OM617 Jeep Cherokee Questions
4BTSwaps.com is the premier Cummins Forum on the internet. Registered Users do not see the above ads.
+ Reply to Thread
Page 1 of 2 12 LastLast
Results 1 to 30 of 57

Thread: OM617 Jeep Cherokee Questions

  1. #1
    Registered User
    Join Date
    Jun 2012
    Location
    Huntsville, AL
    Posts
    42
    Thanks
    0
    Thanked 0 Times in 0 Posts

    Default OM617 Jeep Cherokee Questions

    Hey everyone im new here. I mostly hangout on the gun forums like gunco but have been lurking around and finaly decided to join because ive been really interested in diesel conversions and wvo stuff lately.

    Anyways I have in my posession one 1995 cherokee with ax15 transmission "2wd" and one mercedes 300sd and I wanna do the swap....but i have a few questions

    1. Can i pull this off with no lift kit by getting the drop pitman arm and doing some oil pan mods?
    2. How should I do the engine mounts?
    3. How can i make the jeep ac compressor work with this engine?

    I know I'm gonna have more questions but cant think of any more at the moment, also my reason for wanting to do this conversion is i want improved mpg and to eventually do a WVO system. I got the 2wd version because it was the only 5 spd cherokee i could find and it was only $800.
    I dont plan on taking this thing off road anywhere where i would need 4wd and i really like stick shift boxy shaped suv's like my 88 trooper.
    Feel free to correct me on anything cuz i'm no expert on this stuff.

  2. Remove Advertisements
    4BTSwaps.com
    Advertisements
     

  3. #2
    Registered User
    Join Date
    Feb 2010
    Location
    vancouver wa
    Posts
    596
    Thanks
    13
    Thanked 6 Times in 6 Posts

    Default

    Yes you should be able to go without lifting, and no pan mods providing you place the motor in the right spot. A drop pitman and trac bar mod will be required. As far as the ac compressor, you can make it work with fabbing a new mount ( the benz unit mounts way too low) and swap the pully to a v-groove. Mounts will have to be fabbed, reinforcement on the frame rails. Good luck!

  4. #3
    Registered User
    Join Date
    Jun 2012
    Location
    Huntsville, AL
    Posts
    42
    Thanks
    0
    Thanked 0 Times in 0 Posts

    Default

    Thanks! I was really dreading the thought of having to do all sorts of oil pan mods.

  5. #4
    Registered User
    Join Date
    Jul 2009
    Location
    Kanab, UT
    Posts
    432
    Thanks
    12
    Thanked 14 Times in 12 Posts

    Default

    You can just buy the adapter plate, mounts & modded oil pan as a kit. www.mercedesdiesel4x4.com I think...

    Ed

  6. #5
    Registered User
    Join Date
    Jun 2012
    Location
    Huntsville, AL
    Posts
    42
    Thanks
    0
    Thanked 0 Times in 0 Posts

    Default

    Thats where i was gonna get the adapter plate from but their modded oil pan does look interesting. so if i choose to mod the oil pan can i leave the pitman arm and track bar mount alone?

  7. #6
    Registered User
    Join Date
    Feb 2010
    Location
    vancouver wa
    Posts
    596
    Thanks
    13
    Thanked 6 Times in 6 Posts

    Default

    I don't belive so, the oil pump keeps the sump where it is right in line with the trac bar. Your best option is to re-work the shape of the trac bar, you don't have the dif to work around so it can be in the shape of a U if need be. The modded pan is more for dif clearance.

  8. #7
    Registered User
    Join Date
    Jun 2012
    Location
    Huntsville, AL
    Posts
    42
    Thanks
    0
    Thanked 0 Times in 0 Posts

    Default

    ahh ok thanks.

