Disc Brake System Buick Rendezvous I

Fastener Tightening Specifications

Fastener Tightening Specifications

Disc Brake Component Specifications

Disc Brake Component Specifications

Diagnostic Starting Point - Disc Brakes

Begin the disc brake system diagnosis with Diagnostic Starting Point - Hydraulic Brakes in Hydraulic Brakes. The use of the Diagnostic Starting Point will lead to the identification of the correct procedure for diagnosing the system and where the procedure is located.

Brake Rotor Thickness Measurement

1. If the inboard friction surface of the brake rotor is not accessible, reposition and support the caliper with the brake pads. Refer to «Brake Pads Replacement - Front»(/buick/rendezvous/i-2001-2007/remont/mechanical-hydraulic/#disc-brake-system) and/or «Brake Pads Replacement - Rear»(/buick/rendezvous/i-2001-2007/remont/mechanical-hydraulic/#disc-brake-system) , if equipped.
2. Clean the friction surfaces of the brake rotor with denatured alcohol, or an equivalent approved brake cleaner.
3. Using a micrometer calibrated in thousanths-of-a-millimeter, or ten-thousanths-of-an-inch, measure and record the thickness of the brake rotor at four or more points, evenly spaced around the rotor. Ensure that the measurements are only taken within the friction surfaces and that the micrometer is positioned the same distance from the outer edge of the rotor, about 13 mm (1/2 in), for each measurement.
4. Compare the lowest thickness measurement recorded to the following specifications: Specification: Front brake rotor minimum allowable thickness after refinishing: 28.4 mm (1.118 in) Rear brake rotor minimum allowable thickness after refinishing: 10.6 mm (0.42 in) Front brake rotor discard thickness: 27.0 mm (1.063 in) Rear brake rotor discard thickness: 9.0 mm (0.35 in)
5. If the lowest thickness measurement of the brake rotor is above the minimum allowable thickness after refinishing specification, the rotor may be able to be refinished, depending upon surface and wear conditions which may be present.
6. If the lowest thickness measurement of the brake rotor is at or below the minimum allowable thickness after refinishing specification, the rotor may not be refinished.
7. If the lowest thickness measurement of the brake rotor is at or below the discard thickness specification, the rotor requires replacement.

Brake Rotor Thickness Variation Measurement

1. If the inboard friction surface of the brake rotor is not accessible, reposition and support the caliper with the brake pads. Refer to «Brake Pads Replacement - Front»(/buick/rendezvous/i-2001-2007/remont/mechanical-hydraulic/#disc-brake-system) and/or «Brake Pads Replacement - Rear»(/buick/rendezvous/i-2001-2007/remont/mechanical-hydraulic/#disc-brake-system) , if equipped.
2. Clean the friction surfaces of the brake rotor with denatured alcohol, or an equivalent approved brake cleaner.
3. Using a micrometer calibrated in thousanths-of-a-millimeter, or ten-thousanths-of-an-inch, measure and record the thickness of the brake rotor at four or more points, evenly spaced around the rotor. Ensure that the measurements are only taken within the friction surfaces and that the micrometer is positioned the same distance from the outer edge of the rotor, about 13 mm (0.5 in), for each measurement.
4. Calculate the difference between the highest and lowest thickness measurements recorded to obtain the amount of thickness variation.
5. Compare the thickness variation measurement to the following specification: Specification: Brake rotor maximum allowable thickness variation: 0.025 mm (0.001 in)
6. If the brake rotor thickness variation measurement exceeds the specification, the rotor requires refinishing or replacement.

Brake Rotor Surface and Wear Inspection

1. If the inboard friction surface of the brake rotor is not accessible, reposition and support the caliper with the brake pads. Refer to «Brake Pads Replacement - Front»(/buick/rendezvous/i-2001-2007/remont/mechanical-hydraulic/#disc-brake-system) and/or «Brake Pads Replacement - Rear»(/buick/rendezvous/i-2001-2007/remont/mechanical-hydraulic/#disc-brake-system) , if equipped.
2. Clean the friction surfaces of the brake rotor with denatured alcohol, or an equivalent approved brake cleaner.
3. Inspect the friction surfaces of the brake rotor for the following Braking Surface Conditions: Heavy rust and/or pitting Light surface rust can be removed with an abrasive disc. Heavy surface rust and/or pitting must be removed by refinishing the rotor. Cracks and/or heat spots Excessive blueing discoloration
4. If the friction surfaces of the brake rotor exhibit one or more of the Braking Surface Conditions, the rotor requires refinishing or replacement.
5. Using a micrometer calibrated in thousanths-of-a-millimeter, or ten-thousanths-of-an-inch, measure and record the scoring depth of any grooves present on the rotor friction surfaces.
6. Compare the groove scoring depth recorded to the following specification: Specification: Brake rotor maximum allowable scoring: 1.50 mm (0.059 in)
7. If the brake rotor scoring depth exceeds the specification, or if an excessive amount of scoring is present, the rotor requires refinishing or replacement.

Brake Rotor Assembled Lateral Runout (LRO) Measurement

Tools Required

1. J 39544-KIT Torque-Limiting Socket Set, or equivalent. See «Special Tools and Equipment»(/buick/rendezvous/i-2001-2007/remont/mechanical-hydraulic/#disc-brake-system) .
2. J 41013 Rotor Resurfacing Kit. See «Special Tools and Equipment»(/buick/rendezvous/i-2001-2007/remont/mechanical-hydraulic/#disc-brake-system) .
3. J 42450-A Wheel Hub Resurfacing Kit. See «Special Tools and Equipment»(/buick/rendezvous/i-2001-2007/remont/mechanical-hydraulic/#disc-brake-system) .
4. J 45101 Hub and Wheel Runout Gage. See «Special Tools and Equipment»(/buick/rendezvous/i-2001-2007/remont/mechanical-hydraulic/#disc-brake-system) .
5. J 45101-100 Conical Brake Rotor Washers. See «Special Tools and Equipment»(/buick/rendezvous/i-2001-2007/remont/mechanical-hydraulic/#disc-brake-system) .

