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  #16  
Old 11-13-2009, 06:51 AM
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I have no idea, but here's a free thread bump.

Are the nuts on the ends of the new hoses different from the ones you took off?
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  #17  
Old 11-13-2009, 03:11 PM
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Other than holding their sides up to each other I can't really compare because I cut the old ones in a few places. My guess is they are the same diameter, and if so then why are the "screwed, nipples" smaller? Are they the same diameter for most(all?) of the older Mercedes oil coolers? I've come down with a nasty bug so nothing'll get done until maybe tomorrow or Sunday the. Maybe I can take it to a hydraulics place and have them fit the right size nuts on the hose.
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  #18  
Old 11-13-2009, 11:25 PM
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Quote:
Originally Posted by TonySz View Post
Other than holding their sides up to each other I can't really compare because I cut the old ones in a few places. My guess is they are the same diameter, and if so then why are the "screwed, nipples" smaller? Are they the same diameter for most(all?) of the older Mercedes oil coolers? I've come down with a nasty bug so nothing'll get done until maybe tomorrow or Sunday the. Maybe I can take it to a hydraulics place and have them fit the right size nuts on the hose.
I have 2 Oil Coolers on my Work Bench. 1 is a 79 300SD and the other is an 84 300D Oil Cooler. On both of them the the Nipples are threaded for 22mmx1.5 threads.
The larger end of the repair Nipples for the above models is supposed to have 22mmx1.5 threads.

Your 87 300SDL Oil Cooler Nipples and Hose Nuts may be a different size than the above Oil Coolers.
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Last edited by Diesel911; 11-13-2009 at 11:36 PM.
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  #19  
Old 11-13-2009, 11:50 PM
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May be this will help. When you remove the 617 type Engine Oil Cooler Hoses the size Wrench you need is 1-1/16 of an inch.
If you needed a larger Wrench on the 603 Engine Oil Cooler Hoses the Oil Cooler Nipples are larger.
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  #20  
Old 11-14-2009, 11:36 AM
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Thanks Diesel911. I remembered I had a whole piece of a nipple I cut off the oil cooler. I found it and the "screwed nipples" I got from the dealer are definitely smaller. It's partially my fault for not checking the size when I got them. I might be able to cut out the JB Weld and unscrew them but something's definitely not right. I'll have to somehow check the diameter when I'm feeling better.
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  #21  
Old 11-14-2009, 02:26 PM
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Well, I dragged my sick butt outside to look at my father's 300SD oil cooler. The fittings are the same size as the "screwed nipples". Apparently the 300SDL's fittings are bigger. The only thing I can think of att is to take the new hoses I got to a hydraulics place and hopefully they can fit new ends and nuts onto them that'll fit these "screwed nipples". Back to bed I go. In the meantime any other recommendations appreciated.
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  #22  
Old 11-14-2009, 03:34 PM
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You've already spent near $40 on parts and tools and the hose modification looks like another $30-40!

Too bad your this far down that road already! You could have contacted Roy here at Fastlane and see if he has a line on an oil cooler as a used part which they sometimes can and if not contact Potomac German Auto, they sell a good used oil cooler for about $100 usually, they are both great to work with by the way!
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  #23  
Old 11-14-2009, 03:45 PM
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I would call a Mercedes Dealer and see if they make Repair Nipples for the SDL.
You might need another Tap and Drill but I think it will be a better Fix than the Hydraulic shop would come up with.
You should be able to recover part of the cost of the origional Tap and Drill if you sell them.
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  #24  
Old 11-17-2009, 09:27 AM
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Thanks guys. I already contacted two Mercedes dealers and they couldn't locate any type of repair/retrofit nipples for the SDL. I've got one more thing up my sleeve before going to the hydraulics place. I'll let you know.
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  #25  
Old 11-18-2009, 01:25 AM
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Originally Posted by TonySz View Post
Thanks guys. I already contacted two Mercedes dealers and they couldn't locate any type of repair/retrofit nipples for the SDL. I've got one more thing up my sleeve before going to the hydraulics place. I'll let you know.
That will most likely be cheaper than a new Oil Cooler.
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  #26  
Old 11-18-2009, 01:56 AM
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Gotta be the # 1 all-time thankless task on a diesel MB - changing out the oil lines and cooler - made no easier by steel nuts on the factory hoses torqued onto soft aluminum threads.

In my case, replacement nipples would have done little good - the cooler itself had two holes in it, such that it was an every-other-day ritual to reach up under the bumper and wipe the oil off.

After 3 days of effort, I managed to get ONE nut to thread off the cooler. But the threads were so full of galled aluminum it wouldn't even begin to go on the new cooler. At that point I said to heck with it and installed new lines as well.
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  #27  
Old 11-18-2009, 05:15 PM
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Originally Posted by retmil46 View Post
Gotta be the # 1 all-time thankless task on a diesel MB - changing out the oil lines and cooler - made no easier by steel nuts on the factory hoses torqued onto soft aluminum threads.
It's definitely something I just can't fathom MB engineers let by.

Well, I bit the bullet and got a new oil cooler. Anti-seize on the nuts and we're good to go. I also replaced some of the small rubber tubing affixed to those small plastic tubes.

So, let this be a lesson, kids. The replacement "screwed, nipples" DO NOT fit the 300SDL oil cooler hoses!
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