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Username Post: 08 Malibu brake vibration keeps returning        (Topic#356166)
Michael Hamilton 
Senior Member
Posts: 181
Michael Hamilton
Loc: North Carolina
Reg: 10-15-04
04-26-19 05:27 AM - Post#2765061    

Hi,

I have a 2008 Malibu (classic) that I use as my commuter car. Owned this car since around 2010 and had no issues with brakes until recently. Here's what's happened so far:

1. October 2017 at 107k miles it developed a really bad vibration when braking, the whole front end would shake violently. At that mileage I figured it was due for new brakes so I replaced the OEM rotors and pads with Raybestos. Brakes were nice and smooth for a few months.

2. October 2018 the brake vibration had gotten just as bad again. I checked everything up front: found I had a loose outer tie rod, replaced that and had an alignment, same vibration. Found that one of my caliper pins was sticking so thought "ah ha" that must be it. Cleaned pins well, replaced all the brake hardware, rubber pieces on pins, lubed with Sylgard. Installed new coated rotors from NAPA, kept same pads. Also flushed the brake fluid. Nice smooth brakes until now.

3. 5 months later the vibration is returning.

I can't believe that 3 rotors and 2 sets of pads all develop the same issue on this car. There must be something I've missed. Struts and mounts are new. Rotating tires have no effect. Car tracks well and I don't feel anything loose in the front end. I must be overlooking something obvious on a simple brake job



Edited by Michael Hamilton on 04-26-19 05:36 AM. Reason for edit: No reason given.

 




Shepherd 
Frequent Contributor
Posts: 1743

Loc: Lake George, NY
Reg: 11-11-15
04-26-19 06:44 PM - Post#2765121    
    In response to Michael Hamilton

Have you confirmed the rotors have excessive runout? Did you thoroughly clean the rotor mounting surface on the hubs? No excess play in the wheel bearings?



Edited by Shepherd on 04-26-19 06:45 PM. Reason for edit: No reason given.

 
Michael Hamilton 
Senior Member
Posts: 181
Michael Hamilton
Loc: North Carolina
Reg: 10-15-04
04-30-19 07:28 AM - Post#2765374    
    In response to Shepherd

I've checked the bearings for any play, nothing is loose. I did clean the hubs thoroughly, although there was very little rust.

I did try to check the runout with a dial indicator on the last set of rotors. I didn't measure anything appreciable, but I was having issues with the mount staying steady.

Are you thinking pad deposits are the culprit?





 
Shepherd 
Frequent Contributor
Posts: 1743

Loc: Lake George, NY
Reg: 11-11-15
04-30-19 12:29 PM - Post#2765393    
    In response to Michael Hamilton

Could be, but to really diagnose this you need to confirm .003 or less runout.



 
junkman104 
Frequent Contributor
Posts: 1360
junkman104
Age: 60
Loc: Murphy N.C.
Reg: 01-25-14
04-30-19 05:49 PM - Post#2765419    
    In response to Shepherd

Caliper slides not lubed and moving freely and brake hoses failing internally are another thing to check. Pads that have excessive drag cause high heat temps.



 




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