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  #256  
Old 04-01-2021, 12:14 AM
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If one end of a small diameter stainless steel wire. Is inserted through under the crimp Piece before crimping. With the ends secured after installation. it should be enough of a safety wire setup. Perhaps not needed for years but at some point it may have to function.

At the price of pre made lines that mastercool crimping tool is great.

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  #257  
Old 04-08-2021, 05:49 PM
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The AC crimps are termed "ferrules". My 300D mostly used ones with the ferrule integral with the barbed fitting, which might be Coll-O-Crimp brand (patented?). Those can be harder to cut-off since also welded to the fitting. You can just hacksaw a ring around the OD to leave a disk of metal on the fitting. I don't know what threaded fittings M-B uses on the AC, oil cooler, and trans cooler hoses, perhaps something metric and hard to source in U.S., thus must re-use them. On my 300D, most ferrules are thick steel so harder to cut, but angling a hacksaw or grinder in works, plus prying with screwdrivers and hammers, securing it in a vise. You can get new ferrules in steel or aluminum. The steel is thinner gage than M-B used. Most modern cars have aluminum ferrules, so should work.

Only buy AC hose marked "barrier", which is needed for newer refrigerants like R-134A and R-1234yc. It has a liner which I think is Viton, so should be fine for engine oil. It also works for R-12, which flows with hot mineral oil, so "should work". Viton lasts almost as long as nylon and Teflon. If you want a smaller size hose, look for "reduced barrier". Some of the crimps in the Master-Cool set interchange, like they are marked that the #6 die also works for #8 reduced hose & ferrules (forget). I used the #10 dies for #12 reduced for the suction hose in my M-B cars, though not marked for that. Thought "should work" after checking hose and ferrule sizes in catalogs. You can also buy special "reduced" dies, but pricey.

Looks like ykobayashi has at least 1 more die than me, so a great price if $150. I planned to resell my Crimp Set after use, but like a hammer I keep finding things to use it on. It works best in a vise, but might be used in-car in a few places with a big wrench and 4 hands. When I had to re-do a hose at the AC compressor, I couldn't fit the Crimper in there, so used 2 Oeticker "stepless ear" clamps and oriented the ears 180 deg apart for best seal. The hose wasn't leaking, but I had messed up the factory tube in bending to match a Sanden. You need to research catalog dimensions to see what Oeticker clamps work. PEX ferrules at Home Depot are another possibility but also need checking dimensions.
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  #258  
Old 04-08-2021, 07:42 PM
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Zooming in I can see I used #12 5/8” Goodyear Galaxy 4826. I recall it was expensive but you only need a short piece. In my crimper I used the dies for #12.

They came out so nice. Very heavy hose. Thanks for the suggestion years ago Bill.

The new prebuilt hoses are expensive. And I’ve heard the aftermarket ones are of poor quality now. They get awful ratings online. So I was motivated to find a new type. Hose + tool came out to $200 which at the time was competitive with prebuilt hoses. But not anymore. $200 is a great deal.
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  #259  
Old 04-09-2021, 11:48 AM
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Quote:
Originally Posted by Diesel911 View Post
I believe tha max oil pressure the oil pump puts out is around45 PSI. I also believe that you are correct in saying that the oil from the cooler dumnps back into the pan and that there should be even less pressure in the cooler.
the hose has 300 PSI W.P. printe on it W.P. = working pressure.
On the GoodYear web site they have the spec sheet for all of their hoses. On of the uses for the hose was low pressure hydraulics.
Also the person I bought the hose from on Ebay sells this same hose for use in the after market oil coolers that he sells. GoodYear Insta-Grip.
Do you remember the hose size?
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  #260  
Old 04-09-2021, 12:03 PM
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Quote:
Originally Posted by runnersigh View Post
Do you remember the hose size?
I have used 5/8 regular hydraulic hose found at any hose shop. I have also used #12 A/C hose with my Mastercool crimper. The A/C hose is much less forgiving, and must be the proper length, and the natural curve of the hose oriented correctly. The disadvantage to using the A/C hose crimper, is that the entire hose assemblies have to be out of the car. With the other systems, the ferules can be cut off with the hard lines still in the car, and the hose replaced and clamped on with the various kinds of clamps. The last set I did (just last week), I used the 5/8 hydraulic hose with modified A/C hose ferules (I had to drill out the holes to fit over the barbs). They look and work great!
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  #261  
Old 04-09-2021, 12:14 PM
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Quote:
Originally Posted by runnersigh View Post
Do you remember the hose size?
That info must have been from early in my thread. On my 84 300D with the OM 617.952 Turbo Diesel Engine my actual maximum oil pressure is 97 psi. The maximum possible Oil pressure is supposed to be 110 psi and that is when the Oil Pump Pressure Relief Valve is fully open.

On that Engine the Oil Cooler Hose is 15mm inside diameter. The 5/8" hose I originally used is not a good fit.

Belmetric sells the correct Oil Cooler Hose and another member said he got it cheaper from a Posch Dealer. It is generally sold in 1 meter lengths which more then you need.

These are numbers that appear on the hose itself.
The Choline-2633 hose is the same Hose used on many of the factory built Oil Cooler hoses. The size in the hose is listed as .1300-15X23-3. The 15 is the inside diameter in mm and the 23 is the outside diameter. I don't know what the -3 means.

On the hose you will see CHOLINE-2633. 1300-15X23-3
The Choline part number is sometimes listed as 2633.1300

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Last edited by Diesel911; 04-09-2021 at 03:27 PM.
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