Changed Rotors/pads Now Excessive Squeal

[dillpicklelsu]

I have an 06 sierra crew cab z71. I had about 112000 on the odo so I figured I'd change brakes and shocks. I bought delco rotors and napa ceramic pads. I am finding that they squeal a bit while just rolling and it gets really bad when I push the brakes...I thought it was coming from one side so I jacked up the truck and turned each wheel by hand...they both squeak, one side a little higher pitched than the other. I've done a hand full of brake jobs in the past and I did everything the same. I installed all of the clips into the caliper and greased the back of the pad....any ideas..anyone???

[Deichler]

When I do a brake job, I use Brakleen on the Rotors and Pads. Especially if they are new, there is a thin film on these parts to keep them from corroding or rusting in storage. Also, I lube the slides on the caliper also, cheap insurance. If you did all of that, I don't know what to tell you, maybe they are just getting broke in, i don't know. I know I did rear brakes on my 02 Silverado I had, that had disk and they squeeled for a while, but then it went away.

[dillpicklelsu]

When I do a brake job, I use Brakleen on the Rotors and Pads. Especially if they are new, there is a thin film on these parts to keep them from corroding or rusting in storage. Also, I lube the slides on the caliper also, cheap insurance. If you did all of that, I don't know what to tell you, maybe they are just getting broke in, i don't know. I know I did rear brakes on my 02 Silverado I had, that had disk and they squeeled for a while, but then it went away.

 

I had sprayed brake cleaner on everything when I reinstalled..I don't know..it's still squealing...it sounds a little worse when I'm turning and braking at the same time...I'm also starting to think I have a hub bearing on the way out....I had both of them go at 60K and every once in a while I can hear/feel a slight groan, just the way it started out last time

[ken1mod]

Disc brakes tend to be noisey. Pad designers have to balance noise, hot friction, cold friction and other factors to make a pad. Noisey pads do not indicate faulty pads. You may well have superior braking because the engineers sacrificed noise for braking power.

 

Hope this helps. Maybe you should turn up the stereo.

 

ken

[MarkD]

I always put a dab (very little) of high temp rtv between the pad and the shim (back) and where it contacts the caliper.

[jblakeney]

I have an 06 sierra crew cab z71. I had about 112000 on the odo so I figured I'd change brakes and shocks. I bought delco rotors and napa ceramic pads. I am finding that they squeal a bit while just rolling and it gets really bad when I push the brakes...I thought it was coming from one side so I jacked up the truck and turned each wheel by hand...they both squeak, one side a little higher pitched than the other. I've done a hand full of brake jobs in the past and I did everything the same. I installed all of the clips into the caliper and greased the back of the pad....any ideas..anyone???

 

Here is the procedure I always do I can not remember one that had a squeal after I did the brakes:

 

1. High quality pads. Not sure which ones you bought. As all 3 grades of pads have Ceramics in the line up. The range in quality from low to high in this list. TS----X, SS----X, UP----X, AD---- (in 06 the pad number on the front is 7997 and 7653 if hybrid). The NAPA Premium Brakes (which is the last two in the line up) is all I USE, unless it is OE stuff.

2. NEW ROTORS OR TURN ROTORS!!! Never put new pads on old rotors that have not been turned...

3. Flush and Bleed Brakes system.

4. Remove Old parts

5. Replace rotors on hub. If using old rotors make sure hub is clean of all debris on the back and front of the hub of the rotor.

6. Replace caliper brackets.

7. SPRAY thoroughly the entire ROTOR, with Brake Clean. This is important since any oil (even the stuff that is excreted from your skin can cause this issue) on the rotor surface can cause the brakes to squeal, as well as the fluid the new rotors are coated in to prevent them from rusting in the box.

