Torch and pb blaster
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Junior User
Joined: Nov 2015
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Torch and pb blaster
I am trying to remove my drivers side manifold myself. I have been spraying the nuts w pb blaster for 3 days. I was also planning on hitting it w a torch. How long do I need to worry about the blaster being flammable?
Lead Driver
Joined: Mar 2013
Posts: 7,460
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From: Kent Station, WA
Not sure on the flammable rate of PB blaster. Are you using a Propane or MAP gas torch?
Aerokroil is rated higher but more expensive then PB Blaster, you can also use ATF/Acetone in a 50/50 ratio which is stronger then both, need a all metal contaier for it though.
Have you purchased any stud extractor's? What engine? Guessing a V10.
Aerokroil is rated higher but more expensive then PB Blaster, you can also use ATF/Acetone in a 50/50 ratio which is stronger then both, need a all metal contaier for it though.
Have you purchased any stud extractor's? What engine? Guessing a V10.
Lead Driver
Joined: Mar 2013
Posts: 7,460
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From: Kent Station, WA
Thread Starter
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Junior User
Joined: Nov 2015
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Good ideas, thx, but back to my original question, when is it safe to use torch. Should I wait an hour, day, week after using on blaster?
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Fleet Mechanic
Joined: Dec 2015
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From: Washington Coast
We heat bolts (not that small) cherry red and as soon as it start to go black spray the daylights with Kroil, the heat will draw it down the threads.Smokes a ton but no flames. Also rap on it right after with a hammer. Heat it 3 times. If that doesn't work get some wax, bees wax works best and heat it again and touch the wax to it and it'll draw in and help lubricate the threads.
Fleet Mechanic
Joined: Jul 2003
Posts: 1,815
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From: Houston
It is safe to heat it with a torch right up until it catches on fire.
Seriously...you could just test it on something else. Spray it...let it sit a bit and then heat it with a torch. Make a mental note of how long it takes the heat.
And have something on hand to put the fire out just in case. I have also had good luck breaking bolts/nuts loose by tightening them and then loosening them. Good luck man.
Elder User
Joined: Sep 2016
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Keep a spray bottle of water handy to extinguish any flames. It will ignite, and it won't cause any damage unless there's wiring or plastic very close by. Also, wet rags are great for protecting things from flames. I'm a welder. Don't ask how I know.
Also, I use the atf/acetone mix but I just keep it in a lab type polyethylene bottle. It works well, and it's cheaper than sprays. I've had some trouble getting the mixture to dissolve however and usually need to shake it up while using.
Also, I use the atf/acetone mix but I just keep it in a lab type polyethylene bottle. It works well, and it's cheaper than sprays. I've had some trouble getting the mixture to dissolve however and usually need to shake it up while using.