Brake line non return valves

Are there non return valves fitted on the 2 brake lines running to the rear of the car, and if there are do they need to be fitted. Its a 1.8 Gti im enquiring about.

Not sure what model Mk1 you have, but as far as I know the answer is………

On Tin tops there is no non return valve, but there is a regulator valve mounted on the N/S rear axle that both rear brake pipes go through, restricts the braking to suit the rear axle weight.

On my 87 clipper there are no non return valves or regulators for the brake pipes.

Thanks for that. The only reason i was asking was that i have a couple of brake lines lying that i must have stripped out of one of my 2 project Gti s and on them, not far from where they came out of the master cylinder there are what looked like non return valves.
I think i shall have to post a pic on here of them.

Macca said

Thanks for that. The only reason i was asking was that i have a couple of brake lines lying that i must have stripped out of one of my 2 project Gti s and on them, not far from where they came out of the master cylinder there are what looked like non return valves.
I think i shall have to post a pic on here of them.

AHhh!!! Now I know what you are referring to, they are not non return valves, but are just 'T' pieces to allow the pressure switch for the brake lights to be connected into the circuit  :wink:

No there not tee pieces either. Ive taken a picture however I havent uploaded it yet.
Another question for the technical minded. Does it matter what feed from the master cylinder goes to which connection on the rear brake pressure regulator?

Here are the bits that I thought were non return valves

on one i broke it had them and a compensator on the axle , had hoped they were restrictors and i might not need a compensator, some master cylinders have additional "things" screwed into them too which are a mystery to me aswell , on reading some about it i believe there are a few different ways the brakes were piped

Those items are one way valves, they contain a spring with a ball bearing on the end, apparently need removing when fitting rear discs.

So as my car doesnt have the rear disc conversion I take it I will have to fit these to my new brake lines?

As vw fitted them originally i would think so.

Having thought more re this, i dont think they could be non return valves as surely that would cause the pressure at the rear brakes to stay high once the pedal had been pressed, causing them to lock on. Could they be pressure reducing valves reducing the pressure to the rear?

am lead to believe you can do away with the compensator by using restrictors , would love to find out more about that cos comensators are most of £100

im sure there non return valves mate as my mate put them on the wrong way and we couldnt get brake fluid to the rear brakes until we turned them aronud

foxy

Thanks for all the replies! Its now decision time, to fit or not to fit?
I might just fit them as i dont want to start having to cut them in later and get brake fluid over my newly painted bay.  

i had a few questions up around the time i did the brake lines n had very little help , otherwise i'd pass it on

Macca said

Having thought more re this, i dont think they could be non return valves as surely that would cause the pressure at the rear brakes to stay high once the pedal had been pressed, causing them to lock on. Could they be pressure reducing valves reducing the pressure to the rear?

  They are not pressure reducing valves, thats what the compensator does,  they are one way/non return valves, Agree you would think they would cause the rear brakes to stay on, but they obviously dont.

am lead to believe you can do away with the compensator by using restrictors , would love to find out more about that cos comensators are most of £100

Bugger just sold one for £10 LOL

No problem. All help i   s appreciated.  

i would also love t know exactly what those things are and thier role in the braking

Now i can do with finding some pics of the brake pipe runs in the engine bay.