Whoop Sound When Pressing Brake

Please restrict your questions and replies to Capri related technical issues!
User avatar
pbar
Posts: 5070
Joined: Thu Jun 07, 2012 6:29 pm
Car(s): Capri 2.0 Laser, frequent driver.
Location: North-West

Whoop Sound When Pressing Brake

Postby pbar » Mon Jun 19, 2017 11:07 am

Occasionally, and randomly, I have started to get a whoop/squeak sound from under the bonnet when pressing the brake. Only lasts a second. I am assuming it is to do with the vacuum system on the servo/master cylinder?

Just wondering what the most obvious things are to look at before I delve in. Thanks!

Paul G
Posts: 1167
Joined: Fri Jul 03, 2015 5:21 pm
Car(s): MK 3 3.0S needing restoration, 2.0S, 1.6 Laser (nearly ready), Fiesta mK2 pop plus, Skoda Octavia VRS, Rover SD1 Vitesse.
Location: High Wycombe

Re: Whoop Sound When Pressing Brake

Postby Paul G » Mon Jun 19, 2017 12:02 pm

It's probably in the servo Paul, either the plastic valve that plugs into the rubber grommet from the vacuum pipe or the atmospheric air valve on the rear of the servo where the brake pushrod goes in. Get someone else to press the pedal whilst you have a good listen to see if you can hear which it is.

I've got an old servo and I think both are on it so I could rob the bits and send to you if you can't get them locally.

User avatar
pbar
Posts: 5070
Joined: Thu Jun 07, 2012 6:29 pm
Car(s): Capri 2.0 Laser, frequent driver.
Location: North-West

Re: Whoop Sound When Pressing Brake

Postby pbar » Mon Jun 19, 2017 12:36 pm

Thanks very much Paul, I appreciate that. I will have a closer listen as you suggest and see if I can pinpoint it, cheers!

User avatar
Major_Tom
Posts: 7020
Joined: Mon Jul 28, 2008 8:21 am
Car(s): Hot 2.0S
Location: Cambridge

Re: Whoop Sound When Pressing Brake

Postby Major_Tom » Mon Jun 19, 2017 2:50 pm

pbar wrote:Occasionally, and randomly, I have started to get a whoop/squeak sound from under the bonnet when pressing the brake.


Sorry, that's me. I'll pack it in.
My car isn't stupid.... it's MENTAL.

340truck
Donator
Donator
Posts: 3349
Joined: Mon Jul 28, 2008 8:00 am
Car(s): Rat - GONE
2.8 - GONE
Volvo - GONE
Left with 1.6 fezza as daily to have a bit of fun with.
Hopefully a sierra arrives soon.
Location: Haverhill Suffolk

Re: Whoop Sound When Pressing Brake

Postby 340truck » Wed Jun 21, 2017 5:00 pm

Major_Tom wrote:
pbar wrote:Occasionally, and randomly, I have started to get a whoop/squeak sound from under the bonnet when pressing the brake.


Sorry, that's me. I'll pack it in.


Tom I've told you about this sort of thing before, time to stop now
Image

User avatar
pbar
Posts: 5070
Joined: Thu Jun 07, 2012 6:29 pm
Car(s): Capri 2.0 Laser, frequent driver.
Location: North-West

Re: Whoop Sound When Pressing Brake

Postby pbar » Wed Oct 10, 2018 6:17 am

Just thought I would update this as I found the culprit to be a stuck caliper piston.

User avatar
andyd
Posts: 5059
Joined: Wed Aug 20, 2014 10:43 am
Car(s): 1984 2.8 Injection
Location: Devon

Re: Whoop Sound When Pressing Brake

Postby andyd » Wed Oct 10, 2018 7:13 am

pbar wrote:Just thought I would update this as I found the culprit to be a stuck caliper piston.

Well done Paul :D

Always good to hear what the problems were,what the fixes are and any links to the parts etc.

User avatar
Jasonmarie
Donator
Donator
Posts: 1481
Joined: Thu Aug 13, 2015 12:30 am
Car(s): Ford Capri 2.0 Laser Mercury Grey 1987 hobby
Mercedes Vito Traveline 2.2 Big Bus Daily Driver
Location: Kent

Re: Whoop Sound When Pressing Brake

Postby Jasonmarie » Wed Oct 10, 2018 9:44 am

Glad to here all sorted :cool:
Ford Capri 2.0 Laser 1987 Mercury Grey ....... :beer:

User avatar
pbar
Posts: 5070
Joined: Thu Jun 07, 2012 6:29 pm
Car(s): Capri 2.0 Laser, frequent driver.
Location: North-West

Re: Whoop Sound When Pressing Brake

Postby pbar » Wed Oct 10, 2018 10:54 am

Thank you guys :)

User avatar
Fordoholic Nick
Donator
Donator
Posts: 3828
Joined: Sat Apr 19, 2014 3:40 pm
Car(s): Ford Capri 2.0 Laser,
Ford Fiesta 1.6 TDCi
Location: Enfield, London

Re: Whoop Sound When Pressing Brake

Postby Fordoholic Nick » Wed Oct 10, 2018 5:19 pm

pbar wrote:Thank you guys :)


Great that you found what the problem was Paul and you did not have to 'brake' the bank to get it fixed. Sorry I will 'stop' being silly as you must be getting really 'piston' off witrh my gags :lol: :lol: :lol:
I was born a Fordoholic, They'll bury me a Fordoholic...

User avatar
pbar
Posts: 5070
Joined: Thu Jun 07, 2012 6:29 pm
Car(s): Capri 2.0 Laser, frequent driver.
Location: North-West

Re: Whoop Sound When Pressing Brake

Postby pbar » Thu Oct 11, 2018 6:02 am

Now we know where those joke books of Bob Monkhouse went :)