Ok to use heat on brake valves? (Page 1/1)
gregr75 JUN 03, 12:47 PM
I am in the middle of redoing all my brake lines with TFS stainless kit. The old nut fittings are coming apart nicely with a torch followed by a shock of pb blaster. But im not sure if its ok to use heat on the 3 way valve in back and the proportioning valve up front? or whatever you call it. i know the master cylinder you cant because there are o rings etc. i dont know if these valves have o rings too.
pmbrunelle JUN 03, 12:54 PM
The tee in the rear is just a block of metal, so you can use heat.

The combination valve up front has rubber. Probably you should strip off the plastic/rubber components before applying heat to it.

See Ogre's Cave for a section view of the combination valve.
gregr75 JUN 03, 01:01 PM
Thank you sir! I am was literally in my garage wondering what to do
theogre JUN 03, 04:15 PM
⚠️ Warning: Do Not heat the combi valve.

That has plastic and rubber In It.

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Dr. Ian Malcolm: Yeah, but your scientists were so preoccupied with whether or not they could, they didn't stop to think if they should.
(Jurassic Park)

The Ogre's Fiero Cave

jelly2m8 JUN 05, 02:47 PM
When replacing old brake tubing, just cut the tubing off flush with the flare nut, use a 6 point socket and a ratchet, support the Tee and / or the valve with a wrench of proper size or an adjustable wrench and it will all come apart fairly easily.
Dennis LaGrua JUN 05, 06:32 PM
Good tips here but I'd like to add another. To remove the flare nut fitting I spray with PB Blaster and let it sit. If it wont come off with a flare nut wrench I'll grab onto it with a small adjustable Stilson wrench (adjustable pipe wrench). It may distort the flare nut just a bit but the fitting usually comes off and can be re-used and re-tightened but if the line breaks then Jelly2m8's technique may be the only option.

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