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Author Topic: Air-leak (hissing) sound when depressing the brakes pedal  (Read 3299 times)

Offline linus

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Air-leak (hissing) sound when depressing the brakes pedal
« on: September 23, 2011, 10:14:42 PM »
There is a hissing sound when i press hard on the brakes (when engine is on and off).  Is this normal?  I went to TC for servicing today and raised the issue.  The engineer said this is normal... but I did not notice such sounds before.  Anyone can advise?
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Offline jonpaul0104

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Re: Air-leak (hissing) sound when depressing the brakes pedal
« Reply #1 on: October 05, 2011, 07:44:33 AM »
Quote from: linus on September 23, 2011, 10:14:42 PM
There is a hissing sound when i press hard on the brakes (when engine is on and off).  Is this normal?  I went to TC for servicing today and raised the issue.  The engineer said this is normal... but I did not notice such sounds before.  Anyone can advise?

think it is the hydraulic at work.....same hiss hiss hiss sound when u repeatedly pump the brakes....
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Offline jasonkstan

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Re: Air-leak (hissing) sound when depressing the brakes pedal
« Reply #2 on: October 07, 2011, 10:54:49 AM »
It could be the Brake Booster vacuum leaking.  Do you feel need to step harder on the brake to stop the car than before the "hissing" sound started ? :(
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