1. Matchmark the position of the brake rotor to the wheel studs if this has not been done already.
2. Inspect the mating surface of the hub/axle flange and the brake rotor to ensure that there are no foreign particles, corrosion, rust, or debris remaining. If the wheel hub/axle flange and/or if the brake rotor mating surfaces exhibit these conditions, perform the following steps: Remove the brake rotor from the vehicle. Refer to «Brake Rotor Replacement - Front»(/buick/rendezvous/i-2001-2007/remont/mechanical-hydraulic/#disc-brake-system__brake-rotor-replacement-front) and/or «Brake Rotor Replacement - Rear»(/buick/rendezvous/i-2001-2007/remont/mechanical-hydraulic/#disc-brake-system__brake-rotor-replacement-rear) , if equipped. Using the J 42450-A , thoroughly clean any rust or corrosion from the mating surface of the hub/axle flange. See «Special Tools and Equipment»(/buick/rendezvous/i-2001-2007/remont/mechanical-hydraulic/#disc-brake-system) . Using the J 41013 , thoroughly clean any rust or corrosion from the mating surface of the brake rotor. See «Special Tools and Equipment»(/buick/rendezvous/i-2001-2007/remont/mechanical-hydraulic/#disc-brake-system) . Clean the friction surfaces of the brake rotor with denatured alcohol, or an equivalent approved brake cleaner.
3. Install the rotor to the hub/axle flange using the matchmark made prior to removal.
4. Hold the rotor firmly in place against the hub/axle flange and install one of the J 45101-100 (1), and one lug nut (2) onto the upper-most wheel stud. See «Special Tools and Equipment»(/buick/rendezvous/i-2001-2007/remont/mechanical-hydraulic/#disc-brake-system) .
5. Continue to hold the rotor secure and tighten the lug nut firmly by hand.
6. Install the remaining J 45101-100 and lug nuts onto the wheel studs and tighten the nuts firmly by hand in a star-pattern. See «Special Tools and Equipment»(/buick/rendezvous/i-2001-2007/remont/mechanical-hydraulic/#disc-brake-system) .
7. Using the J 39544-KIT , or equivalent, tighten the lug nuts in a star-pattern to specification, in order to properly secure the rotor. See «Special Tools and Equipment»(/buick/rendezvous/i-2001-2007/remont/mechanical-hydraulic/#disc-brake-system) . Refer to «Tire and Wheel Removal and Installation»(/buick/rendezvous/i-2001-2007/remont/wheel-tire-system/#tires-and-wheels) in Tires and Wheels.
8. If the brake rotor has been REFINISHED or REPLACED with a new rotor, proceed to step 14.
9. If the brake rotor meets the following criteria, proceed to step 10. The rotor is within specifications and is being REUSED. The rotor has NOT been refinished. The rotor does NOT exhibit thickness variation exceeding the maximum allowable level.
10. Mount a dial indicator, J 45101 , or equivalent, to the steering knuckle and position the indicator button so it contacts the brake rotor friction surface at a 90 degree angle, approximately 13 mm (0.5 in) from the outer edge of the rotor.
11. Measure and record the assembled LRO of the brake rotor. Rotate the rotor until the lowest reading is displayed on the indicator dial, then set the dial to zero. Rotate the rotor until the highest reading is displayed on the dial. Mark the location of the high spot relative to the nearest wheel stud, or studs. Measure and record the amount of LRO.
12. Compare the brake rotor assembled LRO to the following specification: Specification: Front brake rotor maximum allowable assembled lateral runout: 0.06 mm (0.002 in) Rear brake rotor maximum allowable assembled lateral runout: 0.06 mm (0.002 in)
13. If the brake rotor assembled LRO is within specifications, proceed to step 18. If the brake rotor assembled LRO exceeds the specification, refinish the rotor to ensure true parallelism, refer to «Brake Rotor Refinishing»(/buick/rendezvous/i-2001-2007/remont/mechanical-hydraulic/#disc-brake-system__brake-rotor-refinishing) . After refinishing the rotor, proceed to step 14.
14. Mount a dial indicator, J 45101 , or equivalent, to the steering knuckle and position the indicator button so it contacts the brake rotor friction surface at a 90 degree angle, approximately 13 mm (0.5 in) from the outer edge of the rotor.
15. Measure and record the assembled LRO of the brake rotor. Rotate the rotor until the lowest reading is displayed on the indicator dial, then set the dial to zero. Rotate the rotor until the highest reading is displayed on the dial. Mark the location of the high spot relative to the nearest wheel stud, or studs. Measure and record the amount of LRO.
16. Compare the brake rotor assembled LRO to the following specification: Specification: Front brake rotor maximum allowable assembled lateral runout: 0.06 mm (0.002 in) Rear brake rotor maximum allowable assembled lateral runout: 0.06 mm (0.002 in)
17. If the brake rotor assembled LRO measurement exceeds the specification, bring the LRO to within specifications. Refer to «Brake Rotor Assembled Lateral Runout (LRO) Correction»(/buick/rendezvous/i-2001-2007/remont/mechanical-hydraulic/#disc-brake-system__brake-rotor-assembled-lateral-runout-lro) .
18. If the brake rotor assembled LRO measurement is within specification, install the brake caliper and depress the brake pedal several times to secure the rotor in place before removing the J 45101-100 and the lug nuts. See «Special Tools and Equipment»(/buick/rendezvous/i-2001-2007/remont/mechanical-hydraulic/#disc-brake-system) .

