Showing posts with label brake proportioning valve. Show all posts
Showing posts with label brake proportioning valve. Show all posts

VW Golf MKII Brake Proportioning Valve fix OR rebuild OR replace OR o-ring OR repair OR diagram OR half-cut OR.......
Thursday, May 13, 2010


Did you type the title of this post into Google only to find no instructions for rebuilding your leaking VW brake proportioning valve? I did! Well, rest assured, you don't have to spend $140+ for a new one. You can just clean it out and put new o-rings in it. Mine was leaking in the middle, where there is an o-ring band around it. I assumed that this is where the whole thing screwed apart, but I found that the o-ring actually just covered a tiny tiny hole. It screws apart from the top and you just yank that brass plunger piece out with some needle-nose pliers. The top of the brass plunger has what looks like a screw driver slot, but trust me, turning it with a screw driver does nothing. Pull it out, clean it up, get new o-rings, put it back together, fixed. My o-rings looked fine at first glance, but after further investigation I saw tiny striations that were letting the brake fluid by.


P.S. If you find yourself replacing a starter on a 3rd generation Jetta (or probably others), support the engine with a jack or some stands... those clever Germans thought it was a hoot to use the bolts from the starter to also hold the engine to the engine mount.

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