Hissing noise from brakes

J

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New Member

Posts

3

• Jun 30, 2007

• #1

Hi

We have a 1995 300tdi, just recently when you apply the brakes there is a loud "hissing" noise which sounds like air escaping from the pedal, also the brakes are now not working very well at all. I have tried bleeding them but to no avail, can anyone shine some light on this please?

Thanks

 

scotty15

New Member

Posts

97

Location

Derbyshire

• Jun 30, 2007

• #2

Hi
It sounds like the servo is got a split in the diaphram.

Scotty

 

J

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New Member

Posts

3

• Jun 30, 2007

• #3

Hi Scotty

thanks for your reply. Whats the easiest way to see if there is a split in the servo please?

 

scotty15

New Member

Posts

97

Location

Derbyshire

• Jun 30, 2007

• #4

remove the vacuum pipe from the engine to the servo and plug the end of the pipe with a bolt and some rag to stop the engine from running rough and the try the brakes.
Scotty

 

J

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New Member

Posts

3

• Jun 30, 2007

• #5

Thanks, I'll give it a try.

 

J

JimAttrill

New Member

Posts

429

Location

Johannesburg, South Africa

• Jun 30, 2007

• #6

Could be a crack in the servo tank itself - look carefully around the bolts where the master cylinder bolts to the servo.

Also put your foot on the brake when starting the engine. The pedal should go down towards the floor.

 

scotty15

New Member

Posts

97

Location

Derbyshire

• Jul 4, 2007

• #7

Have you had any luck with the brake problem.

Scotty