..Heating those bolts will likely damage the rubber bushings…
I was talking about *mild* heat....not a lot. But you're right ...I agree with you ...if a guy doesn't know what he's doing.
I went back and edited out that section. Good call. That's the thing about an internet forum -- you don't know who you're dealing with on the other end. Some people (not talking about the OP) have insanely bad judgement. You tell a guy to put a little heat on a bolt and next thing you know they parked the truck over a raging campfire. "You said use some heeeeeeaaat!!!"
Slightly Unrelated Story About Questionable Judgement: Wife, kid and I were 4-wheeling in the Rockies some years ago. We were in an area up near or past the tree-line where larger rocks, loose rock ruts and the off-road mountain trails become stepped and you need to choose your 'line' pretty carefully to get through. And we're talking about 12"-18" rock steps in some cases. San Juan County. And it's a loooong death-roll to the bottom if you get off the trail. But it's also very beautiful!!
We pull over at a certain stepped-rock and rutted section of the trail to check things out, look at our line options, and enjoy the gorgeous scenery. Maybe take a wiz or get a drink of water. Well, along comes a guy in a Toyota car...of all things, threading his way up the trail going like crazy. How he made it that far IDK. I guess the trail wasn't too bad up to that point. It was actually a fairly new car, but also really beat-up for it's age. Wasn't a rental he said. Guy gets out, looks things over. My wife says to him
"...you're not going to make it past this obstacle in THAT car ..guy.". He says,
"are you kidding, piece of cake...watch me!"
Well, I figured ok, maybe this guy is one of those really super amazing off-roaders who lives local ....can pick a great 'line' and gently crawl & thread his way through places other guys can't. Even in a car. After all, he made it this far. So I figured it would be worth watching...maybe learn something. I was thinking in my mind
"Ok...well if he goes far over to the edge and..well, goes that way, then crosses over, maybe stacks some rocks *maybe* he can make it??." Wife and I move the Hummer off to the side. What does he do?? He backs way up and guns it....gets up a lot of speed and slams his little Toyota hatchback right into the f-ing steps of the trail!!!! No attempt at all to choose a line. Just a kamakazi run! Everything goes CRUNCH! And BANG!! Remember, this car had like 13" wheels on it. This obstacle section was like 30' long..it wasn't one rock! The little car bounces this way and that like a pinball and swings around. Plastic wheel cover flies off, other plastic here and there. Front bumper half hanging off. He made it like 3' into the trail. Lucky he didn't get hung up. I can see his front steel rim is all bent to heck (tire still held air), tie rod or something is making the wheel point outwards. Bent/cracked front plastic. I imagine he bent the front of the frame/body.
My wife and I, we've off-roaded for decades....we honestly couldn't believe we saw what we just saw!! Who the he|| would do that!? Frankly he had enough speed, if things went terribly wrong he risked shooting to the edge of the trail and could have rolled all the way down the mountain! He doesn't even know how dangerous it was ..what he did. We were MILES from the nearest small town and probably 3 hours from a legit hospital (and tow truck)! What was he thinking?
The guy (turns out was a city-slicker Millennial with no concept of off-roading) gets out, scratches his head...and looks at the front of his car and this more challenging stretch, and decides he's gone as far as he can go. We were surprised his little Toyota didn't bust a ball joint or sustain greater damage. I'm sure the steering was all f-ed up. He guns it with wreckless abandon this way and that, gets off the rocks and turns around and heads back w/o saying a single word...

I wouldn't believe the story if hadn't seen it first hand. The astonished frozen look on my daughters face was precious!! Ha ha.
Back to the main post...give the bolt a try working back-fourth and see how it goes. If it's not coming, maybe let some penetrating fluid soak on the threads if you can get a straw through a crack up there.
Let us know how it goes!