Brake Pad Inspection

1. Inspect the disc brake pads at regular intervals, or whenever the tire and wheel assemblies are removed from the vehicle.
2. If replacement is necessary, always replace disc brake pads in axle sets.
3. Inspect both edges of the disc brake pad friction surfaces (3). The highest rate of wear normally occurs at the trailing edge of the disc brake pads.
4. Inspect the thickness of the disc brake pads (3) in order to ensure that they have not worn prematurely. The disc brake pad wear should be approximately even per axle set.
5. Both front and rear disc brake pads have integral, audible wear sensors (1). When the disc brake pad wear reaches the minimum allowable thickness, the wear sensor contacts the disc brake rotor (2). The wear indicator will then produce an audible, high-pitched warning noise during wheel rotation.
6. Replace the disc brake pads when the friction surface (3) is worn to within 0.76 mm (0.030 in) of the mounting plates.
7. Remove the brake calipers and inspect the friction surfaces of the inner and outer disc brake pads to ensure that they are level. Place the disc brake pad friction surfaces together and measure the gap between the surfaces. If more than 0.13 mm (0.005 in) gap exists midway between the length of the disc brake pads, replace the disc brake pads.
8. Verify that any disc brake pad shims that may be required are in place and not damaged or excessively corroded. Replace any missing or damaged shims in order to preserve proper disc brake performance.
9. Replace the disc brake pads if any have separated from the mounting plates.
10. Inspect the disc brake pads friction surfaces for cracks, fractures, or damage which may cause noise or otherwise impair disc brake performance.

Brake Caliper Inspection

1. Inspect the brake caliper housing (1) for cracks, excess wear, and/or damage. If any of these conditions are present, the brake caliper requires replacement.
2. Inspect the caliper piston dust boot seal (2) for cracks, tears, cuts, deterioration and/or improper seating in the caliper body. If any of these conditions are present, the brake caliper requires overhaul or replacement.
3. Inspect for brake fluid leakage around the caliper piston dust boot seal (2) and on the disc brake pads. If there is any evidence of brake fluid leakage, the brake caliper requires overhaul or replacement.
4. Inspect for smooth and complete travel of the caliper piston, or pistons, into the caliper bore, or bores: The movement of a caliper piston into a caliper bore should be smooth and even. If a caliper piston is frozen or difficult to bottom, the caliper requires overhaul or replacement. For single piston caliper applications, insert a discarded inner brake pad (2) or block of wood in front of the piston. Using a large C-clamp (1) installed over the body of the caliper (3) and against the brake pad or block of wood, slowly bottom the piston in the bore. For dual piston caliper applications, insert a discarded inner brake pad (2) or block of wood in front of the pistons. Using 2 large C-clamps (1) installed over the body of the caliper (3) and against the brake pad or block of wood, slowly bottom the pistons evenly into the bores.

Disc Brake Mounting and Hardware Inspection - Front

1. Inspect the disc brake pad mounting hardware for the following: Missing mounting hardware. Excessive corrosion. Bent mounting tabs. Looseness at the caliper mounting bracket. Looseness at the disc brake pads.
2. If any of the conditions listed are found, the disc brake pad mounting hardware requires replacement.
3. Ensure the disc brake pads are held firmly in place on the caliper mounting bracket, yet slide easily on the mounting hardware without binding.
4. Inspect the caliper slide pins (3) by gently pulling outward, without disengaging the slides from the boots, then pushing inward, and observe for the following: Binding Seizing Looseness Bent or damaged slide pins Cracked or torn slide pin boots (2) Missing slide pin boots Bent or damaged caliper mounting bracket
5. If any of the conditions listed are found, the caliper mounting hardware requires replacement.

Disc Brake Mounting and Hardware Inspection - Rear

1. Inspect the disc brake pad mounting hardware for the following: Missing mounting hardware Excessive corrosion Bent mounting tabs Looseness at the caliper mounting bracket Looseness at the disc brake pads
2. If any of the conditions listed are found, the disc brake pad mounting hardware requires replacement.
3. Ensure the disc brake pads are held firmly in place on the caliper mounting bracket, yet slide easily on the mounting hardware without binding.
4. Inspect the caliper bolts (1) for the following: Binding Seizing Looseness in the caliper mounting bracket (3) Bent or damaged caliper bolts Cracked or torn boots (4) Missing boots Bent or damaged caliper mounting bracket (3)
5. If any of the conditions listed are found, the caliper mounting hardware requires replacement.

