Battery removal issue

Soak it with penetrating oil for a few days,

Get a good grip on the bolt shank with a clean pair of vise grips & turn in unison with the cable. (making sure that the other cable is disconnected. (potential for sparks if you ground)

It is quite likely that at this juncture you will rip the internal connections free from the plate destroying the battery internally.

Do NOT try and heat the bolt (think hydrogen gas).

If you have any bottled liquid nitrogen you can "try" applying that, but be careful you don't damage the battery case resulting in a small acid leak destroy the body below the box.

I'd say, take a sawsall, cut the cable at the bolt, remove the battery & replace with a "new" battery & connector. You'll be doing that one of these winters in a parking lot if you don't, might as well now while the weather is nice.

PS hitting the battery with a hammer may damage the battery, think sulphuric acid in a plastic case with a semipermanent lead seal. Local wreckers sell used batteries tested for $20.00 with a warranty, Just a thought.

I had something like that once. Baking soda solution cleans it up pretty good too. Finally the battery terminal broke off and then was able to get the cable loose from it. . Ended up the connector was so badly corroded I decided to replace the whole cable. If you can get it loose you might get away with just replacing the bolt in the connector.

try pouring some coke over wher ethe corrosion was/is, the get a wash cloth soaked in coke and wipe it down, then get a damp cloth to clean off the coke.

Can't you just take a small cutoff wheel and cut the bolt?

I assume we're dealing with a side terminal battery since its a GM product. The bolts are replacable in the cable so no need to cut the wires. You can get the bolts at any auto parts place.

Try to break the bolt off by over tightening it. This is going to mean you'll need a new battery but if you think its the original 1995 battery, thats not a bad thing.

Thanks for all the suggestions everyone. But I had some luck today. After soaking the bolt down really good with more Liquid Wrench after getting fed up with dealing with it on Tues. evening, the thing came right off this afternoon with vise grips. Same technique as before that had failed me. The bolt was worthless though, so I picked up a new one at an Advance Auto Parts store. They come in pairs. Only cost me $2.12 with tax--and the new battery is now installed. Car starts right up and all is well for now. YAHHHOOOOOO!!!!!!

S.T.

FWIW, You can use a regular bolt in there, but you need to be easy on the torque... they use small heads so you'll strip the bolt before wrecking the battery, but if you're stuck I think it's a 3/8 or 5/16" bolt. When I've had to use that method I use a stubby wrench and go easy on it...

Ray