Very slow brake fluid leak

Sweet, that’s why I rarely bite at the perception of anger or frustration on the forums. No problem from me brother.

I do appreciate the pointer. I had the hose off but it simply didn’t occur to me to remove the valve and poke inside. I had already made up my mind.

I kind of don’t mind the scatter gun approach. Gets my gears turning.

Fingers crossed on the fix. Not going to enjoy working in the 100 degree TX heat...

 

I certainly don't miss that Texas heat humidity...lived there for 9 years

 

Yeah wrenching and tools are fun for me.

It amazes me that a lot people have no real interest in learning anything new. Or just anything...

 

I can't fathom how people have no curiousity for how things work. Or no desire to learn new things.

 

Well, I took a syringe and an old NG tube (medical device for feeding babies by going up the nose and into stomach) and sucked 7oz of fluid from the booster. It's pretty thin and very bendy so i believe I got 99% of it. I'll do it again while replacing MC this weekend...

Fluid was black.Do y'all think the booster will be ok or will it need to be replaced? I'm leaning replaced....eventually.

 

My money is on 'ok'.

In over 50 vehicles with various pile of miles, abuse and neglect I only have had one booster failure. On a mid 60's GM product.

It's not that they don't fail of course. It's just that its very uncommon. And I'm sure many are rolling around with brake fluid in them.

 

If you want to be super nice you could pour some soapy water in there, shake the truck around, and siphon it out, but if you got most of it I'll second the vote 'ok'.

 

I'm having visions of oil spill animals being washed with Dawn...

 

Procedure was successful. Bench bleeding is extremely messy. I’d advise draping a rag over your fingers. I didn’t and got fluid all over my arms and bench.

Brakes feel good though.

 

In 25 years of professional mechanic-ing I've never bench bled a master, and never had a problem. IMO it's an un-necessary procedure- and yes. Messy as fuck. Glad you got it sorted though.

 

Yeah didn’t seem so necessary after the fact. Seeing that I bled the brakes anyway.

 

Did the new one not come with plastic nipples to screw into the line port, then run a small hose from the nipple back into the master?

That technique creates minimal mess, if any.

Bench bleeding is worthwhile IMO. Especially if you are not going to bleed the whole system. For example, you've already got fresh (and expensive) fluid in everything, and the master was a new problem. Gets the air out so you don't have to bleed it all. And even if you are going to bleed it all, it's just that much air that doesn't have to work it's way to the far corner where you start.

Anyway, glad you got it all worked out.

 

No plastic nipples. It was a Toyota MC. Just plugs in the outlets. I sort of agree with the bench bleeding, and limiting the air in the system. I did bleed the brakes but the amount of fluid needed was way less due to what little air got in there. All the work was done up high so not much. I did want to bleed the lines as I got a new reservoir and didn't want to introduce dirty fluid from the rest of they system.

What you describe would have been super handy however...

 

Something like this, for others who might be interested