OM617 IP swap questions - PeachParts Mercedes-Benz Forum

Maximan1 · #1 09-13-2018, 09:16 PM

Hey everyone,

First post here. My daily driver '79 240D died a few weeks ago - best I can guess is that the timing chain skipped some teeth. My mechanic said it was the first OM616 that has stumped him, and he was a master mechanic at Mercedes since the late 80's. I did not have him check timing, but everything else tested fine. Product of elimination says timing is off.

Instead of dealing with the 2.4, I went on Craigslist and found me a hell of a deal - 1985 OM617, complete with turbo, and 1982 trans for free! Of course, it was free because the guy put way too much boost into it and melted piston #1, but still a good deal in my opinion. When I got there, the guy threw in a bunch of accessories to sweeten he deal.

I ended up with the '85 engine and an '82 injection pump. Everything I read says '84-'85 IPs have some "electronic sensors", but I cannot find what those sensors are. Can I use this injection pump with my block?

I will probably post some kind of build thread with this as well. Can't wait to get my daily back up and running again!

Thanks in advance
Max

ROLLGUY · #2 09-13-2018, 09:54 PM

Quote:

Originally Posted by Maximan1

Hey everyone,

First post here. My daily driver '79 240D died a few weeks ago - best I can guess is that the timing chain skipped some teeth. My mechanic said it was the first OM616 that has stumped him, and he was a master mechanic at Mercedes since the late 80's. I did not have him check timing, but everything else tested fine. Product of elimination says timing is off.

Instead of dealing with the 2.4, I went on Craigslist and found me a hell of a deal - 1985 OM617, complete with turbo, and 1982 trans for free! Of course, it was free because the guy put way too much boost into it and melted piston #1, but still a good deal in my opinion. When I got there, the guy threw in a bunch of accessories to sweeten he deal.

I ended up with the '85 engine and an '82 injection pump. Everything I read says '84-'85 IPs have some "electronic sensors", but I cannot find what those sensors are. Can I use this injection pump with my block?

I will probably post some kind of build thread with this as well. Can't wait to get my daily back up and running again!

Thanks in advance
Max

"I ended up with the '85 engine and an '82 injection pump. Everything I read says '84-'85 IPs have some "electronic sensors", but I cannot find what those sensors are. Can I use this injection pump with my block?"

Yes, the '84 & 5 have a rack position sensor. It is located on the side of the IP towards the block. It is only used in '84 & 5 for emissions, so it is not needed. You can use either IP on either engine. The advantage with the later IP's is that they have a timing port on the side. It makes it easier to time/ check the timing.

Maximan1 · #3 09-14-2018, 12:16 AM

Thank you, Rollguy. I appreciate the information.