Removal Procedure

1. Inspect the fluid level in the brake master cylinder reservoir.
2. If the brake fluid level is midway between the maximum-full point and the minimum allowable level, then no brake fluid needs to be removed from the reservoir before proceeding. If the brake fluid level is higher than midway between the maximum-full point and the minimum allowable level, then remove brake fluid to the midway point before proceeding.
3. Raise and support the vehicle. Refer to «Lifting and Jacking the Vehicle»(/buick/rendezvous/i-2001-2007/remont/hoistjack/#general-information__lifting-and-jacking-the-vehicle) in General Information.
4. Remove the tire and wheel. Refer to «Tire and Wheel Removal and Installation»(/buick/rendezvous/i-2001-2007/remont/wheel-tire-system/#tires-and-wheels) .
5. Install two wheel nuts in order to secure the rotor.
6. Install a C-clamp (2) over the top of the brake caliper and against the back of the outboard brake pad.
7. Tighten the C-clamp (2) until the brake caliper piston pushes into the brake caliper bore enough to slide the brake caliper (1) off of the rotor.
8. Remove the C-clamp from the brake caliper.
9. Remove the lower brake caliper bolt.
10. Rotate the brake caliper upward in order to access the brake pads.
11. Remove the brake pads from the brake caliper bracket.
12. Remove the brake pad retainers from the brake caliper bracket.
13. Install a C-clamp over the brake caliper and against the block of wood or the old brake pad (2).
14. Tighten the C-clamp until the brake caliper piston pushes completely into the brake caliper bore.
15. Remove the C-clamp from the brake caliper.
16. Inspect the brake caliper bolt boots (4) for the following conditions: Cuts Tears Deterioration Replace the brake caliper bolt boots if damage exists. Refer to «Brake Caliper Bracket Replacement - Front»(/buick/rendezvous/i-2001-2007/remont/mechanical-hydraulic/#disc-brake-system) .
17. Inspect the brake caliper piston dust boot (1) for the following conditions: Cuts Tears Leaking Deterioration Replace the brake caliper piston dust boot if damage exists. Refer to «Brake Caliper Overhaul - Front»(/buick/rendezvous/i-2001-2007/remont/mechanical-hydraulic/#disc-brake-system__brake-caliper-overhaul-front) .
18. Inspect the brake caliper bolts for corrosion or damage. If corrosion is found, use new parts, including bushings, when installing the brake caliper. Do not attempt to polish away corrosion.

Installation Procedure

1. If you are installing new brake pads, use a C-clamp in order to compress the piston to the bottom of the caliper bore. Use the old brake pad, a metal plate or a wooden block across the face of the piston in order to protect the piston and the caliper boot.
2. Install the four brake pad retainers to the caliper bracket.
3. Install the brake pads over the brake pad retainers and onto the caliper bracket.
4. Thoroughly clean and apply Threadlocker GM P/N 12345493 (Canadian P/N 10953488) or equivalent to the threads of the brake caliper pin bolts.
5. Pivot the caliper down onto the pads.
6. Install the lower caliper bolt. Tighten: Tighten the caliper bolt to 35 N.m (26 lb ft).
7. Remove the two wheel nuts securing the rotor to the hub and bearing.
8. Install the tire and wheel. Refer to «Tire and Wheel Removal and Installation»(/buick/rendezvous/i-2001-2007/remont/wheel-tire-system/#tires-and-wheels) .
9. Lower the vehicle.
10. Pump the brake pedal (3/4 of a full stroke) as many times as necessary to obtain a firm brake pedal.
11. Fill the master cylinder to the proper level. Refer to «Master Cylinder Reservoir Filling»(/buick/rendezvous/i-2001-2007/remont/mechanical-hydraulic/#hydraulic-brake-system__master-cylinder-reservoir-filling) In Hydraulic Brakes.
12. Burnish the pads and the rotors. Refer to «Burnishing Pads and Rotors»(/buick/rendezvous/i-2001-2007/remont/mechanical-hydraulic/#disc-brake-system__burnishing-pads-and-rotors) .

1. Inspect the fluid level in the brake master cylinder reservoir.
2. If the brake fluid level is midway between the maximum-full point and the minimum allowable level, then no brake fluid needs to be removed from the reservoir before proceeding. If the brake fluid level is higher than midway between the maximum-full point and the minimum allowable level, then remove brake fluid to the midway point before proceeding.
3. Raise and suitably support the vehicle. Refer to «Lifting and Jacking the Vehicle»(/buick/rendezvous/i-2001-2007/remont/hoistjack/#general-information__lifting-and-jacking-the-vehicle) in General Information.
4. Remove the tire and the wheel assembly. Refer to «Tire and Wheel Removal and Installation»(/buick/rendezvous/i-2001-2007/remont/wheel-tire-system/#tires-and-wheels) in Tires and Wheels.
5. Hand tighten two wheel lug nuts in order to retain the rotor to the hub.
6. Compress the rear caliper piston. Install a large C-clamp (3) over the top of the caliper housing (2) and against the back of the outboard pad. Slowly tighten the C-clamp (3) until the piston pushes into the caliper bore enough to slide the caliper (2) off the rotor. Remove the C-clamp from the caliper.
7. Remove the upper caliper bolt (2).
8. In order to access the pads, rotate the caliper downward.
9. Remove the pads (9,10) from the caliper bracket (12).
10. Remove the two retainer slides (11) from the caliper bracket (12).
11. Inspect the following parts for cuts, tears, or deterioration. Replace any damaged parts: The disc brake mounting and hardware - Refer to «Disc Brake Mounting and Hardware Inspection - Rear»(/buick/rendezvous/i-2001-2007/remont/mechanical-hydraulic/#disc-brake-system__disc-brake-mounting-and-hardware-inspection) . The caliper dust boot - Refer to «Brake Caliper Inspection»(/buick/rendezvous/i-2001-2007/remont/mechanical-hydraulic/#disc-brake-system__brake-caliper-inspection) .
12. Inspect the caliper bolts (1) for corrosion or damage. If corrosion is found, use new caliper bolts when installing the caliper.

