Whining brake pedal
When I turned the ignition to on and put my foot on the brake pedal yesterday it was whining like a little motor was running. We drove around for a few miles. I noticed the brakes got spongier but no...
Forum Discussion
77rollalong wrote:
the winning noise could be the backup pump for the hydro boost, may be an idea to check all the brake lines for any signs of leaks if the master cyl is dropping in fluid level that quickly. They will drop over time as the disk brake pads wear, but not in a few days it should not..
I'm sure it's the hydro boost, ours works the same. Anytime you press the brake with the engine not running and providing vacuum to the master cylinder it will run. It's a safety thing. If the engine quits while your moving you'll need some help stopping that rig. Disk brake take a lot of pressure to work. Something you probably can't do without assistance.
Don't worry about the rubber bulbs popping out as long as the fluid level isn't dropping. Every time you press on the brakes the fluid level will drop some, sucking the bulbs down. Release the brakes and the fluid level goes back up but may not push the bulbs up.
