how to use a propane torch?

[rbh]

Re: how to use a propane torch?

^^^^^^

Yea I know
But I was going off post #1 not post #9.

 

[jbjennings]

Re: how to use a propane torch?

Well, my opinions:

If you use oxy/acetylene (I know you weren't, but more heat was mentioned), your aluminum alloy block will likely be in a small puddle at your feet.

The propane flame is not a lot hotter than the melting point of aluminum, and therefore harder to get a decent size piece of aluminum hot enough to melt since aluminum conducts heat so well. However, if you get the aluminum too hot it will turn into a liquid with NO warning whatsoever. Aluminum doesn't begin to glow like iron before it melts, nor does it soften much before it hits the melting point and turns into a watery liquid.

I would try some atf/acetone mix (yes it will ruin the paint but as said, it will be well worth it) but like John told you, if you twist too hard, it will break. DON'T use a breaker bar on those tiny bolts!!!

I have had luck heating the bolts up and getting them out. I don't believe it will hurt to put the propane to it, let it get hot, then cool it quickly with a shot of pb blaster. Don't let it ignite any fuel or pb blaster!! I believe getting it hotter than operating temp and cooling it really quick can break up some of the corrosion.

It's all up to you. If you've already had bolts on that thing seized in other places, there's a good chance you'll be drilling and rethreading. This motor may be TOUGH to fix.
Good luck,
JBJ

 

[Alpheus]

Re: how to use a propane torch?

I believe in the acetone/ATF mixture. It works. Another trick I use on exhaust bolts is candle wax. I heat up the bolt almost red and hold a candle onto the bolt. The wax melts and wicks in between the threads. It lubes them up and almost works every time...

 

[coolguy147]

Re: how to use a propane torch?

yeah, i got the powerhead off today the compression checked out just fine with 135-135-138(was 120psi but i added some wd-40 and it went up)-135

took the water jacket off.

put a wrench to all of the exhaust manifold bolts. just a tiny nudge to loosen them up. then i put wd-40 on each bolt

what about heating around the bolt and putting a shot of cold air (compression air can upside down?) on the bolt?

or just using the compression air can upside down?

is it possible to warp the block on a old mercury with no head?

 

[sturdavj]

Re: how to use a propane torch?

Cool:

If you want to start another mega post ask about using anti seize on you head bolts, pre-assembly

I use a product made by LocTite, with a copper base made to withstand up to 1200* F

 

[Tubingluvr]

Re: how to use a propane torch?

A little known secret about removing rusted bolts........BEES WAX!!!!!
Yep thats right put bees wax on those rusted bolts and walk away, come back in 24 hours and you should be able to turn those bolts by hand

 

[coolguy147]

Re: how to use a propane torch?

A little known secret about removing rusted bolts........BEES WAX!!!!!
Yep thats right put bees wax on those rusted bolts and walk away, come back in 24 hours and you should be able to turn those bolts by hand

lol? is this legit

i might try the candle wax idea. heat the bolt and melt wax onto the heated bolt?

 

[coolguy147]

Re: how to use a propane torch?

i took a looks at the motor today. i have 3 bolts that a have a little bowl around them. still had wd-40 in them. i went and turned each bolt just a tiny bit and applied more wd-40. 1-2 bolts didn't budge but it's cool.

one bolt made a crack or kinda sounded like it was breaking? i didn't put much force on the bolt. do you think it was just the corrosion breaking off? i've broken 5 bolts of the same dia. it's takes a little bit more force to break.

 

[dolluper]

Re: how to use a propane torch?

Ifin you hear the crack spray it then tighten it....then try to lossen a bit and spray then tighten it.....this process is slow but it works it moves out more each time and gets easier to move each time

 

[coolguy147]

Re: how to use a propane torch?

Ifin you hear the crack spray it then tighten it....then try to lossen a bit and spray then tighten it.....this process is slow but it works it moves out more each time and gets easier to move each time

lol i just left it and sprayed

in the next day or two is tighten and loosen day hopely ill have Pb blaster by then.

 

[coolguy147]

Re: how to use a propane torch?

yay!

i got 7 out of 13 of the bolts out today i was using PB blaster today.

 

[sturdavj]

Re: how to use a propane torch?

So far, So Good

 

[marlboro180]

Re: how to use a propane torch?

yay!

i got 7 out of 13 of the bolts out today i was using PB blaster today.

51 posts and only 7 bolts????

 

[floatingwoody2006]

Re: how to use a propane torch?

Jebebujus!! don't use a can of upside down air on a red hot bolt! Those things are packed with flamables

 

[coolguy147]

Re: how to use a propane torch?

lol i havent used to heat

i don't think i will have too. working the bolts back and forth and the PB blaster seems to be doing a great job.

 

[coolguy147]

Re: how to use a propane torch?

i got another bolt out today got another one on the way possible 2moro


the other 4 arn't even budging ugh.....

 

[sturdavj]

Re: how to use a propane torch?

Kool, Sounds like you?re about ready to YOUTUBE the ?how to's ? of acetylene torch use.

MAPP gas will work as well.

I worked in a shop where they plumbed in mapp gas, there were multiple drops and it was a safer produt to use. The shop/plant covered forty acres under roof and employed about 2,100 workers, we used a heck of alot of mapp gas. The heat range did not appear to be as hot as oxy/acetylene

 

[howlnmad]

Re: how to use a propane torch?

Actually, MAPP is between propane and acetylene as far as heating and cost goes.

 

[coolguy147]

Re: how to use a propane torch?

omg i broke a bolt off today

got another bolt out though and 3 left

when i get all of them out i'm replacing all of them with stainless steel.

 

[j_martin]

Re: how to use a propane torch?

Stainless in aluminum ain't the trick, anti-seize is.