1. Using a C-clamp, bottom the piston into the caliper bore. Use an old brake pad or wooden block across the face of the piston. Do not damage the piston or the caliper boot.
2. Install the two retainer slides (11) to the caliper bracket.
3. Install the pads (9,10) to the caliper bracket (12).
4. Remove the support and reposition the caliper (15) back down over the front pads.
5. Lubricate the bolt and the bolt boot.
6. Install the upper caliper bolt. Tighten: Tighten the caliper bolt to 45 N.m (33 lb ft).
7. Remove the two wheel lug nuts retaining the rotor to the hub.
8. Install the tire and the wheel assembly. Refer to «Tire and Wheel Removal and Installation»(/buick/rendezvous/i-2001-2007/remont/wheel-tire-system/#tires-and-wheels) in Tires and Wheels.
9. Lower the vehicle.
10. With the engine OFF, gradually apply the brake pedal to approximately 2/3 of its travel distance.
11. Slowly release the brake pedal.
12. Wait 15 seconds, then repeat steps 10 and 11 until a firm brake pedal is obtained. This will properly seat the brake caliper pistons and brake pads.
13. Fill the brake master cylinder reservoir to the proper level. Refer to «Master Cylinder Reservoir Filling»(/buick/rendezvous/i-2001-2007/remont/mechanical-hydraulic/#hydraulic-brake-system__master-cylinder-reservoir-filling) in Hydraulic Brakes.
14. Burnish the pads and rotors. Refer to «Burnishing Pads and Rotors»(/buick/rendezvous/i-2001-2007/remont/mechanical-hydraulic/#disc-brake-system__burnishing-pads-and-rotors) .

Burnishing Pads and Rotors

Burnishing the brake pads and brake rotors is necessary in order to ensure that the braking surfaces are properly prepared after service has been performed on the disc brake system.

This procedure should be performed whenever the disc brake rotors have been refinished or replaced, and/or whenever the disc brake pads have been replaced.

1. Select a smooth road with little or no traffic.
2. Accelerate the vehicle to 48 km/h (30 mph). IMPORTANT: Use care to avoid overheating the brakes while performing this step.
3. Using moderate to firm pressure, apply the brakes to bring the vehicle to a stop. Do not allow the brakes to lock.
4. Repeat steps 2 and 3 until approximately 20 stops have been completed. Allow sufficient cooling periods between stops in order to properly burnish the brake pads and rotors.

1. Inspect the fluid level in the brake master cylinder reservoir.
2. If the brake fluid level is midway between the maximum-full point and the minimum allowable level, then no brake fluid needs to be removed from the reservoir before proceeding. If the brake fluid level is higher than midway between the maximum-full point and the minimum allowable level, then remove brake fluid to the midway point before proceeding.
3. Raise and support the vehicle. Refer to «Lifting and Jacking the Vehicle»(/buick/rendezvous/i-2001-2007/remont/hoistjack/#general-information__lifting-and-jacking-the-vehicle) in General Information.
4. Remove the tire and wheel. Refer to «Tire and Wheel Removal and Installation»(/buick/rendezvous/i-2001-2007/remont/wheel-tire-system/#tires-and-wheels) in Tires and Wheels.
5. Install two wheel lug nuts to retain the rotor to the hub.
6. Install a large C-clamp (2) over the top of the brake caliper and against the back of the outboard brake pad.
7. Tighten the C-clamp until the caliper piston is pushed into the caliper bore enough to slide the caliper off the rotor.
8. Remove the brake hose bolt (1).
9. Remove the brake hose (2) from the brake caliper.
10. Remove and discard the two copper brake hose gaskets (3). These gaskets may be stuck to the brake caliper and/or the brake hose end.
11. Plug the openings in the brake caliper and the brake hose in order to prevent brake fluid loss and contamination.
12. Clean off any dirt or corrosion on the brake caliper near the brake hose fitting.
13. Remove the brake caliper bolts (3).
14. Remove the brake caliper from the brake caliper bracket.
15. Inspect the brake caliper pin boots (4) for the following components: Cuts Tears Deterioration Replace the bolt boots if damage exists. Refer to «Brake Caliper Bracket Replacement - Front»(/buick/rendezvous/i-2001-2007/remont/mechanical-hydraulic/#disc-brake-system) .
16. If the caliper pin boots are damaged, inspect the caliper pins for corrosion or damage. If corrosion is found on the brake caliper pin shaft, replace the brake caliper pin and the brake caliper pin boot. Do not attempt to polish away the corrosion.

1. Ensure that the caliper bolt boots (3) are properly installed.
2. Install the caliper (1) to the caliper bracket (2).
3. Install the brake caliper bolts. Tighten: Tighten the bolts to 54 N.m (40 lb ft).
4. Remove the plugs in the brake hose end.
5. Assemble the brake hose bolt (1) and the NEW copper brake hose gaskets (3) to the brake hose (2).
6. Install the brake hose bolt to the brake caliper. Tighten: Tighten the bolt to 54 N.m (40 lb ft).
7. Remove the nuts securing the rotor to the hub.
8. Install the tire and wheel. Refer to «Tire and Wheel Removal and Installation»(/buick/rendezvous/i-2001-2007/remont/wheel-tire-system/#tires-and-wheels) in Tires and Wheels.
9. Lower the vehicle.
10. Fill the master cylinder to the proper level. Refer to «Master Cylinder Reservoir Filling»(/buick/rendezvous/i-2001-2007/remont/mechanical-hydraulic/#hydraulic-brake-system__master-cylinder-reservoir-filling) in Hydraulic Brakes.
11. Bleed the brake system. Refer to «Hydraulic Brake System Bleeding (Manual)»(/buick/rendezvous/i-2001-2007/remont/mechanical-hydraulic/#hydraulic-brake-system) or «Hydraulic Brake System Bleeding (Pressure)»(/buick/rendezvous/i-2001-2007/remont/mechanical-hydraulic/#hydraulic-brake-system) in Hydraulic Brakes.
12. Apply approximately 778 N.m (175 lb ft) of force to the brake pedal for ten seconds.
13. Inspect the brake caliper and hydraulic brake system for brake fluid leaks.

