Help removing rusted bolts...
Team Owner
Joined: Jul 2001
Posts: 61,415
Likes: 478
From: Here to make friends
St. Jude Donor '11, '16-'17
I haven't tried this stuff, but I've been told that it's much better than anything you can buy at the autoparts stores.
http://www.kanolabs.com/
http://www.kanolabs.com/
Racer
Joined: Oct 2006
Posts: 473
Likes: 6
From: New Port Richey FL
If your actually replacing exhaust, the easy thing to do is use the good old hacksaw and cut the pipes. You could also use a cut off wheel and cut some of the old exhaust clamps off. If your dealing with bolts to the manifolds, you'll need to take a different approach. You're going to have to be more specific as to what the problem is. Are you rounding off bolts or just can't turn them. Unable to turn means you'll either have to buy a gym membership and get stronger... or get more leverage. Use a half inch ratchet and a "cheater bar" or a breaker bar. Assuming you've PB blasted the bolts and its still not turning or the heads are rounding, you may need a torch.
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Instructor
Joined: Oct 2005
Posts: 195
Likes: 0
From: Austin Tx
I have recently removed dozens of bolts from a '68 car from WI. You won't find much more rust than that, without extreme situations. 
Most of the time, all I needed days worth of PB blaster soaking, and normally a propane torch. I got almost every single nut off of the bolts that I tried. More of an issue than that was getting the bolt out of the bushings/sleeves or whatnot. The right sized tool, heat, penetrating fluid, and leverage should take care of 99% of the bolts. When you get those other ones, you have to saw it or grind it.
Most of the time, all I needed days worth of PB blaster soaking, and normally a propane torch. I got almost every single nut off of the bolts that I tried. More of an issue than that was getting the bolt out of the bushings/sleeves or whatnot. The right sized tool, heat, penetrating fluid, and leverage should take care of 99% of the bolts. When you get those other ones, you have to saw it or grind it.
Safety Car
Joined: Aug 2001
Posts: 4,883
Likes: 11
From: North Easton Mass
If what you are trying to remove is easily replaced just saw it off. If it is something that you need to preserve PB Blaster will usually free it up if you spray it on for several days. Don't force the nuts when you remove them - once they start to move keep turning them clockwise and counter-clockwise a bit at a time until they unscrew.
Some parts may be so rusted that nothing you do will prevent them from breaking.
Rick B.
Some parts may be so rusted that nothing you do will prevent them from breaking.
Rick B.
Pro
Joined: Aug 2000
Posts: 713
Likes: 1
From: plymouth mass
I agree, we have used Kroil at the airline I work at for the past thirty five years. It works!
I haven't tried this stuff, but I've been told that it's much better than anything you can buy at the autoparts stores.
http://www.kanolabs.com/
http://www.kanolabs.com/
Burning Brakes
Joined: Oct 2006
Posts: 1,006
Likes: 28
From: Lutz Florida
Worked for me too. Soak em for a few days in PB blaster. Every one came loose. The problem I had was separating the exhaust pipes. A Porter Cable sawsall took care of that.
Heel & Toe
Joined: Oct 2006
Posts: 16
Likes: 0
From: Louisville Ky
I have had pretty good luck with Breakfree.Same stuff i use on my rifles.squirt some on let it set several hours and put some more on , let it set overnight then try.Bought a gallon 10 years ago, will never run out. But as 72LS1Vette said; Some parts may be so rusted that nothing you do will prevent them from breaking.
Melting Slicks
Joined: Jan 2003
Posts: 2,817
Likes: 21
From: Somerset, NJ
PB Blaster is the best out there to loosen up nuts and bolts. Other then that a air driven cut-off wheel works great on exhaust clamps and pipe. An electric Sawzall also works great. Also a handheld grinder will do the trick but for soaking PB Blaster is the way to go. Other then all of these tools there's nothing like having a torch around to burn the rusted pieces off the car.
