This is the hose from the top of the radiator to the reservoir. Broke the nipple right off. I have a big problem with leaning on things that I shouldn't.


Has anyone had any luck with drilling this out and installing an NPT nipple or am I going to need a whole new radiator?

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1985 MB 300D/T

Fell off the WVO bandwagon when people started trying to charge $2.50 a gallon for dirty vegetable oil.

some have done it. i personally wouldn't. but you can temporarily just plug it while you find a new radiator. iirc they can be had for less than 200.

tom w

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[SIGPIC] Diesel loving autocrossing grandpa Architect. 08 Dodge 3/4 ton with Cummins & six speed; I have had about 35 benzes. I have a 39 Studebaker Coupe Express pickup in which I have had installed a 617 turbo and a five speed manual.[SIGPIC]

..I also have a 427 Cobra replica with an aluminum chassis.

My heavy hand cost me a new radiator on the wifes 300se

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85 300CD The FryrBird MY daily driver

I'm not sure what it does... I think if water in the radiator expands too much it makes it dump into the reservoir.. if that's correct, I would rather do a shabby job of adding the nipple and throwing some epoxy on it, then totally plugging it.

I'm sure not crazy about putting out 200 bucks for a system that otherwise is functioning up to par..

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1985 MB 300D/T

Fell off the WVO bandwagon when people started trying to charge $2.50 a gallon for dirty vegetable oil.

Plugging this will leave nowhere for expasion, your next problem could be a hose, or a heater core, ... better to leave it open than plug it.

Yes, I think that trying to thread and insert a nipple of another kind is a good interim fix until you get a replacement radiator.

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Gone to the dark side

- Jeff

You are still going to need a strong connection at least as strong as the pressure that the radiator cap on the fill tank with stands.IMHO

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85 300CD The FryrBird MY daily driver

i forgot there is no radiator cap on the top of the radiator in that system so i withdraw my suggestion of just plugging it.

tom w

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[SIGPIC] Diesel loving autocrossing grandpa Architect. 08 Dodge 3/4 ton with Cummins & six speed; I have had about 35 benzes. I have a 39 Studebaker Coupe Express pickup in which I have had installed a 617 turbo and a five speed manual.[SIGPIC]

..I also have a 427 Cobra replica with an aluminum chassis.

any idea what that pressure is right off hand? The epoxy I bought is rated up to 500* but no pressure is listed.

I bought QuickSteel (steel reinforced epoxy putty) it sounded good to me....

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1985 MB 300D/T

Fell off the WVO bandwagon when people started trying to charge $2.50 a gallon for dirty vegetable oil.

The pressure is caused by the rise in temperature of the coolant, and is regulated by the cap, either on the radiator or on the coolant recovery bottle. Typically I think pressure caps are rated at between 8 and 16 PSI. You really need a well sealed system to make it function correctly. If you remove the cap and get no pressure, then when the system cools down you will also not have a vacuum to pull the coolant back into the radiator. I would certainly make an effort to re-attach that hose with epoxy. Liquid steel or JB Weld, are both excellent for the purpose. Clean the surfaces very well, then attempt to roughen the surfaces up that you are going to apply the epoxy too. I think if you work it right and carefully, you will get it done.

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Junqueyardjim
Christianity, if false, is of no importance, and if true, of infinite importance. The only thing it cannot be is moderately important. C.S. Lewis



1983 Mercedes W123 240D 4 Speed 285,000 on the road with a 617 turbo, beautiful butter yellow, license plate # 83 240D INDIANA

2003 Jaguar Type X, AWD. beautiful, good mileage,
Mom's car, but I won't let her drive it!

I don't really think that epoxy is going to be strong enough to just reattach that hose. It was a clean break..

I was planning on either drilling out a hole and then using a thread in nipple, or drilling out a big hole and epoxying in a nipple that has the barbs on each side.

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1985 MB 300D/T

Fell off the WVO bandwagon when people started trying to charge $2.50 a gallon for dirty vegetable oil.

why cant u just put a smaller hose in the hole?

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82' 300SD

Been there, drilled it out and found that there wasn't enough plastic there to thread anything in. Used JB weld to reattached the broken part. Works so far (about a month)

This hose allows the air to go back to the resevoir and the resevoir will over flow like you have too much water if air can't return. Don't ask how I know

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1977 300D Lost coolant while someone else was driving
1983 300D Can't run without oil
1985 300SD (gone but not forgotten)
1990 300TE 4matic Sold
1991 Yamaha Venture
1975 Kawsaki 250 triple
1974 Honda 200CL
1951 8N Ford
2008 Wildfire 650C

Thse hose doesn't go into the hole, there was a nipple coming out of the radiator, but it broke off flat.


MB Owner, thanks for the look out. Can I see some pictures of your work? mine is broken off so that I don't think I can reattach it.

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1985 MB 300D/T

Fell off the WVO bandwagon when people started trying to charge $2.50 a gallon for dirty vegetable oil.

Why not take the nipple shove a hanger thru it and use that as a splint for the JB weld?

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http://superturbodiesel.com/images/sig.04.10.jpg
1995 E420 Schwarz
1995 E300 Weiss
#1987 300D Sturmmachine
#1991 300D Nearly Perfect
#1994 E320 Cabriolet
#1995 E320 Touring
#1985 300D Sedan
OBK #42

That's a fantastic idea... I am just not sure if I will have enough space to actually attach the hose after the JB weld..... Do you think I should mate the two broken surfaces back together or leave a bit of a gap?

Should I do it with the radiator hot or cold?

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1985 MB 300D/T

Fell off the WVO bandwagon when people started trying to charge $2.50 a gallon for dirty vegetable oil.