Hub and Bearing Question (rotor shield and spacer)
 

I will be replacing the hub/bearing assy this weekend. I'm not sure I understand about the rotor shield and the spacer. Do I need both? Or, if you use the rotor splash shield it takes place of the spacer?

I have a part number of 25884778 for the right side rotor shield, but don't know the pn for the spacer.

Thanks,

You use one or the other not both. Here is a copy or the tsb for the shields

08-05-23-003
Here is the bulletin about brake pulsation and the splash shields as promised in another post....will also post it there..

#08-05-23-003: Front Brake Noise, Brake Pulsation, Front Brake Inner Pad Wear (Replace Front Brake Pads and Add Splash Shields) - (Mar 20, 2008)


Subject: Front Brake Noise, Brake Pulsation, Front Brake Inner Pad Wear (Replace Front Brake Pads and Add Splash Shields)


Models: 2006-2008 Chevrolet HHR




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Condition
Some customers may comment on a brake noise and/or pulsation on brake apply. This condition can be more frequent if the customer resides or travels on dirt/gravel roads and usually occurs within 11,300 km (7,000 mi) to 16,000 km (10,000 mi) intervals.

Upon investigation, the technician may find that there is considerable difference between the front brake outer and inner pad thickness.

Cause
This condition may be due dust, dirt, and debris intruding between the inner brake pad and rotor.

Correction
Road test the vehicle and confirm that the brake noise and/or pulsation is coming from the front brakes. If it is determined that the noise is coming from the front brakes and there is a measurable difference between the outer and inner pad thickness, remove the front wheel bearing/hub assembly following published SI procedures, remove the bearing/hub-to-steering knuckle spacer and replace the spacer with a splash shield on each side.

Replace the front brake pads and follow the procedures outlined in Service Bulletin 00-05-22-002J for servicing the disc brake rotors.

Parts Information
Part Number
Description
Qty

25884778
Shield, Front Brake (Right)
1

25884779
Shield, Front Brake (Left)
1
__________________

now that is informative, Thanks Lucky!! are these for the 10.85 inch rotors or the larger 11.65 inch rotors?

I never thought about rotor size. I installed them on my 08 2LT. I would assume they can be used on either.

I never noticed a problem with my old 2008 with the funky spacer, my 2011 has the shields no difference to me.

I don't remember ever seeing front disc pads wear even.

I found this #08-05-23-003B: Front Brake Noise, Brake Pulsation, Front Brake Inner Pad Wear (Replace Front Brake Pads and Add Splash Shields) - (Jul 21, 2008)


Subject: Front Brake Noise, Brake Pulsation, Front Brake Inner Pad Wear (Replace Front Brake Pads and Add Splash Shields)


Models: 2005-2008 Chevrolet Cobalt (Excludes SS Models)

2006-2008 Chevrolet HHR (Excludes SS Models)

2006 Pontiac Pursuit (Canada Only)

2007-2008 Pontiac G5




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This bulletin is being revised to clarify the vehicles involved in the model and parts information. Please discard Corporate Bulletin Number 08-05-23-003A (Section 05 -- Brakes).


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Condition
Some customers may comment on a brake noise and/or pulsation on brake apply. This condition can be more frequent if the customer resides or travels on dirt/gravel roads and usually occurs within 11,300 km (7,000 mi) to 16,000 km (10,000 mi) intervals.

Upon investigation, the technician may find that there is considerable difference between the front brake outer and inner pad thickness.

Cause
This condition may be due dust, dirt, and debris intruding between the inner brake pad and rotor.

Correction
Road test the vehicle and confirm that the brake noise and/or pulsation is coming from the front brakes. If it is determined that the noise is coming from the front brakes and there is a measurable difference between the outer and inner pad thickness, remove the front wheel bearing/hub assembly following published SI procedures, remove the bearing/hub-to-steering knuckle ****er and replace the ****er with a splash shield on each side.

Replace the front brake pads and follow the procedures outlined in Service Bulletin 00-05-22-002J for servicing the disc brake rotors.

Parts Information
Part Number
Description
Model
Usage

25884778
Shield, Front Brake (RH)
HHR
(EXC JL9)

Cobalt/G5/Pursuit

(EXC Cobalt SS)
w/ JL9 (level 3) (296 mm rotor)

(EXC JL4)

25884779
Shield, Front Brake (LH)
HHR

(EXC SS)
All

(EXC JL9)

Cobalt/G5/Pursuit

(EXC Cobalt SS)
w/ JL9 (level 3) (296 mm rotor)

(EXC JL4)

25931624
Shield, Front Brake (RH)
Cobalt/G5/Pursuit

(EXC Cobalt SS)
w/ J41 or

JM4 & PFD/PG1 or

JM4 & NZ0/NZ6

(level 0, 1 & 2) 256 and 280 mm rotors)

25931625
Shield, Front Brake (LH)


Warranty Information
For vehicles repaired under warranty, use:

Labor Operation
Description
Labor Time

H9730*
Replace Front Brake Pads and Add Splash Shields (Inc Refinish Rotors)
2.2 hrs
which excludes SS models but does specify Cobalt SS 296 MM rotors, so I'll maybe add them next time I change out my bearing hubs

Nice find :thumb: