Pulling out old headbolts (very old) and not having good luck. Any advice so I don't snap every single one of them off?
pb aint gonna make past the head, to the block where the threads are unfortunatly. And if I look at them funny they're gonna snap!
By far my favorite is Kroil. I'm a cheap******** but this stuff is worth the money. It saves time and busted knuckles. Oh yeah you get it from Kano Industries on the web.
After you bust them is there enough to get a wrench on? knipex smooth jaw pliers are great. Just pb blast them for a few days or hours then use them to get whats left out.
Heat them up. Melt paraffin wax around the bolt heads & maybe some will run down to the threads. Try to tighten before loosening. Short back & forth movements. Pray.
Stop do not attempt to remove head studs with a breaker bar and socket , the leverage will create a shear point at the block surface and snap the stud. As suggested Kroil works best to loosen rusted studs, but PB Blaster also works well, WD 40 not so good, but you may have better luck by first taking a torch and warming the block area up next to the stud and allowing it to cool down, then double jamb nutting the stud, applying a penetrating lube and let set for 1/2 hour and then use an impact wrench adjusted to low air pressure to reverse the thread out. The hammer action from the impact wrench has a tendency to loosen the bond of the studs in the head and you have less tendency to snap off the stud.
Don't forget that most go through to water...assuming engine is out of the car, shooting a bunch of Kroil in from pump openings into inverted engine and rocking things around a bit might get more where you want it than anything from upstairs.