Have read the great thread that mach4 put on here for his oil cooler line fix. I also need to make a repair and want to know if you guys can tell me the hose dia I need and temp/ psi. I don't want braided hose .

I would appreciate since this my daily drive I want a simple quick fix. I really am afraid to but new lines for what I might end up with.
The removal off the crimp and good fit on the and clamp will do the trick.
I read some of the comments others posted about this approach and I'm not really interested in that kind of dialogue I want to get this took care of before next cold snap.
Thnaks,
greazer2b

You ought to pm mach4 and ask what size Hose was used.

The only Vehicle there is extensive stuff on 617.952s Oil Cooler Hoses but not on the other Engines. You did not say what you planed to do the job on.

I believe the original size of the Oil Cooler Hose is 15mm ID buy The colsest US size is 5/8" ID and 5/8" is a little loose.

There is at least 3 long threads on the Oil Cooler Hose replacement.
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84 300D, 82 Volvo 244Gl Diesel

Yes I read your thread and also pm mach4 but he didn't seem to remember the sizes. I am doing the work on my 85sd . What is the psi for the lines I can't believe it is to high but the temp is what I am concerned about.
Any suggestions and info will be much appreciated.
Thx,
gerazer2b

The size of the hose I used was -10. In the AN world the -10 is the size in 16ths of an inch, so 5/8". I should add that this is the OD of the hose, not it ID - the ID can vary depending on the wall thickness of the particular hose used. However the hose I used was designed to work with the -10 AN hose fittings I used. On the cooler end I drilled and tapped the cooler for 1/2NPT and then used a 1/2NPT to -10 adapter. On the lines I brazed on -10 steel fittings after cutting off the MB barbs. One should not use steel braided lines with hose clamps. I don't know what hose size members have used when they elected to use hose clamps with the stock barbs (I could look it up, but I'd lose my post since I'm on an iPad) Since installing my oil temperature sensor which takes the temperature on the line TO the cooler (which is the higher of the two) the highest I've seen thus far is about 190 while normal around town is about 150. I don't know what the highest design temperature is.

This may help



Hope that helps.

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Current Stable

• 380SL (diesel)
• Corvette C5
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• F350 Powerstroke
• Auburn Boattail Speedster replica

If you want a hose approved for this very purpose in aviation, use MIL-H-6000D-10. Its what we use on oil cooler lines in general aviation. Kind of like really good heater hose in that it still bends easily. Not steel braided. You can get it from a place like Aircraft Spruce. aircraftspruce.com

That's a nice fix. Overkill in my opinion but not a bad thing to overkill on. I have an sd in my drive I got back from my buddy after he drove it for a work truck for years. He just uses rubber oil hose from a hose supply house and cuts off the old crimped on hose and puts clamps new rubber hose on. You end up with something Just like the power steering return hose. Use good clamps , check them every now and then , use two clamps on each end to be sure. Oil psi is 3 bar or 43 psi. Maybe it's a bit higher than gauge will read. It's still going. I did this to a 1993 2.5 about 4 years ago and it's still going. So there is a real quick fix for you.

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What Would Rudolph Do?
1975 300D, 1975 240D, 1985 300SD, 1997 300D, 2005 E320 , 2006 Toyota Prius

The highest Oil Pressure possible if the Oil Pressure Relief Valve in the Oil Pump on an OM617.952 is 110 psi.
I cannot remember what the temp is on the Oil Cooler thermostat when it is fully open but it is hotter then you think like 220-250 degrees F.

If it is a regular Hydraulic Hose it will have the Working Pressure on the Hose with a number in pis followed by WP(Working Pressure) I gues that is only on US Hoses.

That was good info on the sizing of the AN Hoses. The companies that make the Hoses have websites and you can look up the specs.

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84 300D, 82 Volvo 244Gl Diesel

Thanks for the help I was concerned about the psi and temps.
greazer2b

How much of this changes if we're takking om616 engines?

Also, do the hydraulic fittings create pressure drop issues?

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Current Diesels:
1981 240D (73K)
1982 300CD (169k)
1985 190D (169k)
1991 350SD (116k)
1991 350SD (206k)
1991 300D (228k)
2008 ML320 CDI (199k)
1996 Dodge Ram CTD (442k)
1996 Dodge Ram CTD (267k)

Past Diesels:
1983 300D (228K), 1985 300D (233K), 1993 300D 2.5T (338k), 1993 300SD (291k)

It will not if the ID of the Fittings and Hoses are the same as the originals.

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84 300D, 82 Volvo 244Gl Diesel

As long as your hoses don't meet with trauma, there's no reason to require braided hosing. Especially if there's rubber hose under the braiding. BTDT with fuel lines on my various diesel engined trucks I've owned.

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'06 E320 CDI
'17 Corvette Stingray Vert

Don't use heater hose and expect it to last a long time. The hose has to be rated for hot engine oil. Ask me how I know...

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1991 F250 super-cab 7.3 IDI. (rebuilt by me) Banks Sidewinder turbo, hydroboost brakes, new IP and injectors.
2003 S430 - 107K
1983 300SD - Tanoshii - mostly restored ~400K+.
1983 300SD - Good interior. Engine finally tamed ~250K.
Monark Nozzle Install Video - http://tinyurl.com/ptd2tge

The Oil Pressure Gage is deceptive because it stops at 3 bar. When I put a test Gage on My OM617.952 I got 97 psi when I revved up the Engine and that hot or cold.

The Oil Pump Relief Valve opens at 110psi.

I don't know what the Oil pressure is on the Newer Engines.

I uses Parker Power Steering Hose on My Chevy Van Oil Cooler. I got it at the local AutoZone. I ask the Guy and He said they have 5/8" also. But, I did not investigate further.

As I said before Hose companies have websites and you can look up what the Hose can be used for, temp and pressure.

When I posted My thread on replacing the Hose I was criticized by some as they said it was unsafe to use clamps. But, the majority of the aftermarket ad on type Oil Coolers use Hose and worm gear type Clamps.

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84 300D, 82 Volvo 244Gl Diesel

If someone wants something better then adjustable Clamps they can use 2 Oetiker type Clamps that you crimp on.

Last Year when I replace the Hose on Mine I use the Oetiker Camps on the Oil Cooler end but used 2 Norma Clamps (cooljjay found them on eBay) on the side going to the Oil Filter because there was no room to fit the Tool I used to do the crimping.

See post #130 for the pics opf the Oetiker Clamps.
Cheap oil cooler hose replacement.

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84 300D, 82 Volvo 244Gl Diesel