8. Spray calipers with Brake Clean to remove all brake dust and old grease from the slides.

9. Relube the slides on the calipers and brackets.

10. Replace all shims, anti-rattle clips, and pad holding devices.

11. Put pads in caliper.

12. Rewash Rotor with brake clean.

13. Put caliper back on the bracket.

14. Tighten caliper back to spec.

15. Clean hub of wheel (Corrosion here can cause a noise also).

16. Replace wheel and tighten to spec.

17. Do other side same way.

18. Lower vehicle and bed-in. I usually bring the vehicle up to 30 then come completely to a stop, then 45, 55, 65, and then 75 then 50, then 30. Also, gives you a good second to hear if the brake job is quite.

 

I am a NAPA jobber.

 

Every set I have installed for myself or a friend or customer. Quite as a mouse on Sunday......

 

Jbo

 

edit: I never use any kind of disc brake quite products (neither do they at the factory)... That is what the shims are for!!!!!

[c4cruiser]

If there was any sort of material like a coating or oil on the rotor surface, it has since transferred to the pads and that is most likely why you are hearing some squealing.

 

You might try removing the pads and lightly scuffing the surface with some 200 grit wet/dry paper. I would use some hot soapy water to clean the pad surface and re-install the pads.

 

Most ceramic pads don't require any sort of bedding-in but after cleaning and scuffing the pads, go find a straight road with no traffic you can make 4-5 stops from 35-40 to a near stop using medium-hard pedal pressure then repeat by going faster like 55-60 to near 0. Let the brakes cool for 15 minutes without using them.

[Bish]

Another option to try. Do a high speed heavy braking run like 90mph - 20 mph but DO NOT STOP or it will transfer friction material to the rotor unevenly. This will actually take the friction material off the rotor and require a re-bedding as if you just put them on. Might boil off any film on the pads or rotors. Worth a shot before you start taking stuff apart.

[jrrod2004]

I have an 06 sierra crew cab z71. I had about 112000 on the odo so I figured I'd change brakes and shocks. I bought delco rotors and napa ceramic pads. I am finding that they squeal a bit while just rolling and it gets really bad when I push the brakes...I thought it was coming from one side so I jacked up the truck and turned each wheel by hand...they both squeak, one side a little higher pitched than the other. I've done a hand full of brake jobs in the past and I did everything the same. I installed all of the clips into the caliper and greased the back of the pad....any ideas..anyone???

 

Here is the procedure I always do I can not remember one that had a squeal after I did the brakes:

 

1. High quality pads. Not sure which ones you bought. As all 3 grades of pads have Ceramics in the line up. The range in quality from low to high in this list. TS----X, SS----X, UP----X, AD---- (in 06 the pad number on the front is 7997 and 7653 if hybrid). The NAPA Premium Brakes (which is the last two in the line up) is all I USE, unless it is OE stuff.

2. NEW ROTORS OR TURN ROTORS!!! Never put new pads on old rotors that have not been turned...

3. Flush and Bleed Brakes system.

4. Remove Old parts

5. Replace rotors on hub. If using old rotors make sure hub is clean of all debris on the back and front of the hub of the rotor.

6. Replace caliper brackets.

7. SPRAY thoroughly the entire ROTOR, with Brake Clean. This is important since any oil (even the stuff that is excreted from your skin can cause this issue) on the rotor surface can cause the brakes to squeal, as well as the fluid the new rotors are coated in to prevent them from rusting in the box.

8. Spray calipers with Brake Clean to remove all brake dust and old grease from the slides.

9. Relube the slides on the calipers and brackets.

10. Replace all shims, anti-rattle clips, and pad holding devices.

11. Put pads in caliper.

12. Rewash Rotor with brake clean.

13. Put caliper back on the bracket.

14. Tighten caliper back to spec.

15. Clean hub of wheel (Corrosion here can cause a noise also).

16. Replace wheel and tighten to spec.

17. Do other side same way.

18. Lower vehicle and bed-in. I usually bring the vehicle up to 30 then come completely to a stop, then 45, 55, 65, and then 75 then 50, then 30. Also, gives you a good second to hear if the brake job is quite.

