hiss of air on brake release

chrisneill · Nov 4th, 2009, 09:15

I piggybacked onto someone else's thread about noises when braking, but I am not convinced that the symptoms being responded to were the same as mine. Predominantly when cold, when I brake and then take my foot off the pedal, there is a hiss. As I say, on a good run this will go away, but is evident when cold. The response given was expensive. the braking capability is not reduced when this is happening. Any thoughts?

thanks

kdst5 · Nov 4th, 2009, 13:57

Mine was the same it only happend when you took your foot off the pedal, but it was still the brake servo and yes it is expensive.

You can live with it for a while but if it gets to bad then the braking assistant will reduce and can stall at ideal.

kdst5 · Nov 4th, 2009, 14:02

Forgot to add thet the cause of the servo going was the master cylinder leaking, another £150 on top of the £350 for the servo and 3 - 3.5 hours labour.

Razer · Nov 4th, 2009, 15:16

I had the master cylinder on my S60 replaced yesterday at a volvo garage, cost on my bill says £124.50 (parts only + £87.50 labour + brake fluid £8.90) (also had to have the clutch position sensor changed as fluid had leaked on to it!)

southportvolvo · Nov 4th, 2009, 15:28

Does sound like a brake servo going by previous experience

Nov 4th, 2009, 09:15	#1
chrisneill Junior Member Last Online: Oct 9th, 2015 11:24 Join Date: Jul 2009 Location: camberley	hiss of air on brake release I piggybacked onto someone else's thread about noises when braking, but I am not convinced that the symptoms being responded to were the same as mine. Predominantly when cold, when I brake and then take my foot off the pedal, there is a hiss. As I say, on a good run this will go away, but is evident when cold. The response given was expensive. the braking capability is not reduced when this is happening. Any thoughts? thanks

Nov 4th, 2009, 15:16	#4
Razer Senior Member Last Online: Sep 11th, 2022 17:51 Join Date: Dec 2005 Location: Surrey	I had the master cylinder on my S60 replaced yesterday at a volvo garage, cost on my bill says £124.50 (parts only + £87.50 labour + brake fluid £8.90) (also had to have the clutch position sensor changed as fluid had leaked on to it!) __________________ MY17 - XC90 Momentum, 20" Wheels, Polestar, Winter +, rear tints, Heated rear seats, 12" TFT, 360 Camera & BLIS MY14 - XC60 R-Design Nav Lux (2014-2016) MY07 - V70 D5 SE Lux (2009-2014) MY05 - S60 D5 SE (2006-2009)

Nov 4th, 2009, 15:28	#5
southportvolvo Trader Last Online: Nov 19th, 2021 13:18 Join Date: Jul 2007 Location: Southport/Merseyside	Brake servo Does sound like a brake servo going by previous experience

Nov 4th, 2009, 13:57	#2
kdst5 Senior Member Last Online: Apr 26th, 2024 16:09 Join Date: Jun 2007 Location: Horsham	Mine was the same it only happend when you took your foot off the pedal, but it was still the brake servo and yes it is expensive. You can live with it for a while but if it gets to bad then the braking assistant will reduce and can stall at ideal.

Nov 4th, 2009, 14:02	#3
kdst5 Senior Member Last Online: Apr 26th, 2024 16:09 Join Date: Jun 2007 Location: Horsham	Forgot to add thet the cause of the servo going was the master cylinder leaking, another £150 on top of the £350 for the servo and 3 - 3.5 hours labour.

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