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Old 02-03-2005, 01:04 PM
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Join Date: Feb 2004
Location: Ontario, Canada
Posts: 483
Question My Rad. Has No Drain !!

Went to drain the coolant in my ,87 SDL last night and found that there was no drain on the lower Radiator housing. I mean none, not even a bolt or bushing.
The rad. is a replacement OE Behr that was installed by the PO in 2000.
I had to remove the lower Rad. Hose to drain the coolant - very messy
The manual shows a drain plug but it definitely wasn't there on mine.
Has anybody else come across this

1991 M-B 560SEL Arctic White/Grey 99,000 Miles
1987 M-B 300SDL Ivory/Palomino 229,000 Miles (sold but never forgotten)
2006 Volvo XC70 Blue/Beige
1999 Porsche Boxster Arena Red/Savanna Beige
1972 Porsche 911 Viper Green/Black
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Old 02-03-2005, 02:01 PM
Join Date: May 2002
Location: Blue Point, NY
Posts: 25,396
I've got what appears to be a replacement Behr in the SDL (installed by PO) and it does have the drain.

Are you sure you are looking for the right thing? It's a plastic threaded piece that is recessed in a cavity. You have to get underneath the vehicle to see it. I seals with an o-ring (that I now believe has to be replaced on mine. )
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Old 02-03-2005, 02:19 PM
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Join Date: Sep 2003
Location: Manhattan, KS
Posts: 596
The first time I drained mine it took a little looking to find it. It seemed like the sheet metal under the radiator had been bunged up a little so the access hole for the drain wasn't exactly centered on the drain anymore. Maybe that is the case with yours??
Keep everything as simple as possible-but no simpler--Albert Einstein
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Old 02-03-2005, 02:27 PM
jbaj007's Avatar
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Join Date: Jun 2001
Location: Santa Monica, CA
Posts: 2,053
It's usually very blue in color.

The Golden Rule

1984 300SD (bought new, sold it in 1988, bought it back 13 yrs. later)
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