THE brake story...continued...HELP!

[Anonymous]

Not available in Australia,

Yes they are. Go to any motoring bookshop.

[Golf Loon]

Great thanks, i`ll check it out. How are the brakes going Brackie?

[imported_brackie]

Stalemate

Nuthn's goin' Mate. Definitely not the car as it might go, but it definitely won't stop! Sent my old seals (from the original 12mm bore MC) to Hobart to get new ones. Gonna fix up the old cylinder and put it back in. If that doesn't fix it it can only be the booster. But I can't even imagine how it can be responsible. Then ...THE CRUSHER!! She's been in my shed for 2 weeks now and I can't get anything else in. Pug needs cooling system flush and coolant, blower fan overhaul, Golf should have had rings and bearings done weeks ago. And we start tearing down walls and building kitchens on Wednesday. You got a booster that would fit??

[Golf Loon]

Aaaaaargh Just cut down the shaft on an Audi Booster so that i can fit it to my golf. Only golf ones here now. Is the seal between the MC and the booster ok? Instant Gasket?

[imported_brackie]

Seal

Yeah, the seal is leaking slightly. It's an"O" ring. but I've had small vac leaks on other cars and the pedal's been OK. Are you saying that this could be the culprit?

[Golf Loon]

Put a thick bead of instant gasket over the o ring seal and try it.

[Volksfolks]

Whats the outcome Brackie, any good!! seems you are having some bad luck here..

[imported_brackie]

Still in bits

Nah... No outcome. I sent the seals from the old MC to ABS in Hobart but they don't have any replacements. I intended to rebuild the old MC and see if the problem was specific to the new MC. Absolutely NOBODY I have spoken to knows why I am having this problem! At the moment I'm doing building things to the house (as well as routine farm work) so it's on the backburner. I'll get back to it next week with a bit of luck. It's a good thing my trusty old diesel is still chugging away!

[20v kit car]

simple just replace the one way valve which comes off the manifold ..better still use a clamp seal it off and start the engine....brakes hard? then check if the valve hasn't been fitted arse about...sounds like the hydraulic part of the brakes are fine...the valve the valve..as it was taken to the crushes cheers steve

[imported_brackie]

Never thought of that!

Didn't know there was one! I'll check it out when I get the MC back together.

[20v kit car]

its a small cicular valve which is in line from manifold to booster...if it's missing ...thats the problem...if there try sucking thru it one way..then blow back it should seal ...sounds like the prob cheers steve

[imported_brackie]

Nope...Not that!

Finally got a few minutes to look at the brakes. Checked the one-way vacuum valve but it's OK (thanks, Steve!). Carefully compared the fit of the primary pistons from both MCs onto the pushrod in the booster. Exactly the same. Can't find anything (spacer maybe??) that may have dropped into the booseter body when I took the MC off. Reassembled the "new" master cylinder so it's ready to go in. Now have to bench-bleed it. Hopefully by the end of the week????

[imported_brackie]

Brakes fine...Until....

Bench bled the MC. Reassembled everything and bled the system. Gasket sealed the "o" ring. Brakes came up high and hard (just like me when I was a young bloke!) Then I started the motor..... To the floor. I'm now convinced it's the booster (you appear to have been right Looney) so I'll have to find another. I can't understand why it should suddenly fail as it was working fine before initial disassembly, but it's the only thing left. So who's got a booster? I reckon it'll be almost impossible to get one here in Tassie. By the way, I drove the car with the booster disconnected and the brakes worked fine except I had to push real hard. No sponginess or fade.

[20v kit car]

are you sure about the valve?????cheers steve

[imported_brackie]

Valve

Absolutely... But I'll re-check anyway!