  9. #8
    Registered User
    Join Date
    Nov 2009
    Location
    Norfolk, VA
    Posts
    34
    Thanks
    0
    Thanked 0 Times in 0 Posts

    Default

    I did this same swap with a 96 2wd XJ last summer and it's working out well. One thing that got me though is almost all manual XJs came with 3.07 gear in the rear axle stock. This makes 5th gear pretty useless and acceleration didn't happen. I got a deal on a 4.10 axle and swapped it in, with 225/70-r15s this is a little too much gear. I had some thing from another project stuck in my head when I was trying to calculate a gear set and I got stuck on needing the 4.10. I think a 3.55 with stock tires would get the best MPG and performance, but I haven't had a chance to test that theory yet.

    I used a pitman arm for a 3" lift and made custom track bar brackets at both the frame and axle, I still needed to cut out about half of my oil pan for clearance. I did use the stock track bar though, if I'd have ponied up the money for an after market strait style TB I would have made out better. I also ended up using a KYB universal steering stabilizer 'cause the stock one just took up too much space. My engine mounts are really generic and not very visually pleasing, but they get the job done. And I just deleted the AC, it didn't work in the truck I had gotten anyway. I did leave enough room in the front between the oil cooler and the radiator so I could mount a condenser if I want to, but that would mean making the room to mount the compressor.

    Here's a link to some of the pics from the build: OM617 swap

    Good luck with your swap.

  10. #9
    Registered User
    Join Date
    Jun 2012
    Location
    Huntsville, AL
    Posts
    42
    Thanks
    0
    Thanked 0 Times in 0 Posts

    Default

    Thanks chumley360 lots of good pics and info. I see you went with a remote oil filter setup, is that necessary for clearance or did you do it for other reasons?

  11. #10
    Registered User
    Join Date
    Feb 2010
    Location
    vancouver wa
    Posts
    596
    Thanks
    13
    Thanked 6 Times in 6 Posts

    Default

    No the remote filter is not required, very close to the firewall but not an issue. Some that have used the remote filter have had engine failiers due to oiling problems. Not sure what the issue was, but at least three I know of.

  12. #11
    Registered User
    Join Date
    Nov 2009
    Location
    Norfolk, VA
    Posts
    34
    Thanks
    0
    Thanked 0 Times in 0 Posts

    Default

    Like FTE said, a remote filter is not required. Here's a shot of the engine in the truck with the stock filter housing: Filter housing. I spent a bunch of time talking with the guys over at STD about different oil filters and cooling and decided to use the remote filters because it made it easier for me to run my cooler and lines with supplies I had on hand. Basically it saved me from buying metric-to-JIC adapters to run new lines and I made the block-off plate at home in my spare time with a piece of 1/4" plate. There's a guy over at STD that sell nice aluminum ones for a really reasonable price.

    I did a lot of things in my build that people didn't agree with or like, heck some of it I didn't/don't like. But I did the truck on a $2500 budget(that includes the truck and engine costs) and in about two months worth of time. If I did it again I'd take some more time and make some things look a little "cooler". But all in all it has become a good little daily driver.

  13. #12
    Registered User
    Join Date
    Jun 2012
    Location
    Huntsville, AL
    Posts
    42
    Thanks
    0
    Thanked 0 Times in 0 Posts

    Default

    Awesome, Thanks for all the pics and info guys. i think i'll keep the factory oil filter assembly.

  14. #13
    Registered User
    Join Date
    May 2011
    Location
    Northern WI
    Posts
    153
    Thanks
    0
    Thanked 1 Time in 1 Post

    Default

    I may have a bunch of knick-knacks for this swap if you you're interested. A 2WD Cherokee is prolly a much better choice thana 4wd one..

  15. #14
    Registered User
    Join Date
    Jun 2012
    Location
    Huntsville, AL
    Posts
    42
    Thanks
    0
    Thanked 0 Times in 0 Posts

    Default

    Definitely interested jrobz23 thanks!

  16. #15
    Registered User
    Join Date
    Jun 2012
    Location
    Huntsville, AL
    Posts
    42
    Thanks
    0
    Thanked 0 Times in 0 Posts

    Default

    Also this is kinda a newb question but im a little confused about the concept of flywheel balancing. I understand things that rotate and dont have uniform density have to be relieved in certain areas to keep them from wobbling but dont they do that to all flywheels? so why do i need to have my flywheel balanced again? I am using the mercedesdiesel4x4.com mb202 adapter and the instructions on the website arent super clear.