Note. Refer to Brake Fluid Effects on Paint and Electrical Components Notice in Cautions and Notices.

1. Inspect the fluid level in the brake master cylinder reservoir.
2. If the brake fluid level is midway between the maximum-full point and the minimum allowable level, then no brake fluid needs to be removed from the reservoir before proceeding. If the brake fluid level is higher than midway between the maximum-full point and the minimum allowable level, then remove brake fluid to the midway point before proceeding.
3. Raise and support the vehicle. Refer to «Lifting and Jacking the Vehicle»(/buick/rendezvous/i-2001-2007/remont/hoistjack/#general-information__lifting-and-jacking-the-vehicle) in General Information.
4. Remove the tire and wheel. Refer to «Tire and Wheel Removal and Installation»(/buick/rendezvous/i-2001-2007/remont/wheel-tire-system/#tires-and-wheels) in Tires and Wheels.
5. Install two nuts to retain the rotor to the hub.
6. Install a large C-clamp (3) over the top of the brake caliper and against the back of the outboard brake pad.
7. Tighten the C-clamp until the caliper piston is pushed into the caliper bore enough to slide the caliper off the rotor.
8. Remove the brake hose bolt (1).
9. Remove the brake hose (2) from the brake caliper.
10. Remove and discard the two copper brake hose gaskets (3). These gaskets may be stuck to the brake caliper and/or the brake hose end.
11. Plug the openings in the brake caliper and the brake hose in order to prevent brake fluid loss and contamination.
12. Clean off any dirt or corrosion on the brake caliper near the brake hose fitting.
13. Remove the brake caliper bolts (1,3).
14. Remove the brake caliper (15) from the brake caliper bracket (12).
15. Inspect the caliper bracket bolt boot on the caliper bracket for the following conditions: Cuts Tears Deterioration Replace any damaged caliper bracket bolt boots. Refer to «Disc Brake Hardware Replacement - Rear»(/buick/rendezvous/i-2001-2007/remont/mechanical-hydraulic/#disc-brake-system) .

1. Ensure that the caliper bolt bushings (4) and the caliper bolt boots (3) are properly installed.
2. Install the brake caliper (1) to the brake caliper bracket (2).
3. lubricate the brake caliper bolt shaft. Do not lubricate the threads.
4. lubricate the brake caliper bolt boots (4) in the brake caliper bracket (3).
5. Install the brake caliper bolts. Tighten: Tighten the brake caliper bolts to 45 N.m (33 lb ft).
6. Use a flat-bladed tool in order to install the brake caliper bracket boot over the shoulder of the brake caliper bolt.
7. Remove the plugs in the brake hose end.
8. Assemble the brake hose bolt (1) and the NEW copper brake hose gaskets (3) to the brake hose (2).
9. Install the brake hose bolt to the brake caliper. Refer to «Brake Hose Replacement - Rear (Disc Brake)»(/buick/rendezvous/i-2001-2007/remont/mechanical-hydraulic/#hydraulic-brake-system) or «Brake Hose Replacement - Rear (Drum Brake)»(/buick/rendezvous/i-2001-2007/remont/mechanical-hydraulic/#hydraulic-brake-system) in Hydraulic Brakes.
10. Remove the nuts securing the rotor to the hub.
11. Install the tire and wheel. Refer to «Tire and Wheel Removal and Installation»(/buick/rendezvous/i-2001-2007/remont/wheel-tire-system/#tires-and-wheels) in Tires and Wheels.
12. Lower the vehicle.
13. Fill the master cylinder to the proper level. Refer to «Master Cylinder Reservoir Filling»(/buick/rendezvous/i-2001-2007/remont/mechanical-hydraulic/#hydraulic-brake-system__master-cylinder-reservoir-filling) in Hydraulic Brakes.
14. Bleed the brake system. Refer to «Hydraulic Brake System Bleeding (Manual)»(/buick/rendezvous/i-2001-2007/remont/mechanical-hydraulic/#hydraulic-brake-system) or «Hydraulic Brake System Bleeding (Pressure)»(/buick/rendezvous/i-2001-2007/remont/mechanical-hydraulic/#hydraulic-brake-system) in Hydraulic Brakes.
15. Apply approximately 778 N.m (175 lb ft) of force to the brake pedal for ten seconds.
16. Inspect the brake caliper and hydraulic brake system for brake fluid leaks.

Brake Caliper Overhaul - Front

Note. Refer to Brake Fluid Effects on Paint and Electrical Components Notice in Cautions and Notices.

