I am working on my integra’s front suspension, but 3 bolts are rust welded. My impact gun managed to get one off, but the others wont budge. I hit them so much that the impact bit got too hot to the touch. Sprayed with penetrating fluid, hit it with a hammer etc.
My only other option is heat, but the problem is, that it’s a wheel well and it traps heat, not to mention there is a brake hose which is very close to the area I will be heating.
How can I contain my propane torch heat to this specific bolt without damaging other areas?
Soak them overnight in penetrant and then use the biggest breaker bar you can find. 36 or 48 inch, usually 3/4 or 1 inch drive.
You could also try cutting a notch and using an air chisel to try and vibrate the rust loose while spinning the bolt.
Remember, left is loose, right is tight.
EDIT: Also, what impact are you using? Cordless half inch? Pneumatic 1 inch? What’s its reverse torque?
Also, depending on how parts have worn, you can try using a floorjack under the wheel to try and relieve some pressure on the bolt. Not a lot of lift is needed, but sometimes bushings go bad and the suspension locks its own bolts in.