpg with pizza cutters, good luck getting better mileage in another vehicle. maby with the 2.4L motor but that will be SLOW!!!... and again good luck in another vehicle.

that motor will in a merc never get less than 20mpg no matter how fast you drive that, i can attest to that. ive literally driven it at 85 constantly for long periods of time up hills and stuff and it still got 22. still in a jeep i doubt it will be that great.


how did you do the flywheel with the ax15 trans. dosnt it need to be balanced with the entire rotating assembly?
If you didn't get 25-28 MPG something was wrong with your motor.
The flywheel was balanced with the engine assembly when it was rebuilt. Factory balance in these early engines was not very true.
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Old 09-05-2013, 02:44 AM   #12 (permalink)
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updates ? More pics of engine?
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Old 09-05-2013, 09:40 AM   #13 (permalink)
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updates ? More pics of engine?
Some pictures of the drivers side motor mount.
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Old 09-29-2013, 09:40 PM   #14 (permalink)
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Fabricating 3" exhaust from turbo around starter and under chassis. Final starter will be a gear drive with more clearence.
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Old 10-26-2013, 08:58 PM   #15 (permalink)
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Fabricating fan shroud, uses stock Mercedes engine fan.
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Old 12-11-2013, 06:01 AM   #16 (permalink)
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any updates

Looks like a great swap.Curious to see the outcome
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Old 12-14-2013, 08:49 AM   #17 (permalink)
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subscribed! I have been considering this just because the liberty CRD motor is still stupid expensive. plus I'm to the point of wanting to eliminate ALL electronics...

my tinfoil hat is getting bigger.
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Old 12-14-2013, 08:50 AM   #18 (permalink)
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oh, and I wanna throw one of these in my WJ too.
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Old 12-14-2013, 09:08 AM   #19 (permalink)
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nice work on the shroud.
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Old 12-16-2013, 09:30 AM   #20 (permalink)
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looks awesome. If I had the $$ I'd be all over it.
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Old 12-22-2013, 09:24 PM   #21 (permalink)
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Assembling new engine, you can appreciate German enginering building one of their engines. Time consuming but worth the effort in the end result.
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Old 06-15-2014, 01:42 AM   #22 (permalink)
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I subscribed, hope there are updates!
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Old 10-21-2014, 02:45 PM   #23 (permalink)
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Cant wait to see the finished product.
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Old Yesterday, 05:46 PM   #24 (permalink)
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Doing exactly this to my 85 XJ.

OP, you wouldn't happen to have any plans or drawings of the motor mounts would you?

What trans/tcase do you plan on putting behind it?
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