removing 617 oil cooler lines - PeachParts Mercedes-Benz Forum

coachgeo · #1 06-23-2003, 01:25 PM

Sorry for asking but I dont have a manuel yet. Kinda if possible looking for an ASAP answer.

After watching my engine temps get up to 230F in the early summer heat I decided there is no way I can keep the oil cooler bypassed. I found a shop that fixed my oil cooler. $20.00 YEAHHH.. even the after markets coolers were starting at $150 and up and since I dont yet have a job!!! I was estatic to get it fixed like this.

Anyway... Now I have to have new pressure lines made so I need to remove the lines that are on it. Mann.. dats going to be a PIA. I have less than an inch between the cooler lines and the wall. Oh well..... gotta do what tya gotta do!

What's the procedure for pulling these lines? Do I have to drain all the oil then proceed or just crack the oil filter housing to reduce pressure. This I assume would mean that when removing hoses I loose the oil that was in the housing and hose. This correct?

Thanx in advance...... and since he welded the cooler today instead of me having to wait....... I hope to get working on the hoses today too ... so Im in sorta of an ASAP mode..

rickg · #2 06-23-2003, 01:42 PM

I know someone here did a write-up on doing that job awhile back. Try a search here in the diesel forum and see if it'll come up. And yes, I remember them saying it was a real PIA!
PS: I seem to remember that Greg Samuelson did that job on his TD.

coachgeo · #3 06-23-2003, 01:54 PM

Here I am CAUGHT! ...... a bulletin board moderator that preaches to newbies all the time "use the search button" and Im not practicing what I preach.

Spank me wid a 2x4...

Thanks... I will search and let the forum know what I find.

coachgeo · #4 06-23-2003, 02:07 PM

Here's what I found unfortunatly questions I have are not answered.

http://www.peachparts.com/shopforum/diesel-discussion/42718-oil-cooler-hose-replacement-tips-post424306.html#post424306

I have added my question to that post. So all answers shoulp probably be defered to that post for archive purposes.

Zoonhollis · #5 06-23-2003, 04:50 PM

I remember a recent thread regarding these oil lines, and the possibility of replacing them with the steel braided type. This would apparently abrogate the need for the knotty replacement of the rigid hoses. There was much controversy in this suggestion, mind you...

jassz · #6 06-23-2003, 05:27 PM

First of all, if there are any small children around, you need to practice saying, "My, but that is a dreadful annoyance!". Alternatively you can learn a few German swear words. Next, look at your hands and say goodbye to the skin on your knuckles.

Yes, the job is a PIA. My husband had to machine a couple of wrenches in order for them to fit in the small workspace. He made them shorter AND narrower. No doubt there is a Mercedes tool just for this. He also managed to wreck one hose because it was twisting and he didn't realize it was twisting. Fortunately that wasn't a hose we were keeping. I think you need to hold one spot with a wrench to keep it from twisiting, then use another wrench to turn with.

He drained all the oil out first. Even then it's a messy job.

Good luck!

Natalie

rickg · #7 06-23-2003, 05:39 PM

One of my hoses is just starting to seep a bit. Just enough to coat the first couple inches with oil, but no drips yet. So, I'm gonna have to do something with it eventually. I've been debating whether or not to tackle it my self, or pay someone the big bucks to do it. Any ideas at what a indie shop charges for this job? I don't mind working on my own car, but when a job is a major PIA, I'd rather pay someone else to skin their knuckles and learn new german swear words!

jassz · #8 06-23-2003, 05:45 PM

rickg, we were quoted 2hrs for this job. That was AFTER it was done, and by then 2hrs looked like a bargain. It took hubby most of the weekend.

jerryb · #9 06-23-2003, 09:00 PM

I just went through this about 6 weeks ago. My advice, buy the M.B. lines and undo the motor mount to install.
I was determined To have hoses made and did get it done, but it cost almost as much as factory, and still is not quite right, it's very hard to route the hoses so they don't rub on something.
The fittings are real oddball and have to be ordered, they have a weird taper on the flair, and the thread is not JIC or Metric.

coachgeo · #10 06-23-2003, 10:07 PM

Quote:

Originally posted by jerryb
I just went through this about 6 weeks ago. My advice, buy the M.B. lines and undo the motor mount to install.
I was determined To have hoses made and did get it done, but it cost almost as much as factory, and still is not quite right, it's very hard to route the hoses so they don't rub on something.
The fittings are real oddball and have to be ordered, they have a weird taper on the flair, and the thread is not JIC or Metric.

UH OH......... THANK YOU. The engine was hot, too hot so I couldn't do anything today. Man they hold their heat for a long time.

THANKS for the heads up. The uh oh is because this thing is FAR from stock. I do not know if the oil cooler lines are longer or shorter than normal. It is a different oil cooler too (newer one... 1993 if I remember right) so I'm not sure if those fittings are match to the 617 either. hmmm.... I can find out though there is a junk one near here. Think I'll go cut out the fittings so I have them as spares. The car was in a train wreck LITERALY so I miiiiiight be able to get too the cooler lines on the filter housing . Will see.

As to motormount.... those are different on mine too. Will have to look and see if this is still an issue.

coachgeo · #11 06-24-2003, 10:30 PM

Well. Either I got some Irish luck today orrrrrr..... I got the bennefits of a cunning Unimog engineer who new someday someone might put a 617 motor in a 404.1

Here is what the nightmareish space I was expecting to have fought with. This is with the hose removed, butttttt it ended up EASY

HOW U ask?

coachgeo · #12 06-24-2003, 10:34 PM

See the ugly white doghouse wall that is in my way..

WElll.... NOW YOU SEE IT!!!!

coachgeo · #13 06-24-2003, 10:36 PM

NOW U DONT

coachgeo · #14 06-24-2003, 10:37 PM

Had to go buy new wrenches

coachgeo · #15 06-24-2003, 10:47 PM

Found out the hose ends are
15mm and 1.5 thread pitch
Seems both ends are this thread and pitch

I got the two cooler ends done as elbows. Better for my application. I think stock is one hose has an elbow and one does not.

I don’t know about the flare fitting correctly I forgot to have him check that. I'll call tomorrow before they build the hoses. They were minus one fitting and had to order it.

I went with a shop making them cause yes....... as stated earlier the prices are about same as MB buttttt. I think mine may be a little longer. Maybe not but just in case I went with having them made to the lengths I need instead of guessing that they were stock lengths. (mine were cut and spliced together to bypass the cooler while I was driving the Unimog so I don’t know the originally lengths. I did not think to keep the pieces I cut out. I did keep all the fittings though. )