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At brake pedal vacuum leak hiss!

Help, Advice, Owners' Discussion and DIY Tutorials on Volvo's stylish, distinctive P2 platform cars sold as model years 2001-2007 (North American market year designations).

2001 - 2007 V70
2001 - 2004 V70 XC (Cross Country)
2004 - 2007 XC70 (Cross Country)
2001 - 2009 S60
2003 - 2007 S60 R
2004 - 2007 V70 R

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fsk
Posts: 2
Joined: 18 May 2009
Year and Model: 2001 v70 2.4T
Location: ohio

At brake pedal vacuum leak hiss!

Post by fsk »

Do not want to replace brake vacuum boost canister. There is a rubber boot on the shaft of the brake pedal under the dash. It has a few indentations/openings that looks like there is a reed/flap below which seals when the motor produces a vacuum for the brake booster. It is leaking sometimes there where I hear the hiss. Is there an adjustment like rotating the shaft. Does it have threads at the end attached to the booster?
Thanks for any previous experience with this problem or technical knowledge about this boot/reed valve function.

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