Join Date: Sep 2008
Location: Fruitland Park,Florida
Did you remove the exhaust manifold to work on the broken bolt? This is necessary to properly get to the bolt. You say you used pb blaster. But did you do it properly?
The proper way to get a rusted bolt out is to spray it down, then tap it lightly with a hammer to set up a vibration. On severely rusted bolts like yours, you need to repeat the spray down & tap procedure every 3 to 4 hours. And do this over a 3 day period. Then your bolt should be ready for removal.
If bolt still won't come out, try this.
Drilling the bolt must be done carefully as you want the hole dead center in the bolt. You drill out until only a thin shell is left of the bolt. But not drilling into the bolt hole. And on the rea bolts, an angle drill is probably needed to get a good stright drill down.
You then use a very small screwdriver & small hammer to cave the outer shell of the bolt, inward. Be careful as you don't want to mess up the threads of the bolt hole. When enough of the original bolt has been caved in, you should be able to turn the bolt and get it out.
And, welcome to the forum.
Last edited by cocobolo95; 08-16-2019 at 07:31 AM.