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dsraven · 12-03-2017, 02:23 AM

I think the seats bolt to a sheet metal channel spot welded to the floor. that means you can't see the broken off bolt from the under side. you could tack weld a nut to the remains of the broken off drill, if possible, and try to back it out. again, a welder is required though. how about a burr on a grinder that can possibly dig out the drill. or zip disc around the hidden nut to remove the whole piece and reweld a new one in? gonna be some paint damage but again, a welder required. try a BIG drill bit, like 1/2", maybe get it down to the broken bit and then keep breaking the old bit off with a center punch till it is gone. the hole would be bigger though so, again, a welder required or possibly an insert of some sort, or drill through the second layer of the floor and install a dowel long enough to reach through the space and then use a longer bolt and install the nut on the under side of the floor.
outta ideas now,sorry.

12-03-2017, 02:23 AM	#2368
dsraven Registered User Join Date: Nov 2010 Location: calgary alberta Posts: 7,835	Re: Danny Boy is BAACK! w/ '55 Big Window I think the seats bolt to a sheet metal channel spot welded to the floor. that means you can't see the broken off bolt from the under side. you could tack weld a nut to the remains of the broken off drill, if possible, and try to back it out. again, a welder is required though. how about a burr on a grinder that can possibly dig out the drill. or zip disc around the hidden nut to remove the whole piece and reweld a new one in? gonna be some paint damage but again, a welder required. try a BIG drill bit, like 1/2", maybe get it down to the broken bit and then keep breaking the old bit off with a center punch till it is gone. the hole would be bigger though so, again, a welder required or possibly an insert of some sort, or drill through the second layer of the floor and install a dowel long enough to reach through the space and then use a longer bolt and install the nut on the under side of the floor. outta ideas now,sorry.