I've completely removed everything except the pivot bolt on the alternator from my 1967 Mustang 200 ci engine. It pivots freely, and nut is off the aft end, but the bolt refuses to budge. Cannot turn it with a wrench and cannot drive it out with a hammer. Heat is next, but am wondering if there is something I'm not thinking about here.

Any suggestions?

 

sounds like the rust/aluminum oxidation mighta locked the bolt into the aluminum...good luck.

In the past, Ive had a few kinda similar issues, sometimes drilling a small hole from about the midpoint of the seized area thru and partially into the side of the bolt, then hitting it with wd40/pb blaster/kroil/whatever you have, will let oil wick deeper into the problem area to help free it...heating/cooling with oil can help it draw oil in too, just dont catch the oil on fire

a 1/8" hole in the side of the cast ear might not be prettiest thing, but shouldnt ruin anything either...

 

Fortunately, the bracket holding it to the engine wasn't as tough, so I removed it, soaked it with Mouse Milk and then put it in a press.

If it doesn't work by tomorrow, I am cutting and fabricating stuff.

 

Rather than a press, I'd hold the alt bracket in a vise and use a lower powered impact wrench or electric impact driver to turn the bolt until it would spin freely and come out. An air hammer to drive it out would also break the corrosion bond. Although it could damage the bolt. With a die casting though I'd turn the air pressure down. The press may need to apply a lot of force resulting in breaking the die casting before the bolt moves. The impacts can be sharp but without the steady load that could crack the casting.

IME, which was with suspension bushings, I would use the impact, then the air hammer, then reapply more PB Blaster, then do it again over and over again until they finally came out. Of course being suspension bolts in bushings I wasn't reusing I could hit them with full power, and full size air powered impact wrench. Inside a die casting will take greater care but the basic method should still work. I'd start with an electric impact driver and go up from there carefully if it didn't work with repeated cycles.

 

I've decided the bolt is $2 and the core is worth $5, so I am not really caring if I save anything except the bracket. Just not worth my time. Gonna clip it with a grinder.

 

It's just seized. You aren't missing anything. Soak it the best you can with WD40, wait a day or so, then get a longer wrench and mess with it til it turns. It'll come out then.