Brake pedal went to the floor, the brake reservoir's rubber bladder seal had been completely sucked into the reservoir itself?

1993 CHEVROLET SILVERADO
150,000 MILES • 5.6L • 6 CYL • 2WD • AUTOMATIC
Avatar
SID HENRY
  • MEMBER
  • 1 POST
I put my truck into drive and as it began to engage, I pressed the brakes to stop. The brake pedal sank all the way to the floor and would not return to its original position, so I forcefully pulled it back up hoping that it would engage on the second attempt to press it. Still not engaging I began to panic because I couldn't stop and was dangerously close to other people's cars and someone's house. I threw the transmission down to low 1 in order to control my speed and allowed my truck to continue driving. I rode around the block and found a field with space enough to feel safe and entered into it, all the while still tapping my brakes to see if they would respond. I finally decided to force the transmission into park which I had to do by catching a moment where it changed directions from going into reverse and had to be momentarily motionless. I checked my reservoir first and found that the rubber bladder seal had been completely sucked into the reservoir itself and had even been stretched too far out of shape to simply put back on the lid, it also had ripped slightly. Now I'm stuck after hours needing to get to work, which is 1 hour out of town and there is no one to even call and ask for a ride home. But I have access to another reservoir, only this one is simply a twist cap. So why the difference and can it be swapped without doing a whole brake system swap?
Jul 16, 2023 at 2:29 PM
Advertisement
Avatar
JACOBANDNICKOLAS
  • Experienced Mechanic
  • 110,240 POSTS
Hi,

Was the brake fluid reservoir empty? I know it can draw the seal into the reservoir if there is no fluid.

Also, I can't answer if the two reservoirs are interchangeable. I have a feeling they aren't.

If possible, take a few pics of your reservoir and the one you got with a screw top lid and upload them so I can see them.

Take care,

Joe
Jul 16, 2023 at 2:59 PM
Join 2CarPros for free, one of the most advanced car repair communities on the internet. From first-time drivers to seasoned mechanics, everyone is welcome to reply, share details, and get better answers. You can add a temporary image or video first; uploads are limited to 20 MB.
Ask a Free Question
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.