Torching my brake lines

[kyngfish]

Just kidding.

What I mean is, my rubber lines look kind of crap, and was looking to replace them, only I've tried Kroil and flared nut wrenches and short of grabbing vice grips, they don't want to budge from the fittings at the top. (fittings at the bottom came off fine when I did my caliper rebuild recently)

Draco recommended burning tha mothas down. Which sounds good. To everyone that has done this, what type of torch? (prefer relatively affordable, if not, might as well just get the mechanic to do it and buy a torch when I really need one later).

Open to other options as well.

Cheers.

[SiberianDVM]

Needle nosed vice grips FTW. Get them on good and tight and then tap with a hammer if you need to. Have never had to do this on a Porsche, but it's the only thing that would work on the M3.

[strictly]

I once torched a metal brake line, and it blew the flexi hose down the line, small fire but no panic, still lesson leaned, so now if I cant get them apart with a COLD method (cold/freeze release spray and vice/mole grips), I simply cut and replace the whole lot

[DanielDudley]

IRWIN Tools Vise-Grip 4LW Locking Wrench with Wire Cutter | eBay

[1979-930]

You need one of these from Home Depot. I got the one with the 360* swivel to get into different spots without turning the bottle upside down. A big torch is too hot. These are just right. Heat the outer fitting moving top to bottom for a min or so. Usually when the tip of the torch shield starts to glow the part is hot. Wait 30 seconds for the heat to loosen it and it to start cooling. When its hot the swelling holds it frozen. As it starts to cool it releases and comes right apart. I swear I have to use the torch on every third bolt and 100% of the time on steel to aluminum bolts.

And I used it on my brake line fittings. Ordering new lines, so I wasn't worried about damaging them.

[Knockdown]

I just went through this exercise. Sprayed with thread penetrant a couple of days before hand. I cut the old rubber lines close to their fitting and used a deep socket and a battery powered impact wrench (Makita 18V)on the rubber hose fitting. Nice thing with these impact drivers is the torque applied depends on how far you pull the trigger, so you can lightly hammer them for awhile with shorts burst of higher torque. Fortunately, all came off without issues on my 77. Held the hard line with a tubing wrench during this.

[kyngfish]

Thanks for all the feedback y'all. I'll let you know how it goes

[47silver]

i used wax on some stuck bmw strut bolts that worked for me when nothing else worked heat the fitting a bit tand apply the wax,, the wax wont burn like penetrating oil and seems to work for me.