 OT: What could cause brakes to squeal when you're NOT using them? |
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| dbgriffith75 |
 Apr 21 2009, 04:34 PM
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#1
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TheGrif  Group: Members Posts: 509 Joined: 25-July 07 From: Iowa, USA Member No.: 7,945 Region Association: Upper MidWest  |
It's happening on a friends car. I know if you're using them, the squeal is from the indicator tab rubbing on the rotor, but I've never heard of them squealing when you're not using the brakes.
It's a Mitsubishi Galant- 2003 but I'm not sure on the year. Thanks in advance! |
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| detoxcowboy |
Apr 21 2009, 04:41 PM
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Senior Member Group: Members Posts: 1,294 Joined: 30-January 08 Member No.: 8,642 Region Association: Africa |
QUOTE(dbgriffith75 @ Apr 21 2009, 03:34 PM)  It's happening on a friends car. I know if you're using them, the squeal is from the indicator tab rubbing on the rotor, but I've never heard of them squealing when you're not using the brakes. It's a Mitsubishi Galant- 2003 but I'm not sure on the year. Thanks in advance! when i first got my proter fields they squelled a bit when backing up.. this lasted for a week or so.. could be your bearings?? |
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| RJMII |
Apr 21 2009, 05:06 PM
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Jim McIntosh Group: Members Posts: 3,125 Joined: 11-September 07 From: Sandy, Utah Member No.: 8,112 Region Association: None |
A brake squealer. =o) your pads are about shot. They put this metal tab on at a wear line to intentionally annoy the hell out of you to get you to take it to a mechanic. (or to alert someone 'in the know' that the brakes need replaced)
edit I should have read the WHOLE post first. lol: The indicator tab that you mention is staying too close to the rotor when he/she lets off of the brake; the fluid doesn't go back up into the reservoir or master cylinder... |
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| SirAndy |
Apr 21 2009, 05:43 PM
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#4
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Resident German Group: Admin Posts: 41,679 Joined: 21-January 03 From: Oakland, Kalifornia Member No.: 179 Region Association: Northern California |
Sticky pistons ...
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| ConeDodger |
Apr 21 2009, 05:44 PM
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Apex killer! Group: Members Posts: 23,614 Joined: 31-December 04 From: Tahoe Area Member No.: 3,380 Region Association: Northern California 
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When brake pads vibrate at very high rate they squeal. One thing that some mechanics do is to spray the back of the pad with an anti-squeal like gel that prevents this. It is possible that your friend is missing a shim in his brakes called an anti-squeal shim as well. I had a number of Datsun Z cars over the years that squealed as you drove particularly at slow speeds and found that the small metal anti-squeal shim was gone.
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| type2man |
Apr 21 2009, 06:16 PM
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Member Group: Members Posts: 353 Joined: 3-March 09 From: Miami, Fl Member No.: 10,127 Region Association: South East States |
If your brakes are indeed down to the wear indicators, then the brakes squeal when youre not using them because the pad material wears out quicker than the steel on the squealer so when you are driving it, it will squeal no matter what. If you do have thickness on the pads, then I would resurface the rotors first and see if you get a squeal if not then buy mitsubishi pads and the problem should go away...
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| orange914 |
Apr 21 2009, 06:32 PM
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#7
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http://5starmediaworks.com/index.html Group: Members Posts: 3,371 Joined: 26-March 05 From: Ceres, California Member No.: 3,818 Region Association: Northern California |
QUOTE(type2man @ Apr 21 2009, 04:16 PM) If your brakes are indeed down to the wear indicators, then the brakes squeal when youre not using them because the pad material wears out quicker than the steel on the squealer so when you are driving it, it will squeal no matter what. (IMG:style_emoticons/default/agree.gif) does he have heavy metalic pads or are the disc glazed? |
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| dbgriffith75 |
Apr 21 2009, 06:56 PM
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TheGrif Group: Members Posts: 509 Joined: 25-July 07 From: Iowa, USA Member No.: 7,945 Region Association: Upper MidWest |
Thanks for the advice guys.
Orange914- I don't know for sure what kind of pads are on the car- we'll have to get things apart to find out. |
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| orange914 |
Apr 21 2009, 08:48 PM
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#9
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http://5starmediaworks.com/index.html Group: Members Posts: 3,371 Joined: 26-March 05 From: Ceres, California Member No.: 3,818 Region Association: Northern California |
QUOTE(dbgriffith75 @ Apr 21 2009, 04:56 PM) Thanks for the advice guys. Orange914- I don't know for sure what kind of pads are on the car- we'll have to get things apart to find out. if you have them off it would be good to deglaze the pads & rotors with a scotch brite pad. i'd put some anti-squeel on the back side too. i've seen high metalic pads rust just enough to make goobs of noise until it's run off. has yours sat long this winter? |
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| r_towle |
Apr 21 2009, 08:51 PM
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#10
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Custom Member Group: Members Posts: 24,591 Joined: 9-January 03 From: Taxachusetts Member No.: 124 Region Association: North East States
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I had the retaine spring middle rivet break and then the spring started to rub against the top of the rotor.
Rich |
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