Is there supposed to be cap on my proportioning valve? Realized I’ve been topping off brake fluid because it oozes out of the end there (circled)

[Gavin_Aspen]

 

[SenorNoob]

That looks more like a full blown ABS valve to me.

I'm gonna say something else is wrong there. (Loose maybe? IDK) A cap isn't gonna stop it from leaking. Nor should it need to.

 

[Curious Hound]

I agree. That's the rear ABS control valve. I'll try to remember to get a picture of mine later.

 

[Curious Hound]

Mine has a rubber cap there and there is nothing coming out. However, it is just a soft rubber dust cap, not meant to hold any pressure. I would expect that a leak at that point means "replace the whole control block."

Before doing that, clean the whole assembly real good with brake cleaner and rags. Then watch it over a week or two to see if there really is a leak.

better view

Front end


Overall view

 

[lil_Blue_Ford]

Yeah, that should be the bleeder for the ABS block that appears to be leaking and yes, originally they had a rubber dust cap, but if it’s leaking, that missing dust cap isn’t the problem.

 

[SenorNoob]

So is that the same as the bleeders on the calipers? If so, it might be replaceable without doing the whole valve. I'd expect things to be pretty nasty inside if it just started leaking like that. What's your brake lines look like inside? About to pop a hole from internal rust?

 

[lil_Blue_Ford]

So is that the same as the bleeders on the calipers? If so, it might be replaceable without doing the whole valve. I'd expect things to be pretty nasty inside if it just started leaking like that.

Yes, it’s a bleeder screw just like on calipers or wheel cylinders. I’ve had them out before and as long as the bleeder screw itself is the problem and not something else, it is replaceable.