Oil cooler lines / compression fittings? - Page 3 - PeachParts Mercedes-Benz Forum

Diesel911 · #31 05-20-2013, 07:09 PM

Also there has been at least 2 people who have had the real but aftermarket Oil Cooler Hoses leak. They did not ruin anything just seeped at the collars.

Zoticus1 · #32 05-20-2013, 11:49 PM

I have 2 lines I removed but kept for rebuilding at a reputable hose shop in town, hydraulic line would be even better than oem and would not cost much to rebuild. you could have them rebuilt and they are really not hard to install.
just 2 cents.

Diesel911 · #33 05-21-2013, 12:48 AM

Quote:

Originally Posted by Zoticus1

I have 2 lines I removed but kept for rebuilding at a reputable hose shop in town, hydraulic line would be even better than oem and would not cost much to rebuild. you could have them rebuilt and they are really not hard to install.
just 2 cents.

Thanks, but, I have some Hose Ends already. When I pulled an Oil Cooler at the Junk Yard I ust cut the Hoses and kept the Fittings.
I also have other Vehicles I could drive if I wanted to do as you suggested.

For several weeks now I have been dealing with Rust. I have removed the lower Trim on one side of My Car and am attempting to deal with the rust holes and try to end up with a decent looking job.
When that side is done I go to the other side. So that is the work I am focusing on.

With 2 Clamps on each Hose I don't believe I am in eminent Danger. Also I have a low Oil pressure Alarm.

It is more likely I would simply replace the leaky one with the Parker Hose since the Autozone is around the corner and it does not take log to swap out the Hose.

barry12345 · #34 05-21-2013, 09:40 AM

Highest liability is hose deterioration with time allowing it to blow off fitting. Safety wire from clamp is both easy to engineer and reduces that remote possibility substantually. Actually almost totally.Some hose will soften and turn a little squishy with time. Clamps can then lose their compressive force.

With no safety wire it could then blow off. Safety wire is easily done from clamp to a fixing point upsteam of the hose. Even if it is just to another clamp placed on the remaining metal of the pipe coming off the cooler etc.

Also probably worth trying to find a source of metric size hose. If using oversize hose put it on with silicone and let the silicone dry before clamping may help avoid leakage somewhat. Use safety wires though if done this way especially. I do not know how hot oil resistant silicone is over time.

cooljjay · #35 05-21-2013, 04:35 PM

Quote:

Originally Posted by barry12345

Highest liability is hose deterioration with time allowing it to blow off fitting. Safety wire from clamp is both easy to engineer and reduces that remote possibility sustantually. Actually almost totally.Some hose will soften and turn a little squishy with time. Clamps can then lose their compressive force.

With no safety wire it could then blow off. Safety wire is easily done from clamp to a fixing point upsteam of the hose. Even if it is just to another clamp placed on the remaining metal of the pipe coming off the cooler etc.

Also probably worth trying to find a source of metric size hose. If using oversize hose put it on with silicone and let the silicone dry before clamping may help avoid leakage somewhat. Use safety wires though if done this way especially. I do not know how hot oil resistant silicone is over time.

Since there is barb on the end of the metal, I don't think there would be a danger of the hose flying off....as long as the clamps are tight...the factory crimp is just like a clamp....if there was a fear of popping off....I am sure Mercedes would have done things differently.

Agreed on getting the correct size metric hose....I wish someone would measure the existing or one of our European members would chime in on the correct size hose to use.

mach4 · #36 05-21-2013, 05:04 PM

Quote:

Originally Posted by cooljjay

Since there is barb on the end of the metal, I don't think there would be a danger of the hose flying off....as long as the clamps are tight...the factory crimp is just like a clamp....if there was a fear of popping off....I am sure Mercedes would have done things differently.

Actually, they did. The ferrule that forms the crimp is attached to the fitting itself, so it can't move. The clamps, if clamps are used, are attached to the hose, so the the clamps will ride with the hose as it slips off the barbs as the hose deteriorates. The crimp essentially has two gripping surfaces on the hose - the one on the barb and the one on the ferrule. The crimp is a far superior attachment system.

The image below isn't the oil cooler fitting, but it is of the same design where you can clearly see how the ferrule is actually attached to the fitting..

Diesel911 · #37 05-21-2013, 05:30 PM

Quote:

Originally Posted by cooljjay

Since there is barb on the end of the metal, I don't think there would be a danger of the hose flying off....as long as the clamps are tight...the factory crimp is just like a clamp....if there was a fear of popping off....I am sure Mercedes would have done things differently.

Agreed on getting the correct size metric hose....I wish someone would measure the existing or one of our European members would chime in on the correct size hose to use.

I am not sure why the stock Hoses eventually Fail. Also the Hose that has the Hot Oil going to the Cooler is often the one in the worst condition.

It could be srinkage of the Hoses under the clamps that causes the Stock Hoses to seep in that area. At least one person said they could rotate the old Rubber Hose under the crimped Clamp.

Others have had the Old Oil Cooler Hoses fail somewhere past the Cripmed Clamps.

With adjustable clamps they came be retightend but if the Hose under them is going that will only buy some time.

Besides heat vibration also must take a toll on the Hoses.

whunter · #38 05-21-2013, 07:02 PM

Engine oil cooler and hose/line issue, link thread