Trying to replace a bad brake MC but can't free the proportioning valve. Tried penetrating fluid, torch. Any other ideas? Bought a new MC can't find a new Proportioning valve. All ideas welcome. Herb

 

I've found using the very tip (flat part) of vice-grips on the flat part of a nut can help crack it loose without messing up the hex. You need to be careful to have them tight enough that they don't slip but not so tight the distort the flare nut. Go slow. These flare nuts can be annoying and deform easily, even with a flare nut wrench.

If you end up needing a 79 proportioning valve I have one so shoot me a PM. As I see it you will likely need new lines rather than the proportioning valve though.

 

Ya. I was trying to avoid destroying the lines. I have never made brake lines before. Tool recommendations?

Herb

 

You'll need a tube cutter, double flaring tool and small tube bender for a clean looking job (several different styles avail). Some line wrenches for the connections are helpful as well as a bleeder of some sorts.

 

Your idea about using the tip of a vice grip worked. Didn't even chew up the fitting. Thanks. Now if you could tell me where I stashed some of the parts I took off the car 4 years ago....

Herb