 

I am a NAPA jobber.

 

Every set I have installed for myself or a friend or customer. Quite as a mouse on Sunday......

 

Jbo

 

edit: I never use any kind of disc brake quite products (neither do they at the factory)... That is what the shims are for!!!!!

 

 

 

 

You are about to become by best friend.

[herkdriver007]

Try bedding your brakes in, works great, esp with new gear:

 

http://www.zeckhausen.com/bedding_in_brakes.htm

[jro909]

the screech should go away as the coating on the pads and rotors is burnt off, i have new pads and rotors and they still squeek and scream..its normal

[jblakeney]

I have an 06 sierra crew cab z71. I had about 112000 on the odo so I figured I'd change brakes and shocks. I bought delco rotors and napa ceramic pads. I am finding that they squeal a bit while just rolling and it gets really bad when I push the brakes...I thought it was coming from one side so I jacked up the truck and turned each wheel by hand...they both squeak, one side a little higher pitched than the other. I've done a hand full of brake jobs in the past and I did everything the same. I installed all of the clips into the caliper and greased the back of the pad....any ideas..anyone???

 

Here is the procedure I always do I can not remember one that had a squeal after I did the brakes:

 

1. High quality pads. Not sure which ones you bought. As all 3 grades of pads have Ceramics in the line up. The range in quality from low to high in this list. TS----X, SS----X, UP----X, AD---- (in 06 the pad number on the front is 7997 and 7653 if hybrid). The NAPA Premium Brakes (which is the last two in the line up) is all I USE, unless it is OE stuff.

2. NEW ROTORS OR TURN ROTORS!!! Never put new pads on old rotors that have not been turned...

3. Flush and Bleed Brakes system.

4. Remove Old parts

5. Replace rotors on hub. If using old rotors make sure hub is clean of all debris on the back and front of the hub of the rotor.

6. Replace caliper brackets.

7. SPRAY thoroughly the entire ROTOR, with Brake Clean. This is important since any oil (even the stuff that is excreted from your skin can cause this issue) on the rotor surface can cause the brakes to squeal, as well as the fluid the new rotors are coated in to prevent them from rusting in the box.

8. Spray calipers with Brake Clean to remove all brake dust and old grease from the slides.

9. Relube the slides on the calipers and brackets.

10. Replace all shims, anti-rattle clips, and pad holding devices.

11. Put pads in caliper.

12. Rewash Rotor with brake clean.

13. Put caliper back on the bracket.

14. Tighten caliper back to spec.

15. Clean hub of wheel (Corrosion here can cause a noise also).

16. Replace wheel and tighten to spec.

17. Do other side same way.

18. Lower vehicle and bed-in. I usually bring the vehicle up to 30 then come completely to a stop, then 45, 55, 65, and then 75 then 50, then 30. Also, gives you a good second to hear if the brake job is quite.

 

I am a NAPA jobber.

 

Every set I have installed for myself or a friend or customer. Quite as a mouse on Sunday......

 

Jbo

 

edit: I never use any kind of disc brake quite products (neither do they at the factory)... That is what the shims are for!!!!!

 

 

 

 

You are about to become by best friend.

 

 

How's that???

 

Jbo

[jrrod2004]

You are about to become by best friend.

How's that???

Jbo

 

Cause you are a NAPA jobber and from the looks of the last post, you have a FIRM grasp on how to deal with automotive issues. Cant say the same for the local Oriellys or NAPA place (though the NAPA place seems to get better with time)

[jblakeney]

You are about to become by best friend.

How's that???

Jbo

 

Cause you are a NAPA jobber and from the looks of the last post, you have a FIRM grasp on how to deal with automotive issues. Cant say the same for the local Oriellys or NAPA place (though the NAPA place seems to get better with time)

 

 

Yeah, my family has been doing it since 1948... We have owned a NAPA store since 1971... We currently have 2 stores...

 

Jbo