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Old 06-30-2010, 01:40 AM
LaRondo's Avatar
Join Date: Oct 2006
Location: West Coast
Posts: 162
W126 300SD leak at radiator drain plug

I discovered a little coolant under the parked car the other day. It's not much, really.
A closer look showed it's coming directly from the drain plug, which seems to be a plastic (blue) plug.

Does anybody have experience with this, how to best tackle it without making it worse or even break something?

Is there a special tool required to turn this plug. It seems slotted deeply for a regular screwdriver.

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Old 06-30-2010, 09:41 AM
69shovlhed's Avatar
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Join Date: Apr 2010
Location: Sterling, VA.
Posts: 286
use a regular screw driver w/ a wide blade. i have seen damaged o rings on drain plugs from the factory, and i think you can buy a new drain plug for it if the plug is damaged. if its just an o ring, put a little vaseline on the new ring when you put it back in.
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Old 06-30-2010, 09:49 AM
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Join Date: Sep 2004
Posts: 8,671
Originally Posted by LaRondo View Post

Is there a special tool required to turn this plug.
A one cent tool should work. Or, for a little more money, you can upgrade to a nickel.
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