  17. #16
    Registered User
    Join Date
    May 2011
    Location
    Northern WI
    Posts
    153
    Thanks
    0
    Thanked 1 Time in 1 Post

    Default

    Sorry man. The XJ, my pride, and my OM617 knick-knacks went to replace my daily driver.

  18. #17
    Registered User
    Join Date
    Mar 2008
    Location
    asheville, nc
    Posts
    225
    Thanks
    6
    Thanked 10 Times in 7 Posts

    Default

    There is some (internet) speculation that some of the om617's are externally balanced. That is, the engine is not balanced in and of itself. Instead, it relies on the flywheel being inversely (un)balanced to account for it. My understanding is that one needs to check the balance of the flywheel that came with the 617 you are trying to use.

  19. #18
    Registered User
    Join Date
    Jun 2012
    Location
    Huntsville, AL
    Posts
    42
    Thanks
    0
    Thanked 0 Times in 0 Posts

    Default

    Its all good jrobz23

    asheville that makes alot of sense thanks for dumbing it down to my level lol.

    Im still gathering stuff and contemplating this swap so no progress yet. gonna try to get this engine started soon hopefully. I bought it along with another complete 300d that some guy had been running on wvo the wrong way so the injectors are gummed up. I'll be sure to post once i make progress.

  20. #19
    Registered User
    Join Date
    Dec 2009
    Location
    South Kansas City
    Posts
    157
    Thanks
    0
    Thanked 2 Times in 2 Posts

    Default

    the 2wd has a fake axle in the front. how is it any different? almost like the 90's fords rangers and bronco II's that had a fake transfer case just so the dirver shafts didn't have to be different. a lot of people just put front axle and transfercase and you have a 4wd

  21. #20
    Registered User
    Join Date
    May 2011
    Location
    Burque
    Posts
    92
    Thanks
    0
    Thanked 1 Time in 1 Post

    Default

    Quote Originally Posted by asheville View Post
    There is some (internet) speculation that some of the om617's are externally balanced. That is, the engine is not balanced in and of itself. Instead, it relies on the flywheel being inversely (un)balanced to account for it. My understanding is that one needs to check the balance of the flywheel that came with the 617 you are trying to use.
    I personally have a hard time believing this. There are 12 bolts that hold the mercedes flywheel in place, they are absolutely symmetrical in there location. The is no indexing pin or offset hole for an unbalanced flywheel to be aligned with, therefore Mercedes would have had to balance crank and flywheel together prior to assembly and mated for life as no two would be alike.

  22. #21
    Registered User
    Join Date
    Feb 2010
    Location
    vancouver wa
    Posts
    596
    Thanks
    13
    Thanked 6 Times in 6 Posts

    Default

    Quote Originally Posted by Jstncse View Post
    I personally have a hard time believing this. There are 12 bolts that hold the mercedes flywheel in place, they are absolutely symmetrical in there location. The is no indexing pin or offset hole for an unbalanced flywheel to be aligned with, therefore Mercedes would have had to balance crank and flywheel together prior to assembly and mated for life as no two would be alike.
    Belive it, the official MB service manual states just that! It says that the crank and flywheel are ballanced as one unit in the final ballance procedure, and goes through the procedure to match the flywheel balance in the event you have to replace one.

  23. #22
    Registered User
    Join Date
    Nov 2009
    Location
    Norfolk, VA
    Posts
    34
    Thanks
    0
    Thanked 0 Times in 0 Posts

    Default

    Yup what FTE said. I just got the machine shop to zero-balance my 4.0L flywheel and so far everything has been fine. I've been daily driving mine for about a year now. It was well worth the $45 to get it balanced.

  24. #23
    Registered User
    Join Date
    May 2011
    Location
    Burque
    Posts
    92
    Thanks
    0
    Thanked 1 Time in 1 Post

    Default

    Quote Originally Posted by fte View Post
    Belive it, the official MB service manual states just that! It says that the crank and flywheel are ballanced as one unit in the final ballance procedure, and goes through the procedure to match the flywheel balance in the event you have to replace one.
    I'll bite, what is the procedure to match the flywheel balance?

