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VERY loud moaning & groaning after a complete stop

 
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Old 11 Jul 2014, 08:49 am
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Join Date: Aug 2011
Location: Indiana
Posts: 26
Default VERY loud moaning & groaning after a complete stop

We're having a tough time with this, because the problem seems to disappear whenever we drop the PT off at the local shop. I think there is something wrong with the front brakes; here are my symptoms:

• VERY loud moaning, or groaning, metal-on-metal rubbing when coming out of a stop; sound is coming from the front of the vehicle

• Step or tap on the brakes, the sound stops immediately, then resumes when brakes are released again

• Stand on the brakes a while, as at a prolonged stop, and it’s more likely to happen; the longer you stand on the brakes, the more likely the moaning/groaning is to occur

• Eventually, the noise will stop, but can start up again next time brakes are applied.

The Cruiser is a low-mileage 2000 (I want to guess 70K [it's not my car]), and this has never happened before. I've read that these brakes can get a build-up of crud that needs to be washed out, but the mechanics have never heard of such a thing.

Clearly, I'm not a mechanic, but it seems to me as if the brakes aren't releasing properly—like someone pressing both pedals at the same time.
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Old 11 Jul 2014, 09:25 am
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Default Re: VERY loud moaning & groaning after a complete stop

Sounds like what you have said; brakes not releasing and if it's metal to metal your hearing, they should be pulled apart and inspected. Take a good look at the anti-rattle clips also. The only "crud" that I know of that builds up is with the drum brakes in the rear and it's usually a squealing noise.

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Old 11 Jul 2014, 09:31 am
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Join Date: Jan 2011
Location: Queens, NYC
Posts: 351
Default Re: VERY loud moaning & groaning after a complete stop

Definitely check the brake pads and rotors.

However, it sounds more likely to be the front wheel bearings from the noise you described.

Here's a link for front wheel bearing replacement. The symptoms sound similar.



Good Luck
Danny
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Old 11 Jul 2014, 11:16 am
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Join Date: Aug 2011
Location: Indiana
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Default Re: VERY loud moaning & groaning after a complete stop

I love those videos; when I watch them, I think, "I can do that!" But it would take a stick of dynamite to move me to tear the wheel off one of my cars by myself. I shoulda had one of those dads who would bring me into the garage to work on the family car by his side.

Anyway, the front brakes were locked. The mechanics discovered it when they went to replace the pads. We were basically driving around with the brakes on. We're off to pick it up right now.

I'm still curious as to why this happened. I'm more than a little surprised the mechanics didn't guess as much earlier, though we were less accurate in describing the symptoms last time we dropped it off (we thought it was happening in turns, not realizing it was happening after using the brakes).

Thanks for all the input—you guys are the best car community in the world!

Last edited by KroozinNb00zin; 12 Jul 2014 at 09:34 am.
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Old 11 Jul 2014, 11:33 am
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Location: Central Florida
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Default Re: VERY loud moaning & groaning after a complete stop

I'm guessing the piston got stuck, so they replaced the caliper.
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Last edited by LionPT; 11 Jul 2014 at 11:38 am.
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Old 11 Jul 2014, 12:18 pm
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Default Re: VERY loud moaning & groaning after a complete stop

Quote:
Originally Posted by Lion7718 View Post
I'm guessing the piston got stuck, so they replaced the caliper.
Agreed - and a sticking piston is pretty much random.
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Old 12 Jul 2014, 09:40 am
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Join Date: Nov 2013
Posts: 47
Default Re: VERY loud moaning & groaning after a complete stop

Quote:
Originally Posted by KroozinNb00zin View Post
I love those videos; when I watch them, I think, "I can do that!" But it would take a stick of dynamite to move me to tear the wheel off one of my cars by myself. I shoulda had one of those dads who would bring me into the garage to work on the family car by his side.

Anyway, the front brakes were locked. The mechanics discovered it when they went to replace the pads. We were basically driving around with the brakes on. We're off to pick it up right now.

I'm still curious as to why this happened. I'm more than a little surprised the mechanics didn't guess as much earlier, though we were less accurate in describing the symptoms last time we dropped it off (we thought it was happening in turns, not realizing it was happening after using the brakes).

Thanks for all the input—you guys are the best car community in the world!
It can also be caused by a bad brake line. The flexible line can break down inside preventing the caliper from releasing. This is made worse at time when bad garage monkeys bend them too much when removing the caliper, or worse, pinching them with vise grips when removing the line from the caliper to prevent fluid from leaking out. I have seem many "mechanics" do this.

Simple age can make this happen of course, and they will look fine on the outside. They are simple and cheap to replace.
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