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  #1  
Old 12-22-2014, 01:02 PM
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Oil Cooler Fitting

I'm trying to replace the rubber portions of my oil cooler lines by grinding off the crimped connections and attaching new hose to the barbed ends using this method:

Cheap oil cooler hose replacement.

I chose this method because I cannot find replacement oil cooler lines for my '83 240D. Mine has both lines coming out of the bottom of the oil cooler, and every site I've visited (including this one) only carries the lines that fit oil coolers that have one connection on top and the other on the bottom. Mine both wind down under the engine roughly parallel to each other.

I have to do something because one of the oil cooler nipples broke off and is stuck inside the oil cooler line. My oil cooler has a removable flange at the bottom that houses the hose connectors. I was able to find a replacement flange (no easy task) so I don't have to replace the entire oil cooler. The connector on the hose, however, is ruined so I cannot use it to attach the new hose.

I could buy another line for a 240D and grind the hose crimp off it of (and hope it's the same size thread), or use a 90 degree fitting adapter that goes from the oil cooler thread to a barbed end to attach the hose to. I've googled until my eyes are crossed but I'm not sure what type to use that will fit and withstand the temperature and pressure requirements.

Anyone have any ideas? Has anyone with my hose configuration had this dilemma? Thanks in advance.
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Old 12-22-2014, 05:52 PM
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While I chose to bypass the oil cooler on the S-10 (it's a race truck and won't run all that long) the method I used for the lines should work fine for you. Check my build thread for particulars but essentially I got the fittings from Parker-Hannifin (Google for your local Parker store) and I went with push-on hose which should be fine for the pressures involved though other types of hose are available. I just made a loop so I had oil flow thru the same path as if it had a cooler.

The fittings on the engine turned out to be regular ol' metric stuff that our Parker store had on the shelf. I'm remembering that they were 14mm NON-tapered pipe which seal with a special O-ring that comes with the fitting. There's a tendency to think that M-B makes everything on their cars and that everything is somehow "special" but I've done a bunch of modified plumbing stuff on the truck and ALL of it has turned out to be standard metric fittings. The Parker store is your friend - or Swageloc store if you have one (we don't).

I just went back and looked thru my build thread. The oil cooler stuff comes up on Page 2 a bit more than 1/2 way down the page, given how my 'puter brings it up. Your results may vary (disclaimer).

Dan

Last edited by Dan Stokes; 12-22-2014 at 06:12 PM.
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Old 12-22-2014, 06:27 PM
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Welcome to the forums !
Remember you are dealing with a max pressure of about something like 60psi, its not a high pressure fuel line.
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Old 12-22-2014, 07:32 PM
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In my opinion, those later style oil coolers are pretty inefficient compared to the older bottom to top arrangement. I would of opted to replace the cooler with the older style and use the more readily available hoses.

With that said, I am pretty confident you can still get new hoses from the dealership or the classic center. Just need to provide the VIN.


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Old 12-22-2014, 08:10 PM
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Quote:
Originally Posted by DeliveryValve View Post
In my opinion, those later style oil coolers are pretty inefficient compared to the older bottom to top arrangement. I would of opted to replace the cooler with the older style and use the more readily available hoses.

With that said, I am pretty confident you can still get new hoses from the dealership or the classic center. Just need to provide the VIN.


.
I've considered replacing everything but it gets kinda pricy. Since they are routed differently I would have to get the brackets, too. Plus I can't be sure everything would fit right.

A few places tried the VIN number but could not come up with part numbers for the hoses.

When I plug in my VIN into the Mercedes EPC-net online site and go to the hose diagram it says something like "does not apply" when I click to get the part numbers.

I can see why some just bypass the darn thing but I'd rather not.
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  #6  
Old 12-22-2014, 09:13 PM
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Quote:
Originally Posted by nmrickie View Post
I'm trying to replace the rubber portions of my oil cooler lines by grinding off the crimped connections and attaching new hose to the barbed ends using this method:

Cheap oil cooler hose replacement.

I chose this method because I cannot find replacement oil cooler lines for my '83 240D. Mine has both lines coming out of the bottom of the oil cooler, and every site I've visited (including this one) only carries the lines that fit oil coolers that have one connection on top and the other on the bottom. Mine both wind down under the engine roughly parallel to each other.

I have to do something because one of the oil cooler nipples broke off and is stuck inside the oil cooler line. My oil cooler has a removable flange at the bottom that houses the hose connectors. I was able to find a replacement flange (no easy task) so I don't have to replace the entire oil cooler. The connector on the hose, however, is ruined so I cannot use it to attach the new hose.

I could buy another line for a 240D and grind the hose crimp off it of (and hope it's the same size thread), or use a 90 degree fitting adapter that goes from the oil cooler thread to a barbed end to attach the hose to. I've googled until my eyes are crossed but I'm not sure what type to use that will fit and withstand the temperature and pressure requirements.

Anyone have any ideas? Has anyone with my hose configuration had this dilemma? Thanks in advance.
Can you post a picture of the Nipple stuck in the Line?
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  #7  
Old 12-23-2014, 09:14 PM
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Here's what's left of the nipple inside the hose connector:

[IMG][/IMG]

Here's the broken flange that goes to the bottom of the cooler that I'm replacing:

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