    I have one in a 78 FJ40 mated to a Chevrolet flywheel that is neutral balance and then mated to the stock Toyota drivetrain. I have a harmonic vibration around 2500 to 4000 rpm's that I cannot get rid of. I have basically chocked it up to very firm V8 motor mounts and the nature of the 5 cylinder but I am open to any suggestions to get rid of the vibration.

  25. #24
    Registered User
    Join Date
    Feb 2010
    Location
    vancouver wa
    Posts
    596
    Thanks
    13
    Thanked 6 Times in 6 Posts

    Default

    Quote Originally Posted by Jstncse View Post
    I'll bite, what is the procedure to match the flywheel balance?

    I have one in a 78 FJ40 mated to a Chevrolet flywheel that is neutral balance and then mated to the stock Toyota drivetrain. I have a harmonic vibration around 2500 to 4000 rpm's that I cannot get rid of. I have basically chocked it up to very firm V8 motor mounts and the nature of the 5 cylinder but I am open to any suggestions to get rid of the vibration.
    Before the Benz flywheel is removed, you need to mark it in relation to the crank, remove it and ck it's ballance. Then match the new flywheel with the old one's ballance, then install in the correct position.

  26. #25
    Registered User
    Join Date
    Jun 2012
    Location
    Bayview Idaho
    Posts
    27
    Thanks
    0
    Thanked 0 Times in 0 Posts

    Default

    Quote Originally Posted by fte View Post
    Before the Benz flywheel is removed, you need to mark it in relation to the crank, remove it and ck it's ballance. Then match the new flywheel with the old one's ballance, then install in the correct position.
    What happens if you have to change the crankshaft in a 617 rebuild, is it neccessary to have the crank and flywheel rebalanced together?

  27. #26
    Registered User
    Join Date
    Feb 2010
    Location
    vancouver wa
    Posts
    596
    Thanks
    13
    Thanked 6 Times in 6 Posts

    Default

    [QUOTE=zeeman;193117]What happens if you have to change the crankshaft in a 617 rebuild, is it neccessary to have the crank and flywheel rebalanced together?[/QUOTESeems logical.]

  28. #27
    Registered User
    Join Date
    Jun 2012
    Location
    Huntsville, AL
    Posts
    42
    Thanks
    0
    Thanked 0 Times in 0 Posts

    Default

    What have yall done about power steering lines? searched google for a while to figure out what fittings are on the merc pump end and what fittings go to the jeep side and have not found anything. I have decided to go with the merc motor mounts and the brackets from mercedesdiesel4x4 and Im gonna straight pipe the exhaust.

  29. #28
    Registered User
    Join Date
    May 2010
    Location
    va.
    Posts
    14
    Thanks
    0
    Thanked 0 Times in 0 Posts

    Default

    I just kept the jeep lines and flared them with the fittings that came off the merc and it worked fine.

  30. #29
    Registered User
    Join Date
    Nov 2009
    Location
    Norfolk, VA
    Posts
    34
    Thanks
    0
    Thanked 0 Times in 0 Posts

    Default

    Metric-to-JIC adapter on the pressure line port on the MB pump, custom 3/8" setup for the return side and similar on the steering box.

  31. #30
    Registered User
    Join Date
    Jun 2012
    Location
    Huntsville, AL
    Posts
    42
    Thanks
    0
    Thanked 0 Times in 0 Posts

    Default

    Thanks guys sounds pretty straight forward, I think i'll try the flare first.

+ Reply to Thread

Quick Reply Quick Reply

Register Now

Please enter the name by which you would like to log-in and be known on this site.
If you do not want to register, fill this field only and the name will be used as user name for your post.

Please enter a password for your user account. Note that passwords are case-sensitive.

Please enter a valid email address for yourself.

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.


Posting Permissions

  • You may post new threads
  • You may post replies
  • You may not post attachments
  • You may not edit your posts