Plastic Radiator Drain Plug
I just changed the coolant/antifreeze in my 1984 300sd and while tightening the Plastic Radiator Drain Plug, the head broke off, due to the cold weather. I figure I have to drill out the the rest of the screw, but I was wondering what the radiator threads were made of, if drilling it out might damage the radiator itself. Any suuggestions?:confused:
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I had a similar experience recently with an SUV.
I "carefully" drilled a small hole in the center, then used an EZ-Out to get the loosening process started. If you damage the threads, some sort of repair(depending on severity) will be required. To me the trick here is accessibility....can you get a straight shot at it from underneath. If not, pull the radiator. |
The plug at the bottom will come right out. Easiest way is to heat a SMALL slotted screwdriver red, and let it "melt" a slot in the CENTER of the blue screw. Good luck......
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Thanks for the suggestions. Someone else suggested using a much smaller diameter screw die, which on backing it out will grab the plastic.
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That same thing happened to me, but it was like 70F outside. I just released the lower radiator hose.
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