Grady_Wilson
Supporting Member
Antique car guys all swear by a 1 to 1 mixture of ATF and acetone to break rusted bolts loose.Heat, heat, and heat. That area is a rust-trap for the bolt threads that point up. I soaked them in so much PB Blaster, and one of them still broke. It had probably been fused for years.
At least you'll have good practice drilling....
Actually, stock up on quality left-hand drill bits now.
The consensus is it works far better than PB Blaster.
Also, the crayon method has good reviews as well.