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Old 04-13-2006, 02:00 PM
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Join Date: Jan 2006
Posts: 134
Radiator neck question.

Hi all,

I had the typical mercedes Behr radiator disaster happen to me last year. I have been getting by with the hose attached to the nub of whats left at the top of the radiator. I am but a poor college student and a new one is expensive. I did find a junk radiator with a good neck and I managed to unbend the metal tabs and the whole plastic top of the radiator came off in one piece. My question is how hard is it to put one back on? Will I ever be able to bend the tabs on my 83 300SD radiator back into place so it wont leak?


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Old 04-13-2006, 03:10 PM
clint77002's Avatar
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Join Date: Mar 2006
Location: North Texas
Posts: 102
Radiator neck

Its a simple repair. I did the same thing on my 123. I got a kit from fastlane (or **************, can't remember). Its a joint of copper pipe the same inside diameter as the upper radiator hose. Clean the radiator neck w/ brake cleaner and rough it up w/ 80 grit sandpaper. Clean the copper tube the same way. Apply a 2 part epoxy (white and black is what I used) to the inside of the neck and the outside of the copper pipe. Insert the dopped up pipe into the radiator neck and let it set over night. Reattach the radiator hose. It works great and offers a stronger place to tighten the radiator hose to.

81 300D N/A 130K miles (Nelly)
87 300D Turbo 80K miles (The Scalded Dog...because it runs like a scalded dog)
95 e320 Wagon 104K
2003 Sprinter 47K miles.
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One beautiful low miles wife (who likes diesels) (that's my wife holding the sign)

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Old 04-13-2006, 08:17 PM
Diesel Giant's Avatar
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Location: Loganville/Atlanta
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I would think that taking off the top tank and reinstalling it, it would leak.
1981 300D 147k
1998 VW Jetta Tdi 320k
2001 Dodge Ram 2500 141k
1979 300D 234k (sold)
1984 300D "Astor" 262k(sold)
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Old 04-13-2006, 11:04 PM
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Join Date: Sep 2004
Posts: 8,730
Radiator shops replace tanks routinely. But they have the equipment for the job. The probability of a successful outcome for the DIY mechanic is just about zero.
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Old 04-13-2006, 11:17 PM
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Join Date: May 2005
Posts: 992
well my friend

well my friend i would like to congratulate you... you improvised, adapted and made a way where there seemed to be no way....

1. you should have just put the other radiator in...but since you havent... there are a ton of radiator shops... just take it to them and they will do it for you and probably charge you 50 bucks....

until you have the 50 bucks just epoxy a cooper pipe in place....

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