anybody know size of nylon plug 1985 gsl-se, or a after market part number, I snapped the head off and is leaking, can I use a metal plug,thanks jeff chiefhsbc@aol.com

 

just find something that is the same size and thread pitch as the plug.

 

I don't know what size it is, but I can tell you that the standard aftermarket peacock style is not the same. I tried threading one into a junk radiator I had. It destroyed the threads.

I hate the factory design where it's a "bolt" style and not a true petcock. This has always been one of mt pet peeves.

 

GSL-SE have a drain plug in their radiators? Fancy, if it was an SA, no drain plug, you pull a hose instead.

 

I was hoping to find a better answer, once I hopefully get the plug out that is weeping and the head is twisting off of the body, maybe with easy out, will need to replace before the vehicle can be run or used, or even moved. Thanks for the info, anyone else have a idea of the size/correct thread.

 

a radiator repair shop can solder in a new one.

 

Wait 12A's don't have the drain in the center iron for coolant?

And yeah stubby bolt for the win.

 

12as do have a drain in the center iron, just used mine last month.

 

Yes, there is a block drain plug on the 12A but not a radiator petcock for draining the coolant.