MK5 Golf GTI

All Things Mk5 => Mk5 General Area => Topic started by: J30SBO on June 28, 2021, 10:22:55 am

Title: Brake servo vacuum pipe
Post by: J30SBO on June 28, 2021, 10:22:55 am

Noticed the other day, if I go from full boost onto the brakes I get little assistance initially! Checked the vac line off of the pump to the servo and sure as anything both ends cracked, the vac pump end I could actually pull the rigid pipe off of its connector! So for a temp fix I’ve used some pretty tough tape and ties to seal the pipes and now I have assistance as soon as I come off the throttle in boost and the pedal overall feels more responsive! I have always had a very slight hiss from the pedal area and assumed I have a small leak on the servo, but now I’m thinking the lines are letting air being pulled into the servo under vacuum thus causing a slight audible hiss?

Title: Re: Brake servo vacuum pipe
Post by: G-olf on June 28, 2021, 06:19:28 pm

Hi,

Had to do mine a couple of weeks back, a loud screeching noise followed by hanging idle and various fault codes.
It was the second part that had gone after the pass through joint under the vac pump. I bought a new one from aks and the little green blanking plug.

Title: Re: Brake servo vacuum pipe
Post by: J30SBO on July 03, 2021, 11:33:04 am

Update..

Changed all the vacuum pipes from the pump to the servo/inlet. The brakes feel so much firmer/stronger and now inspire confidence! the inlet pipes must have been leaking a fair bit as it feels so much sharper and harder on boost! So much smoother when normally driving in traffic etc! If you haven’t ever checked yours I’d definitely have a look!