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Rear Brake Pad Replacement
 
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Pelican Technical Article:

Rear Brake Pad Replacement

Jared Fenton

Time:

2 hours2 hrs

Tab:

$40 to $75

Talent:

****

Tools:

7mm hex socket, pliers, brake piston tool, screwdrivers

Applicable Models:

Volvo C30 T5 (2008-13)
Volvo C30 T5 R-Design (2008-13)

Parts Required:

Rear brake pads

Hot Tip:

Use a brake piston tool to retract the piston

Performance Gain:

Better braking

Complementary Modification:

Replace brake discs

Replacing your brake pads is one of the easier jobs to perform on your C30. In general, you should inspect your brake pads about every 10,000 miles and replace them if the brake lining of the pad has worn down enough to risk damaging the rotors.

If you ignore the problem after inspection and keep driving, the brake lining of the pad will wear away completely and the metal backing plate will start to grind into the metal face of the rotor. Using the brakes during this condition will not only give you inadequate braking, but will also begin to cut grooves in your brake discs. Once the discs are grooved, they are damaged, and there is often no way to repair them. Resurfacing will sometimes work, but often the groove cut will be deeper than is allowed by Volvo specifications. The smart thing to do is to replace your pads right away.

The procedure for replacing pads on all the wheels is basically the same. There are slight configuration differences between front and rear brakes, but in general the procedure for replacement is similar.

This procedure requires jacking up the rear of the car and removing the rear wheels. Please see our article on Jacking up your C30 for more information.

When you are finished, press on the brake pedal repeatedly to make sure that the pads and the pistons seat properly. Also check the master cylinder brake fluid reservoir and top off the fluid if necessary. Brake pads typically take between 100 and 200 miles to completely break in. It's typical for braking performance to suffer slightly as the pads begin their wear-in period. Make sure that you avoid any heavy braking during this period.

Left and Right Sides - Remove the five 19mm lug nuts holding the tire to the car and remove the wheel.
Figure 1

Left and Right Sides - Remove the five 19mm lug nuts holding the tire to the car and remove the wheel. If you do not have an impact wrench, you'll need to slightly loosen each lug nut with the wheel on the ground. This will make it much easier to remove the lug nuts once the tire is off the ground.

Left and Right Sides - Shown here is the complete rear brake assembly on your Volvo C30.
Figure 2

Left and Right Sides - Shown here is the complete rear brake assembly on your Volvo C30.

Left and Right Sides - Remove the retaining spring (yellow arrow) on the front of the brake caliper.
Figure 3

Left and Right Sides - Remove the retaining spring (yellow arrow) on the front of the brake caliper. These can be a little tricky to remove. I usually start at one of the ends (green arrows) and slowly work it off.

Left and Right Sides - Pry the two plastic plugs (green arrows) out of the guide tubes.
Figure 4

Left and Right Sides - Pry the two plastic plugs (green arrows) out of the guide tubes. You'll need to access the caliper retaining pins below.

Left and Right Sides - Use a 7mm hex driver to loosen both caliper retaining pins inside the guide tubes.
Figure 5

Left and Right Sides - Use a 7mm hex driver to loosen both caliper retaining pins inside the guide tubes.

Left and Right Sides - Once they have been removed carefully lift the caliper up and off the lower frame and remove the old brake pads.
Figure 6

Left and Right Sides - Once they have been removed carefully lift the caliper up and off the lower frame and remove the old brake pads.

Left and Right Sides - One of the brake pads is attached to the caliper piston with an expanding spring.
Figure 7

Left and Right Sides - One of the brake pads is attached to the caliper piston with an expanding spring. Pull the brake pad out of the caliper. It may take a bit more force that you think.

Left and Right Sides - Clean and inspect the piston for rust or corrosion inside.
Figure 8

Left and Right Sides - Clean and inspect the piston for rust or corrosion inside. Also inspect the rubber dust seal for any cracking or tears. If it is cracked, you may want to consider installing a new seal or rebuild the caliper. Note the two holes cast into the piston (green arrows). These holes are designed to be used with a brake piston tool in order to retract the piston.

Left and Right Sides - As the brake pad wears, the piston will extend further out of its bore.
Figure 9

Left and Right Sides - As the brake pad wears, the piston will extend further out of its bore. Installing new pads requires pushing the piston back inside the bore. The rear calipers have the parking brake assembly integrated into the caliper. Hence you also need to turn the piston as you press. You need a brake piston tool as shown here to do the job.

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Comments and Suggestions:
Metalmike Comments: Thanks for the heads up on getting the pistons set back in position for new pads. caliper Pistons screw back into position 😄
Thanks
December 2, 2016

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