Whenever I let off the brakes they hiss for about 15 seconds and it gradually fades. It doesn't matter if I'm doing 60 and I tap the breaks or if I'm taking off from a dead stop, they hiss. If I barely press the brake pedal it stops, but will resume as soon as I let my foot off again. It's really loud and just started this morning. What could it be?
(It's a 2003 Navigator if that makes a difference)
Thanks for all your help!!
2007-10-09 15:28:50 · 7 answers · asked by hotmom_e 2 in Cars & Transportation ➔ Maintenance & Repairs
It makes this noise even after the car is turned off and I take my foot off of the break. It sounds like it is coming from the break mechanism inside the car. The rotors and pads look perfect.
2007-10-09 15:47:49 · update #1
Sounds like a leak in your vacuum booster.
2007-10-09 15:36:48 · answer #1 · answered by Anonymous · 0⤊ 0⤋
first difficulty is to locate precisely the place the hissing is coming from. Get somebody to take a seat down interior the motor vehicle with the engine working, the gearbox in impartial, the bonnet up and the handbrake on. The handbrake is cable operated so won't impact this try yet will quit the motor vehicle working away! The get the guy interior the motor vehicle to press and launch the brake pedal persistently while you hear and detect the hissing. that's maximum in all threat coming from below the bonnet close to the back of the engine bay. there's a gadget there which feels like a vertical flying saucer with pipes coming from the incredible the place there's a plastic fluid reservior. that's the brake servo help (facilitates you once you push the brake pedal). This works via the engine sucking the air from the brake servo via a pipe. it ought to be that the pipe has a leak in it or there's a leak interior the servo unit. the two way that's a substantial risk-free practices merchandise. Get your vehicle to a storage or somebody like formula one million autocentres and get somebody to envision it out. you're combating ok yet in an emergency.....? With young little ones in touch, that's only no longer rather well worth the possibility.
2016-12-14 12:47:16 · answer #2 · answered by ? 4 · 0⤊ 0⤋
that noise could very well be the wear indicators telling you the brakes are wearing out and need to be inspected or replaced. If that is the case, I would have them checked out asap because if they wear too much, they can start to damage the brake rotors or discs... which adds a couple of hundred dollars, at least, to the tab...especially a Navigator, they go through brakes fast and if that is whats happening, you should have it checked out... Actually, either way, why mess around with brakes???? they are one of the biggest safety factors (if not THE biggest) in any vehicle - Have it checked out by a professional at a dealer Girl!!
2007-10-09 15:40:33 · answer #3 · answered by mr supra 1 · 0⤊ 0⤋
The only possible thing I can think of is the brake booster. It is mounted on the master cylinder, under the hood, directly in front of where you sit in the drivers seat. Get someone to look and listen while the engine idles and you operate the brake.
2007-10-09 15:56:55 · answer #4 · answered by tronary 7 · 0⤊ 0⤋
You should have them looked at if everything is in working order and the pads and rotors are in good condition it may be something else
2007-10-09 15:37:16 · answer #5 · answered by Anonymous · 0⤊ 0⤋
uneven worn brake pads.....warped rotor...bad caliper these are just a few of the things that could be wrong...tell a mechanic about what you hear and he/she should be able to fix it no problem
2007-10-09 15:36:33 · answer #6 · answered by jay h 2 · 0⤊ 0⤋
you dont stop as fast as you normally would. and it will ruin your tires
2007-10-09 15:37:18 · answer #7 · answered by ME`L!SSA 3 · 0⤊ 1⤋