Good evening all, hope we are all keeping well!

I have a quick question. Does anyone else get a hissing noise from the master cylinder area whilst they bleed the brakes on their RST's?

I noticed it when I did my front and rear brake conversions but thought nothing of it. Is this a problem or something that naturally happens?

Cheers in advance,

Lee

 

If you are getting it all the time(engine off) it would rule out the vacuum being released which normally causes this, or you just have good hearing!!
tabetha

 

Well, it doesn't happen when the engine runs, just when it's off and bleeding the brakes. It's quite loud too.

 

Anyone???

 

Tried bleeding mine today and found the servo hissing. Still haven't managed to get a pedal but I'm glad I can rule this out as the cause. Must just need to pump a hell of a lot more fluid through the system.

Dan

 

mine hissed then fluid started to run down the servo