Spotweld drill bit

[Kansas 914]

I am going to do a full floorpan replacement and need to know what size spotweld drill bit I need.

I did some research here and I think Blair bit is the way to go - just need to know what size I need.

TIA - Mike

[Zeke]

You are probably going to go thru more than one bit. You could order several small bits of the same size from a quality supplier like McMaster
Carr and some just a little bigger than the weld itself (which will vary in size). Drill thru the center of the weld as a pilot and then start the bigger bit. Once thru the first body part, it should separate looking much like you used a spot weld bit. Try to buy the larger bit with a flatter point profile; some are really too steep and will go thru before the parts separate. As i understand it, the spot weld bits are spendy. You can buy alot of common bits for the same $. You'll need 'em.

[Rich Hilgersom]

I would not bother with that method.

Just sawsall the floor near the welds and remove the centers in 4 sections. Then grind the welds off from the bottom.

This method was quicker for me and it left nice clean metal behind without the swiss-cheese look of the spot weld bits.

The other trick I did was to brace the new floor with a wet 4x4 piece of wood on a floor jack. It kept the floor flush to the car well.

When I was done it was really really wierd being in a 914 without the oil-can popping sounds of the floor


-Rich

[Zeke]

Rich, that sound like a plan.