I have been trying to remove the battery from my 2004 Monte Carlo SS with little to no success. I can take off the support bar above the battery and I even got the positive and negative terminals off, but when it comes to the little battery holder bolt, it just won't come off. I tried a normal torque wrench, my impact gun, and PB blaster. It just won't budge. I saw some videos on YouTube and it seems like I'm doing it right but it still won't come off. Am I missing something here? has anyone else run into this issue?

 

When you say torque wrench, do you mean like a big breaker bar or like an actual calibrated torque wrench? If the latter - definitely stop that - that's for accurately torquing fasteners not for removal. Youll throw off calibration that way.


Is this one of those little like 10mm bolts into the rubber block at the bottom of the battery? If so, just put a bigger breaker bar on it - if you've got a legit breaker bar (even one of those cheap harbor freight ones), you've got more than enough force to simply shear the whole head off. Not that you are trying to do that, but if youve already soaked it with PB, you need to force it to failure then deal with it when the battery is out of the way.

Frankly I'm surprised the impact didn't tear the head off unless you had it cranked WAY down. But either way, the path forward here is simply more force - it's probably just rusted on the bottom.

 

I'll try a bigger breaker bar then, from what I've seen the batteries are notoriously difficult to takeout

 

I dunno, never had a problem personally.

Unfortunately more torque is really your only option at this point. You've already helped assist as much as you can with the PB. Next step for a stuck bolt is heat, but thats not an option on a plastic bracket / next to the plastic battery.

If your current breaker bars aren't long enough, slip on a cheater pipe on the handle. You get 2 or 3 feet worth of leverage on there, either it finally pops loose or you twist the head clean off (and it never would've come loose). But at least then you can get the plastics out of there and fix the problem.

 

Never heard these be difficult to take out, just annoying (having to remove the diagonal brace, sometimes it helps to remove the nuts holding the fuel panel to move it just a touch). But over all, pretty easy.

As Bumpin said, a big breaker bar, and/or adding a pipe over the bar to get more torque. Assuming the socket is about to grip the head of the bolt (I would wonder if the bolt is rounded after the impact).

 

Is the bolt spinning at all?

 

That's a good point!

I was thinking it's stuck so tight from rust that he cant break it loose. But maybe instead the rust already ate the spot weld on the backer nut and the whole nut is just spinning freely on the backside.

 

its not budging at all, with everything I've tried. Im planning on getting a bigger breaker bar. if that doesn't work then ill go for the pipe method

 

Not trying to be funny but make sure you're not accidentally trying to tighten it instead of loosen

 

i don't think so, it doesn't go in either direction. It completely stuck there. i think theirs a hex nut underneath it, a few days ago i was examining it and i felt a hex nut on the bottom side of the bolt. could be crazy but maybe that's whats stopping me