Broken exhaust manifold bolts

My son and many good machine shops with brains Tig weld them out.

Build a ball up on the stud once you can grab it with something cool it with air. Screw them out with your fingers. There are several heads on a pallet in the shop right now that have to be done if I am there I will video it for you all. Cooling the stud after heat from building it up shrinks it .

Most thread right out with your finger. I have seen him having to use a vice grip or weld a nut on the ball rarely. The weld does not stick to the Cast or Aluminum. Never drill them at all anymore he even does it when guys bring their cars here on trailers with the manifold off. He bought a real short end for the tungsten. Easy outs are barely used anymore at good machine shops once they have the Knowledge. Some of the things he shows me I can't believe myself until I see him do it.

Remember when you weld on the stud the current goes from the head through the the corrosion and into the stud. The corrosion turns to Powder. Cooling it shrinks the stud and Wah Lah. it come right out.

There is a head here with a thread insert in it. and one with a drill bit broke at an angle. Those heads will get filled and resurfaced and then drilled and rethreaded. Triple the cost once you try and drill it and screw up.

Old guys like me should throw the easy outs in the trash. LOL This boy is teaching me things everyday and its aggravating at times when he shows me the new ways. I am used to teaching him. But he is not always right. I still get him once in a while. LOL