Mercedes OM617
#31
03-24-2009, 10:02 PM
pictures i will take tommorow as i should have done before.but swap was relatively easy if you have some skils of course.i bought 18x18x5/16 steel plate and with home made tool for hole transfer transfered all bolt holes,made cutout on bell housing for starter clearence as i had to relocate it and modified jeep flywheel to fit mercedes engine. that way i kept jeep original clutch,starter,trans stayed in same place and all drive train.made engine mounts and welded to frame and even transfered all sensors so my oem gages in jeep are working.everybody that has seen jeep with this engine says that it looks factory built.
#32
03-28-2009, 01:56 AM
elements available
The plungers in the pump are the rate limiting step. Seems like the next plunger up is much too large. Figure out if you have a 6.5mm pump (or 5.5) Most pump shops can only come up with 10mm replacements.(7.5-8 Ive heard is ideal) Adjustments can be made with the boost reference can. (like an ALDA compensator) The small T-4 compressor Housing and Wheel on the factory Benz Hot side with a small intercooler will help tremedously. Same EGT warnings you have heard before! Them pistons are real spendy.
I made custom elements for MW (617a) and M (603a)-IPs.
The MW's are 6mm diameter plungers with modified geometry of the control edges.
The larger seizes (OEM) can not be used, the cam lift is 10mm starting from diameter 8mm.
The small 5,5mm IP has only 8mm cam lift. My SD 82 is running with the 6mm MW elements since 7 months.
For the M (with 7mm cam lift) diameter 7mm elements are available, not yet custom made.
Further mods of the delivery valves are not tested up to now.
Providing sufficient air the potential of the elements will bring the kick.
(I am currently working on the turbo charger swap but I can already feel a performance increase)
Tom
#33
03-28-2009, 10:19 AM
Can't wait to see your pictures! That's the neat thing about these motors, they are very similar in size to the 4.0 I-6 gasser motor the jeeps had, and even in my Comanche truck, seemed to fit very well.
#36
03-29-2009, 10:08 PM
no pic of oil pan but i run 2 in shackle lift which only gives me 1" of lift on axle and for what i use it clears good.the only thing i could tell you is if you put any suspension lift it will clear no problem and even if it is 2-3 in close that suspension is sturdy enough not to cause problems.i have thought of couple things that i have seen with mine and you can take driver side corner of oil pan cut hole and weld it inside out or you can grind off gusset on your front diff to clear even more.but if you put lift on it it will be fine
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ps:front pumpkin is only thing you have to consider and and when you look at it if that suspension went that far it would cach less than 1/4 in,aproxymetly.those are some of the things that you will have to tweak in when you set engine in anyways as you will have to make your own engine mounts than you can play with it
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ps:front pumpkin is only thing you have to consider and and when you look at it if that suspension went that far it would cach less than 1/4 in,aproxymetly.those are some of the things that you will have to tweak in when you set engine in anyways as you will have to make your own engine mounts than you can play with it
Last edited by vlado; 03-29-2009 at 10:08 PM. Reason: Automerged Doublepost
#37
03-30-2009, 06:28 AM
Excellent info Vlado! I have some specific questions now:
1. How many miles have you driven it since you got it operational?
2. Do you have a tachometer? If so, what is your engine rpm for 65mph in 5th gear?
3. Do you have an EGT guage? If so, what is your egt reading at 65mph in 5th gear?
4. Does the jeep transmission feel like it is well matched for diesel's power band?
5. What are your complaints so far with this motor in the jeep?
Wow, I wish I could come and drive your jeep and experience it myself, first hand!
1. How many miles have you driven it since you got it operational?
2. Do you have a tachometer? If so, what is your engine rpm for 65mph in 5th gear?
3. Do you have an EGT guage? If so, what is your egt reading at 65mph in 5th gear?
4. Does the jeep transmission feel like it is well matched for diesel's power band?
5. What are your complaints so far with this motor in the jeep?
Wow, I wish I could come and drive your jeep and experience it myself, first hand!
#39
03-30-2009, 09:33 PM
i have put little over 900 miles since swap and so far i dot have any complaints with engine.i drove this jeep up till last weekend when i decided to strip paint off and fix rust on jeep.curently i dont have tach. and i am curently working on getting one set up. i heard that older mercedes alternators had pole on them for tach but have yet to find it.i didnt put egt gage in it so cant answer that question.just tonight i found that theese engines are running 3000 rpm's at 65 mph so i am going to figure out my gear ratio since this was only info that i was missing . as far as trans goes i read somwher that these ax-15 trans are medium duty and they will hold to the power of this engine and also i personaly dont have any problems.only thing i dont like in this trans is gear ratio and especialy 5 th gear too high.but rear end gear ratio should take care of that
#40
05-19-2009, 11:28 PM
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i just got done looking at your picks of your ob617 to trans adapter 
its so beutifully simple but how did you git the right alignment ???
i have the motor to install in my 87 jeep comanche with a 4" lift 33" and a sirvis bed. Curent motor is a gas
2.5L, ok gas motor not ok for me i need that black smock noise
its so beutifully simple but how did you git the right alignment ??? i have the motor to install in my 87 jeep comanche with a 4" lift 33" and a sirvis bed. Curent motor is a gas
2.5L, ok gas motor not ok for me i need that black smock noise
