prerunner1982
Very Senior Member
Posts: 2218
Loc: edmond, ok usa
Reg: 10-16-01
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09-24-08 05:29 AM - Post#1528364
Ok... changed the front brakes on my bro-in-laws 04 Classic/Malibu... Now the brake pedal goes all the way to the floor. When changing the pads we didnt release the valves, we used a C-clamp and compressed the piston. Could this have been the problem? I went ahead an tried to bleed the brakes after we realized the problem but it didnt help. Do newer cars not take so kindly to the C-clamp? Some other automotively inclined people I conferred with state they would have done it the same way...
It is full of fluid... so what's the deal? Help! Thanks...
Jon
1982 Chevy Silverado-Retired (need LWB Frame in OKC)
1987 GMC Sierra-RIP Jan 11, 2007
1993 Jeep Cherokee 2 door(4.0ltr, AX15, NP231, Chr 8.25)
2005 Kia Sedona (wifes) |
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 TAT_2
"14th Year" Silver Supporting Member, and Official CT Grim Reaper
Posts: 31485
Loc: "UNDER THE BOARDWALK"
Reg: 10-29-00
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09-24-08 05:38 AM - Post#1528367
In response to prerunner1982
KEEP PUMPING THE BRAKE PEDAL,IT WILL RETURN TO NORMAL 
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JUST LIKE JEFFREY
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prerunner1982
Very Senior Member
Posts: 2218
Loc: edmond, ok usa
Reg: 10-16-01
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09-25-08 07:58 AM - Post#1529120
In response to TAT_2
With the vehicle off the pedal pumps up, as soon as you start the car there is NO pressure and it will drop to the floor..??
Jon
1982 Chevy Silverado-Retired (need LWB Frame in OKC)
1987 GMC Sierra-RIP Jan 11, 2007
1993 Jeep Cherokee 2 door(4.0ltr, AX15, NP231, Chr 8.25)
2005 Kia Sedona (wifes) |
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BrianEsser
BANNED
Posts: 7383
Age: 38
Loc: North Star, Ohio
Reg: 06-30-01
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09-25-08 08:27 AM - Post#1529134
In response to prerunner1982
This is the problem with using a C-clamp. You are NOT supposed to use a C-clamp to press the pistons back in most modern ABS systems and can actually cause more parts failure. Like Tat said. Pump the snot out of the brakes. If the pedal doesn't come back up on it's own. Try bleeding the system as air may have been introduced. If that doesn't work you may have caused damage in the ABS hydraulic unit.
C-clamps are a no-no. Always use a rubber line clamp, clamp off the line, crack the bleeder and press the piston back. If you close the bleeder before the piston bottoms out, you won't even need to bleed the system.
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