Tools Required

J 36349 Dust Boot Seal Installer

Overhaul Procedure

Disassembly Procedure

1. Inspect the fluid level in the brake master cylinder reservoir.
2. If the brake fluid level is midway between the maximum-full point and the minimum allowable level, then no brake fluid needs to be removed from the reservoir before proceeding. If the brake fluid level is higher than midway between the maximum-full point and the minimum allowable level, then remove brake fluid to the midway point before proceeding.
3. Remove the brake caliper. Refer to «Brake Caliper Replacement - Front»(/buick/rendezvous/i-2001-2007/remont/mechanical-hydraulic/#disc-brake-system) .
4. Blow compressed air into the brake caliper (1) hose hole in order to remove the brake caliper piston. The piston will come out through the piston boot.
5. Inspect and replace the brake caliper piston if any of the following conditions are found: Scoring Nicks Corrosion Worn or damaged chrome plating
6. Remove the piston seal (4) from the groove in the caliper bore (3). Use a small wooden or plastic tool.
7. Inspect the caliper bore (3) and the seal grooves for the following conditions: Scoring Nicks Corrosion Wear
8. Use a piece of crocus cloth in order to polish out light corrosion.
9. Replace the caliper (3) if corrosion in and around the seal groove cannot be cleaned with a piece of crocus cloth.
10. Inspect and replace any brake caliper bolt boots (4) that exhibit any of the following conditions: Cuts Tears Deterioration
11. Inspect the caliper bolts for corrosion or damage. If corrosion is found on the brake caliper bolt shaft, replace the brake caliper bolt (1) and the brake caliper bolt boot (4). Do not attempt to polish away the corrosion.
12. Inspect the seal groove in the caliper bore for nicks or burrs. Replace the caliper if the seal groove is damaged.
13. Remove the bleeder valve cap (1) and the bleeder valve (2) from the brake caliper housing (3).
14. Clean all the parts with clean, denatured alcohol.
15. Dry all the parts with filtered, non-lubricated compressed air.
16. Use filtered, non-lubricated compressed air in order to blow out all of the passages in the caliper housing and the bleeder valve.

Assembly Procedure

1. Install the bleeder valve and the bleeder valve cap to the caliper housing.
2. Install a new lubricated piston seal (4) to the caliper bore grooves. Ensure that the piston seal is not twisted.
3. Install the lubricated boot (1) onto the brake caliper piston (2).
4. Lubricate the brake caliper piston (2) with clean brake fluid.
5. Install the brake caliper piston and the brake caliper piston boot into the bore of the caliper. Push the brake caliper piston to the bottom of the bore.
6. Seat the caliper boot in the caliper housing counterbore using the J 36349 .
7. Install the caliper. Refer to «Brake Caliper Replacement - Front»(/buick/rendezvous/i-2001-2007/remont/mechanical-hydraulic/#disc-brake-system) .

1. Remove the rear brake caliper from the vehicle. Refer to «Brake Caliper Replacement - Rear»(/buick/rendezvous/i-2001-2007/remont/mechanical-hydraulic/#disc-brake-system) .
2. Remove the brake caliper piston from the caliper bore by directing low pressure compressed air into the caliper bore through the fluid inlet hole.
3. Remove the retaining ring that secures the dust boot to the caliper housing.
4. Remove the piston dust boot seal (2) from the seal counterbore in the caliper. Discard the boot seal.
5. Using a small wooden or plastic tool, remove the piston seal (4) from the caliper bore. Discard the piston seal.
6. Clean the brake caliper piston bore and seal counterbore, and the caliper piston with denatured alcohol, or equivalent.
7. Dry the caliper piston bore and counterbore, and the piston with non-lubricated, filtered air.
8. Inspect the caliper bore for cracks, scoring, pitting, excessive rust, and/or excessive corrosion.
9. If light rust or light corrosion are present in the caliper bore, attempt to remove the imperfection with a fine emery paper. If the imperfection cannot be removed, replace the caliper assembly.
10. If cracks, scoring, pitting, excessive rust, and/or excessive corrosion are present in the caliper bore, replace the caliper assembly.
11. Inspect the caliper piston for cracks, scoring, and/or damage to the chrome plating. Replace the caliper piston if any of these conditions exist.

1. Lubricate the new piston seal (4) with Delco Supreme 11®, GM P/N 12377967 (Canadian P/N 992667), or equivalent DOT-3 brake fluid from a clean, sealed brake fluid container.
2. Install the lubricated, new piston seal (4) into the caliper bore.
3. Apply a thin coat of Delco Supreme 11®, GM P/N 12377967 (Canadian P/N 992667), or equivalent DOT-3 brake fluid from a clean, sealed brake fluid container onto the outer surface area of the caliper piston (3).
4. Install the bottom half of the caliper piston (2) into the caliper bore.
5. Install the new piston dust boot seal (1) over the caliper piston (2).
6. Compress the caliper piston (2) to the bottom of the caliper bore.
7. Fully seat the piston dust boot seal (1) into caliper counterbore.
8. Install the retaining ring that secures the dust boot to the caliper housing.
9. Install the bleeder valve and cap to the caliper and tighten the valve securely.
10. Install the rear brake caliper to the vehicle. Refer to «Brake Caliper Replacement - Rear»(/buick/rendezvous/i-2001-2007/remont/mechanical-hydraulic/#disc-brake-system) .

1. Inspect the fluid level in the brake master cylinder reservoir.
2. If the brake fluid level is midway between the maximum-full point and the minimum allowable level, then no brake fluid needs to be removed from the reservoir before proceeding. If the brake fluid level is higher than midway between the maximum-full point and the minimum allowable level, then remove brake fluid to the midway point before proceeding.
3. Raise and support the vehicle. Refer to «Lifting and Jacking the Vehicle»(/buick/rendezvous/i-2001-2007/remont/hoistjack/#general-information__lifting-and-jacking-the-vehicle) in General Information.
4. Remove the tire and wheel. Refer to «Tire and Wheel Removal and Installation»(/buick/rendezvous/i-2001-2007/remont/wheel-tire-system/#tires-and-wheels) .
5. Using a C-clamp installed to the center of the outer disc brake pad and the back of the caliper, slowly compress the caliper piston into its bore just enough to remove the caliper from the mounting bracket.
6. Remove the disc brake caliper bolts.
7. Remove the disc brake caliper from the mounting bracket.
8. Remove the disc brake pads from the disc brake caliper bracket.
9. Remove the disc brake pad retainers from the disc brake caliper bracket.
10. Remove the caliper pins (5) from the disc brake caliper mounting bracket (3).
11. Remove the caliper pin boots (4) from the disc brake caliper mounting bracket.
12. Lightly wire brush all brake pad contact areas in order to remove any corrosion.

