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Brake Specialist Needed

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Old Oct 22, 2010 | 07:46 AM
  #1  
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From: Keesler AFB, MS
Year: 1998 XJ
Model: Cherokee
Engine: 4.0L
Default Brake Specialist Needed

This has been happening for a year now and i am sick of it.

My front brakes squell like crazy. Heres a flow chart of what i have done


New pads, rotors, and calipers.

Changed out pads, Thought i might have picked up some bad pads (still squelling)

Took pads off and sprayed disk quiet on all contact parts. (still squelled)

Changed out pads again to thermoquiet ceramics. (Still squells)

Wondering now could i have picked up some bad rotors or maybe they got to hot.

Anyone ever heard of anything like this? If so, Help

Thanks
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Old Oct 22, 2010 | 07:59 AM
  #2  
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From: gilman,il
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i had same problem, replaced everything. i got sum spray from napa that u spray on back of pads, kinda tacky, and u spray alot on pads. cant remember name, something like brake quiet? anyhow after i sprayed pads, pumped up brakes for pressure and drove - nice & quiet.
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Old Oct 22, 2010 | 08:12 AM
  #3  
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From: West Valley
Year: 1998
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I'll be watching this thread, mine does the exact same thing. Drives me nuts!
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Old Oct 22, 2010 | 08:18 AM
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From: Miami,Fl
Year: 1998
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Engine: 4.0 L6 Srt
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Do you guys put break pad grease on the back side of the pads.. I know with my other cars if i wouldn't put that on, ill be squealing like that the pig commercial.. i see your using the spray but i dont think that is affective... Work for one of you but you sprayed the crap out of them..

on another note: are they always squealing or when you apply pressure?

Last edited by 98jeepsrt6; Oct 22, 2010 at 08:19 AM. Reason: Cant spell :/
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Old Oct 22, 2010 | 09:07 AM
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If you dont spray the grease off of the rotors before you put them on with some brake cleaner or even your basic dish soap is what is supposed to be used the first time you hit the brakes they will burn that grease into the rotor and the only thing you can do it turn them down really really low or get new ones.

Worked as a head tech for 3 years, i have seen it happen alot.
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Old Oct 22, 2010 | 09:31 AM
  #6  
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From: Broward County Fl.
Year: 1989 xj sport 2dr
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they make metal pc that go on the back of the brake pads try and find these they should do the work
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Old Oct 22, 2010 | 09:34 AM
  #7  
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they will look similar to these but for your pads
Attached Images  
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Old Oct 22, 2010 | 09:52 AM
  #8  
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do you have the pad shims in there? when i got my truck he said that the front brakes were "new" yes they where but they where worng.. they squelled like no other..

when i redid them i put these in hi temp grease on EVERYTHING!.. and not a peep out of them

http://catalog.woodys-auto-supply.co.../SG642_ANG.jpg
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Old Oct 22, 2010 | 10:42 AM
  #9  
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From: Keesler AFB, MS
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Originally Posted by 95THORxj
i had same problem, replaced everything. i got sum spray from napa that u spray on back of pads, kinda tacky, and u spray alot on pads. cant remember name, something like brake quiet? anyhow after i sprayed pads, pumped up brakes for pressure and drove - nice & quiet.
Yeah i used disk brake quiet, gets real tacky

Originally Posted by 98jeepsrt6
Do you guys put break pad grease on the back side of the pads.. I know with my other cars if i wouldn't put that on, ill be squealing like that the pig commercial.. i see your using the spray but i dont think that is affective... Work for one of you but you sprayed the crap out of them..

on another note: are they always squealing or when you apply pressure?
They only squell at around 20 mph and below when applying pressure. Like said earlier, i used that spray tacky stuff but i will deffinetly look into the actual grease now

Originally Posted by Ls1Powerz
If you dont spray the grease off of the rotors before you put them on with some brake cleaner or even your basic dish soap is what is supposed to be used the first time you hit the brakes they will burn that grease into the rotor and the only thing you can do it turn them down really really low or get new ones.

Worked as a head tech for 3 years, i have seen it happen alot.
Honestly, that could be the issue. i probably got some grease on the pad when i first replaced them and if thats correct, it could be a bad rotor now. So i could probably replace the rotors and hit the pads with some brake cleaner and sand paper and be good to go. Hopefully.

Originally Posted by aj6
do you have the pad shims in there? when i got my truck he said that the front brakes were "new" yes they where but they where worng.. they squelled like no other..

when i redid them i put these in hi temp grease on EVERYTHING!.. and not a peep out of them

http://catalog.woodys-auto-supply.co.../SG642_ANG.jpg
I just took them apart the other day and put the shims that adjust the up and down play. It had to be in between .010 and .015. I know that part is good. But i will as Advanced auto about the shims that go on the back. And yes, There is disk brake quiet on every contact point.
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Old Oct 22, 2010 | 11:04 AM
  #10  
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they should stop the sq
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Old Oct 22, 2010 | 11:09 AM
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I would be careful about sanding your pads too, as it does work sometimes it also can scuff them up a little too much in certain areas and make them squeel even more. your best bet is to get new pads and new rotors and turn maybe .05 off of the new rotors and not worry about it any more. if you got the pads at any local parts store like oreilly's autozone or napa they should warranty them for you, just tell them they were bad pads to begin with and they should honor it. Just my .02
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Old Oct 22, 2010 | 11:37 AM
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From: Keesler AFB, MS
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Originally Posted by Ls1Powerz
I would be careful about sanding your pads too, as it does work sometimes it also can scuff them up a little too much in certain areas and make them squeel even more. your best bet is to get new pads and new rotors and turn maybe .05 off of the new rotors and not worry about it any more. if you got the pads at any local parts store like oreilly's autozone or napa they should warranty them for you, just tell them they were bad pads to begin with and they should honor it. Just my .02
So you are saying get some brand new rotors and have them turned? Just wondering the reasoning behind turning new rotors
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Old Oct 22, 2010 | 11:48 AM
  #13  
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From: Broward County Fl.
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napa sells the brake shims take take the other pads back and buy the pads and shims from napa
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Old Oct 22, 2010 | 11:49 AM
  #14  
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Year: 1989 xj sport 2dr
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Engine: 12 hole bosch Injectors
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Originally Posted by warthog
Yeah i used disk brake quiet, gets real tacky



They only squell at around 20 mph and below when applying pressure. Like said earlier, i used that spray tacky stuff but i will deffinetly look into the actual grease now



Honestly, that could be the issue. i probably got some grease on the pad when i first replaced them and if thats correct, it could be a bad rotor now. So i could probably replace the rotors and hit the pads with some brake cleaner and sand paper and be good to go. Hopefully.



I just took them apart the other day and put the shims that adjust the up and down play. It had to be in between .010 and .015. I know that part is good. But i will as Advanced auto about the shims that go on the back. And yes, There is disk brake quiet on every contact point.
what these are anti rattle clips not squeek shims
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Old Oct 22, 2010 | 11:54 AM
  #15  
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the things you put on the other day looked like this
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