Proportioning Valve Replacement

[weber45ca]

Hello

My 2001 GP GT is leaking brake fluid from the proportioning valve close to the right rear caliper. All the brake lines look OK and when I cleaned up the valve I could see fluid stating to come out in the middle of it. I looks like a hairline crack.
It doesn't look to hard to replace.

Can anyone give some directions?

Thanks

Weber

[richtazz]

As long as the lines aren't rusted, it's a matter of just unscrewing the old part and screwing the new one back in, then bleeding the brakes. Nothing technical about that job at all.

[weber45ca]

Hello,

I've tried on the weekend. The nut closer to the wheel came out really easy.
On the second one I wasn't so lucky. I've tried and tried and I couldn't loose it.
I'm afraid of stripping the nut. I've used WD40 and the proper flare wrench.

Any suggestions?

Thanks

Ed

[rkvons]

I'm not sure where this is on your car, but in the past I've had luck taking a propane torch to them. You want to heat up the valve and not the nut, if possible. You have to make sure there is nothing that can catch on fire and have some water handy. I had a difficult time getting a nut out once. I brought the old torch out and fired it up. I adjusted the flame and then I went and put it right on the valve for about 5 seconds. Then I went for the wrench and tried loosening it. It actually squeaked real loud as it was coming out. Leave the side you have already loosened on and concentrate on the other side. If you wind up rounding the edges of the nut over, go to a vise-grip. As a last resort, check to see how far you have to go up the line to the next fitting. If, for some reason, you really mess up the fitting you're working on, you can go upstream and disconnect the whole line and replace it with pre-formed lines of the correct size. In this case, you can cut the line and use a socket to get the old one off. Get the new line longer than needed and make a bunch of 's'-turns in it to shorten it up.

[rickisrad]

I do not suggest heat on the braking system, although I have done it in certain circumstances. You would be better off replacing the line. If you do decide to heat, make sure you bleed out the system well.