brakes
Thread Starter
Intermediate
Joined: May 2003
Posts: 41
Likes: 0
From: gurnee Illinois
brakes
I have just put a new set of front rotors and pads on my 99 vette. All I did was collapse both pistons, I did not disconnect the lines at all. It now appears that the brakes are real spongy and have a hard time stopping the car. Is it possible that air somehow got into the lines and now I have to bleed the brakes? Did this ever happen to anyone?
THANKS NICK
THANKS NICK
Safety Car
Joined: Dec 2002
Posts: 4,010
Likes: 1
From: SE Idaho
St. Jude Contributor
Re: brakes (Nixs99)
I guess anythinng is possible, but whenever I have replaced just pads, I remove the master cylinder top, and squeeze the pistons back in with a C-clamp (using one of the old pads between the clamp and piston to prevent any damage to the pistons). Did you pump the brakes approx. 20 times after you installed everything, to set the pads, and before driving?
Also, GM does recommends burnishing pads.
Burnishing the brake pads and brake rotors is necessary in order to ensure that the braking surfaces are properly prepared after service has been performed on the disc brake system.
This procedure should be performed whenever the disc brake rotors have been refinished or replaced, and/or whenever the disc brake pads have been replaced.
Select a smooth road with little or no traffic.
Accelerate the vehicle to 48 km/h (30 mph).
Important
Use care to avoid overheating the brakes while performing this step.
Using moderate to firm pressure, apply the brakes to bring the vehicle to a stop. Do not allow the brakes to lock.
Repeat steps 2 and 3 until approximately 20 stops have been completed. Allow sufficient cooling periods between stops in order to properly burnish the brake pads and rotors.
Also, GM does recommends burnishing pads.
Burnishing the brake pads and brake rotors is necessary in order to ensure that the braking surfaces are properly prepared after service has been performed on the disc brake system.
This procedure should be performed whenever the disc brake rotors have been refinished or replaced, and/or whenever the disc brake pads have been replaced.
Select a smooth road with little or no traffic.
Accelerate the vehicle to 48 km/h (30 mph).
Important
Use care to avoid overheating the brakes while performing this step.
Using moderate to firm pressure, apply the brakes to bring the vehicle to a stop. Do not allow the brakes to lock.
Repeat steps 2 and 3 until approximately 20 stops have been completed. Allow sufficient cooling periods between stops in order to properly burnish the brake pads and rotors.
Le Mans Master
Joined: Dec 2000
Posts: 9,899
Likes: 1,839
From: Hot Springs AR
Re: brakes (Nixs99)
Nick,
It could be just that you've introduced old heated water-saturated fluid back into the brake lines where any compressibility will be magnified most. I'd do a good brake bleed on all 4 corners and see if your pedal comes back.
In any case, check out Baer Brake System's website ( http://www.baer.com ) for a good description on how to embed your pads and rotors properly.
HTH, and have a good one,
Mike
It could be just that you've introduced old heated water-saturated fluid back into the brake lines where any compressibility will be magnified most. I'd do a good brake bleed on all 4 corners and see if your pedal comes back.
In any case, check out Baer Brake System's website ( http://www.baer.com ) for a good description on how to embed your pads and rotors properly.
HTH, and have a good one,
Mike
