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05-27-2010, 01:57 PM
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CC Member
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Join Date: Jan 2004
Location: Lewiston,
NY
Cobra Make, Engine: B&B, 1969 392w, Tremec TKO
Posts: 190
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Not Ranked
Screeching master cylinder?
Whenever I jam down hard on the brake pedal, there's a loud screeching sound. It sounds like it's coming from the master cylinder. My car isn't even on the road yet. This happens when I'm just sitting in the garage. I have a lot of pedal and the brakes seem to be functioning properly. Anyone ever hear of a problem like this or have any ideas on how I can figure out what's going on? Thanks...
Mike
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05-27-2010, 03:05 PM
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CC Member
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Join Date: Aug 2007
Location: Carlsbad,
Ca
Cobra Make, Engine: SPF 2932 with 438 Lykins Motorsports engine. Previous owner of FFR 5452.
Posts: 2,616
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Not Ranked
Is there any brake fluid in the reservoir?
Does your cat like to sleep around the brake pedal linkage?
__________________
Jim
Last edited by jhv48; 05-27-2010 at 06:23 PM..
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05-27-2010, 07:46 PM
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CC Member
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Join Date: Jan 2004
Location: Lewiston,
NY
Cobra Make, Engine: B&B, 1969 392w, Tremec TKO
Posts: 190
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Not Ranked
Sometimes I'd like to put the cat under the brake pedal 
To answer your first question, yes... the fluid reservoir is full.
I was reading on some 4x4 forum where a guy had the same screeching master cylinder and he seemed to think that there was still air in the system. Can air in the master cylinder make screeching sounds if you jump on the brakes real hard. If I press the pedal normally there is no screech.
Help!!! Brake experts needed!!! |
05-27-2010, 08:05 PM
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Senior Club Cobra Member
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Join Date: Mar 2001
Location: Southern Connecticut,
CT
Cobra Make, Engine: SPF - 351W, 944 non-turbo
Posts: 2,105
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Not Ranked
Is the noise continuous as long as the brake pedal is being pressed?
Bob
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05-27-2010, 08:16 PM
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CC Member
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Join Date: Jan 2004
Location: Lewiston,
NY
Cobra Make, Engine: B&B, 1969 392w, Tremec TKO
Posts: 190
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Not Ranked
No it isn't, Bob. It's just a short, loud squeak near the bottom of the pedal stroke.
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05-27-2010, 08:43 PM
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CC Member
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Join Date: May 2008
Location: Sacramento,Ca.,
Ca.
Cobra Make, Engine: Midstates (2001)
Posts: 1,724
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Not Ranked
sounds like it still has air in the sytem.....
do your self a favor and by a good brake
bleeder pump.....it will save you time and agravation........
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05-27-2010, 08:43 PM
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CC Member
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Join Date: Aug 2007
Location: Carlsbad,
Ca
Cobra Make, Engine: SPF 2932 with 438 Lykins Motorsports engine. Previous owner of FFR 5452.
Posts: 2,616
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Not Ranked
Quote:
Originally Posted by boris_thespider
No it isn't, Bob. It's just a short, loud squeak near the bottom of the pedal stroke.
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If you're sure it's coming from the master cylinder, the only thing moving is the piston inside the cylinder. It must be scraping against the side of the cylinder walls. If so, time for a new master cylinder.
__________________
Jim
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05-27-2010, 08:50 PM
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CC Member
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Join Date: Jul 2008
Location: Knob Hill, Monterey,
CA
Cobra Make, Engine: 931 mangled in parkinglot incident - traded for new house roof <sob>
Posts: 113
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Not Ranked
Its the tires skidding on the pavment....duh. 
McVette
__________________
"...Just Shut the phuque up and Move on please..."
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