HI THERE IVE JUST BOUGHT A SECOND HAND PEUGEOT 206 AND TODAY IVE NOTICED THAT IT HAS STARTED TO MAKE A HISSING NOISE COMING FROM FRONT PASSENGER SIDE WHEN I RELEASE THE BRAKE. AS OF YET IT IS NOT AFFECTING THE PERFORMANCE BUT IT IS WORRYING AND ANNOYING ME.... I WOULD BE VERY GRATEFULL FOR ANY IDEAS AS TO WHAT IT IS? AND HOW EASY IT IS TO FIX? .......
CAR MAKING A HISSING NOISE WHEN BRAKING
- Thread starter dixon1983
- Start date
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You can soon tell which of the above two it is. Press and release your brake a few times (with the engine running) whilst stationary. Does it still hiss? IF so, it's likely to be a servo problem. The OP says it happens when the pedal is "RELEASED" though. That could be normal - just some sound deadening missing or something. Try the following.
Switch the engine off. Whilst stationary, press and release the footbrake a dozen or so times. The feel of the pedal should change. It will go harder. Then rest your foot gently on the brake pedal and start the engine. As the engine catches, you should feel the pedal get "pulled" down away from your foot a bit. That suggests the servo is working normally. Finally, with the engine running, press the brake. Does the engine falter or the engine note change appreciably?
Switch the engine off. Whilst stationary, press and release the footbrake a dozen or so times. The feel of the pedal should change. It will go harder. Then rest your foot gently on the brake pedal and start the engine. As the engine catches, you should feel the pedal get "pulled" down away from your foot a bit. That suggests the servo is working normally. Finally, with the engine running, press the brake. Does the engine falter or the engine note change appreciably?
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If the engine note does change, what does this mean?
Additionally, I have a peugeot 206 1.1 petrol manual which hisses when the brake pedal is released. Could this be the same thing? The servo? Is it dangerous if not fixed quickly?
1. Get your car serviced.
2. Start your own thread.
Andy
2. Start your own thread.
Andy
All the servo does is take the pressure that you press down on the brake and multiply it.
The idea is so that you don't require as much effort to brake harshly if need be.
The idea is so that you don't require as much effort to brake harshly if need be.
If the hissing comes from the pedal area inside the car, then its the seal between the pedal shaft and the servo internals thats at fault....the change in engine tone / speed is due to air being allowed into the inlet manifold system.
Perhaps the OP will post back?
John
Perhaps the OP will post back?
John
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Avocet has given good advice, some servos are under the bonnet others in the footwell. As it is a french car quite possible the servo is sited in the passenger side that being the "drivers" side for them.
A quick trip into a garage even one of the "quick fit" type and a can you listen to this pretty please? Should reassure you.
Whopps! just seen the post date
A quick trip into a garage even one of the "quick fit" type and a can you listen to this pretty please?
Should reassure you.Whopps! just seen the post date
A change in engine note suggests an air leak. The engine (if it's a petrol engine) naturally generates a partial vacuum in the inlet manifold when the throttle is shut. There should be a thick rubber hose going into the servo from the engine - usually ending in a plastic plug that is pressed into the servo body. That creates a vacuum in the servo which acts on a big rubber diaphragm which "helps" you push the pedal. There could be a split in the hose or the connector seal or the diaphragm itself. It needs checking out. If it fails completely, your brakes will get A LOT harder to press for the same stopping power (which can give you quite a shock).
Good old french cars ay! I had the same problem on a renault scenic it was the brake servo you can pick one up from online scrap yards for about 35 quid its a pretty good service tell them the part number and they all get back to you if they have one in and best price just make sure u get the part number of the broken one
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