Brake pedal release/return question
Thread Starter
Intermediate
Joined: Nov 2007
Posts: 35
Likes: 0
From: Fairhaven Ma
Brake pedal release/return question
Brakes are great now, but is there a stop when the brake pedal returns , sometimes it uses out the stop light switch, if i pull on it , the pedal will come back another inch or so. Hate to mess with it, because brakes are so good now.
Pro
Joined: Feb 2012
Posts: 577
Likes: 6
Some years had a brake pedal return spring mounted to the shaft above the brake pedal. You can check your AIM to see if you are supposed to have one and then you can stick your head under the dash and see if the spring is still intact or broken or even present. The weak return might also indicate a weak master cylinder plunger spring.
Team Owner
Joined: Mar 2002
Posts: 24,160
Likes: 78
You installed the wrong booster. There are 2 versions of the booster, one with a short pedal pushrod and another with a long one. All C3s use the long version.
There's a slight *pop* when you lift the pedal up the rest of the way, right? That's the pushrod coming out of its seat in the booster.
There's a slight *pop* when you lift the pedal up the rest of the way, right? That's the pushrod coming out of its seat in the booster.
Instructor
Joined: Jan 2012
Posts: 201
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From: some hole in the ground town- camp verde:) arizona
i have the same problem, and had spent $200 for a period correct booster. i ended up duct taping 4 pennies to the pedal, so when it comes back the pennies push against the sensor and my lights go off. just more redneck injenuity on my Non-Correctly Restored Stingray
Team Owner
Joined: Mar 2002
Posts: 24,160
Likes: 78
To be clear, every vacuum brake booster has TWO pushrods. One on either side of the bladder. One of them presses the MC piston. This one can either be long or short to accommodate a deep or shallow well MC piston respectively. The other pushrod attaches to brake pedal arm. ALL C3'S USE THE LONG PEDAL PUSHROD version of the booster.
Thread Starter
Intermediate
Joined: Nov 2007
Posts: 35
Likes: 0
From: Fairhaven Ma
Ok, changed the booster, now pedal is correct and tail light switch is perfect, has to change MC to a new one with "shallow hole piston" or piston rod recess hole (another 70 bucks) 2 more hours to bench bleed, rebleed entire brake system, rebleed ---rebleed--rebleed (i shower in brake fluid now), brakes are great again. Came to conclusion, 1 0r 2 bubbles the size of Tic/Tacks, screws up the entire system. Corvette brakes are made of evil.
