I just brought my 1987 U1000 over from Germany and I'm starting my overhaul. One of the first things on the list is a little more juice. The OM352 engine is currently set for 76kW... how does one go about dialing it up??? My local Unimog (Freightliner) dealer dosen't inspire much confidence...) Can this be done at an injection pump shop? Any help would be greatly appreciated !!!
Yes this can be done at a pump shop or you can do it yourself. From what I've looked at on mine it seems the cab would need to be tilted to access the rear of the injection pump. you will want to install a pyrometer in your manifold or weld a bung immediately after the manifold to measure your exhaust temps to keep from damaging your engine.
Thanks for the quick response !!! I'm not unfamiliar with diesels and the 352 as we had an A in a 1319 Box truck that had one in it. I would actually prefer to do it myself as opposed to pulling the pump. I'll take a peek at it tomorrow in the daylight !!
I will be inspecting (with a borrowed bore-scope) my 352A in my U1200 tomorrow (I know its Xmas day, but you have to have something to do in between presents and dinner) to see if it has the plugged bosses for the piston cooling squirters. I will let you know my findings.
If I find the bosses I will buy the squirters and the bigger oil pump and crank up the fuel.
Can't wait to hear what you find. I need to get the bolt pattern specs on the turbo to see what upgraded charger could replace the stock unit. Need an intercooler as well to make some power.
I have an older 155 horse OM352A in my 416. It does not have squirters. I didn't notice if it had the bosses when I installed it. It definitely has the smaller oil pump - same in size as naturally aspirated version.
Well I finally had a look in my engine today, and bad news. The oil pick up is right above the drain, so I could not get the bore-scope past it. I still don't know if I have squirters, plugs or bosses. I did read in my manual that its only from a certain engine # that has the oilers and my # is not the one, so I guess I am SOL.
I might try again next time I have the valve cover off for a valve adjust, I might be able to get the bore-scope down from the top. If I ever find out for sure you will be the first to know.
I found this on the archives.
On Nov 25, 2004, at 4:45 PM, Chris Willsey wrote:
Quote:
[The early OM352 turbo motors did not have oil spray on the pistons. I
think you can go up to about 170HP without and not have a problem. Of
course having them is better than not.]
Mid 1977 they started using a block casting that has provisions for the
spritzers, even when not installed. They just use a plug and seal ring
in the spritzer location. All the Brazilian built 344 motors (locally
produced 352) that I have encountered are set up for them as well.
Jack Russell
Not to say that this is law, but it is Jack for what it's worth. Also http://mogmsgexch.com/ is back up again so you can use it to search the mail list archives.
I'm curious if any of your sbu mogs dont have the machined and plugged bosses.
That's GREAT the archive is back up, I learned a ton there.
There's potential for some good power to be made, it just takes money. I've been hot rodding Cummins diesels for 10 years, since I was 18. I have my doubts that the 352A is as overbuilt as a B5.9 but for short duty cycles I bet 250-300hp would be alright.
I just had to know
did i have machined ports for piston oil coolers or not?
a full day to drop the pan to find NO piston cooling jets or ports with plugs; the bosses are there on the block it appears, but i ain't doing that job without pulling the engine
more pain to drop the pan than i thought, drop the oil filter, the 12V alternator i have, the power steerrign pump, and the sway bar
1981 stock OM352 ex german U1300L, upgraded with Turbo last fall
Hmmm... interesting. No problems with the install ??? Did you engineer it or have it done ? Aftercooler ??? Do you know if there is any kind of oil restrictor in the turbo line ? What kind of boost pressure are you running ??? Stock injectors ?? Did you expect this many questions ??
Eurotruck has this one for $6200 installed. Spendy but also M-B approved! http://www.eurotruck-importers.com/images/Turbo.jpg If you know the origional turbos sizes, you could do a custom install, but the plumbing will be tricky..
Well I finally had a look in my engine today, and bad news. The oil pick up is right above the drain, so I could not get the bore-scope past it. I still don't know if I have squirters, plugs or bosses. I did read in my manual that its only from a certain engine # that has the oilers and my # is not the one, so I guess I am SOL.
Did you ever get a chance to look up the #'s on which engines have the squirters and which don't. I am thinking of picking up a turbo engine for one of my projects, so I want to make sure I get one with squirters.
I looked in my manuals last night, in the engine lubrication section. It says oilers are installed in engine # 353.958 and 353.959 from engine # 528 530. My engine dose # is before this so no oilers for me. I am still interested in finding out if the block is tapped for them.
I looked in my manuals last night, in the engine lubrication section. It says oilers are installed in engine # 353.958 and 353.959 from engine # 528 530. My engine dose # is before this so no oilers for me. I am still interested in finding out if the block is tapped for them.
??? could you clarify what this mean? Type 353.958 & ... 959 makes since but where does the 528 530 come into play? Course I'm not looking at a full engine number and this may be why it's not making since to me.
mmy hope too was that they were tapped and then plugged with some sort of sealing plug; no such luck
BTW i found the paperwork for my stock turbo kit, i paid some 2400 euros in 2002and installation was very straighforward and un eventful
it helped to do the electric fan refit as i mentioned somewhere else on this list, the air intake crosses in front of the engine and gettign rid of the fan pulley mechanism was nice, not sure absolutely needed as i did it before the turbo job
ive since fired it up but have yet to take it on the road, doign an engine brake install so some muffler work remaining
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