1. Lubricate the inner diameter of the caliper pin boot (4) and install to the caliper mounting bracket (3).
2. Lubricate the outer diameter of the caliper pins (5) and install to the caliper mounting bracket (3).
3. Install the disc brake pad retainers to the disc brake caliper bracket.
4. Install the disc brake pads to the disc brake caliper bracket.
5. Install the disc brake caliper to the mounting bracket.
6. Install the disc brake caliper bolts. Tighten: Tighten the disc brake caliper bolts to 35 N.m (26 lb ft).
7. Install the tire and wheel. Refer to «Tire and Wheel Removal and Installation»(/buick/rendezvous/i-2001-2007/remont/wheel-tire-system/#tires-and-wheels) in Tires and Wheels.
8. Lower the vehicle.
9. Apply and release the brake pedal (3/4 stroke) as many times as necessary in order to obtain a firm brake pedal.
10. Fill the master cylinder to the proper level. Refer to «Master Cylinder Reservoir Filling»(/buick/rendezvous/i-2001-2007/remont/mechanical-hydraulic/#hydraulic-brake-system__master-cylinder-reservoir-filling) in Hydraulic Brakes.

1. Remove the brake caliper from the mounting bracket and support the brake caliper (2) with heavy mechanic's wire (1), or equivalent. It is not necessary to disconnect the hydraulic brake flexible hose from the caliper. Refer to «Brake Caliper Replacement - Rear»(/buick/rendezvous/i-2001-2007/remont/mechanical-hydraulic/#disc-brake-system) .
2. Remove the brake pads (2) from the brake caliper bracket (1).
3. Remove the brake pad retainers (1) from the brake caliper bracket (3).
4. Remove the brake caliper bracket (3). Refer to «Brake Caliper Bracket Replacement - Rear»(/buick/rendezvous/i-2001-2007/remont/mechanical-hydraulic/#disc-brake-system) .
5. Mount the brake caliper bracket (3) in a vise.

1. Clean all parts in clean, denatured alcohol.
2. Dry with low pressure, non-lubricated, filtered air.
3. Inspect the brake caliper bracket for cracks. If cracked, replace bracket.
4. Lubricate the brake caliper pin bolt sleeves with high temperature silicone lubricant.
5. Install the brake caliper bracket. Refer to «Brake Caliper Bracket Replacement - Rear»(/buick/rendezvous/i-2001-2007/remont/mechanical-hydraulic/#disc-brake-system) .
6. Install the brake pad retainers (1) to the bracket caliper bracket (3).
7. Install the brake pads (2) to the bracket caliper bracket (3).
8. Install the brake caliper to the brake caliper bracket. Refer to «Brake Caliper Replacement - Rear»(/buick/rendezvous/i-2001-2007/remont/mechanical-hydraulic/#disc-brake-system) .

1. Remove the caliper from the mounting bracket and support the caliper with heavy mechanic's wire, or equivalent. It is not necessary to disconnect the hydraulic brake flexible hose from the caliper. Refer to «Brake Caliper Replacement - Front»(/buick/rendezvous/i-2001-2007/remont/mechanical-hydraulic/#disc-brake-system) .
2. Remove the front brake pads.
3. Remove the caliper bracket bolts (2).
4. Remove the caliper bracket (1).

1. Clean and visually inspect the threads of the caliper bracket bolts (2) and mounting holes in the knuckle.
2. Apply threadlocker, GM P/N 12345493 (Canadian P/N 10953488), or equivalent, to the threads of the brake caliper bracket bolts (2).
3. Install the caliper bracket (1) with the bracket bolts (2). Tighten: Tighten the caliper bracket bolts to 185 N.m (137 lb ft).
4. Install the front brake pads.
5. Install the caliper. Refer to «Brake Caliper Replacement - Front»(/buick/rendezvous/i-2001-2007/remont/mechanical-hydraulic/#disc-brake-system) .

1. Remove the caliper from the mounting bracket and support the caliper with heavy mechanic's wire, or equivalent. It is not necessary to disconnect the hydraulic brake flexible hose from the caliper. Refer to «Brake Caliper Replacement - Rear»(/buick/rendezvous/i-2001-2007/remont/mechanical-hydraulic/#disc-brake-system) .
2. Remove the rear brake pads.
3. Remove the caliper bracket bolts (2).
4. Remove the caliper bracket (1).

1. Clean and visually inspect the threads of the caliper bracket bolts (2) and mounting holes in the knuckle.
2. Apply threadlocker, GM P/N 12345493 (Canadian P/N 10953488), or equivalent, to the threads of the brake caliper bracket bolts (2).
3. Install the caliper bracket (1) with the bracket bolts (2). Tighten: Tighten the caliper bracket bolts to 130 N.m (96 lb ft).
4. Install the rear brake pads.
5. Install the caliper. Refer to «Brake Caliper Replacement - Rear»(/buick/rendezvous/i-2001-2007/remont/mechanical-hydraulic/#disc-brake-system) .

Brake Rotor Replacement - Front

Tools Required

1. J 41013 Rotor/Drum Flange Resurfacing Kit. See «Special Tools and Equipment»(/buick/rendezvous/i-2001-2007/remont/mechanical-hydraulic/#disc-brake-system) .
2. J 42450-A Wheel Hub/Flange Resurfacing Kit. See «Special Tools and Equipment»(/buick/rendezvous/i-2001-2007/remont/mechanical-hydraulic/#disc-brake-system) .

1. Raise and suitably support the vehicle. Refer to «Lifting and Jacking the Vehicle»(/buick/rendezvous/i-2001-2007/remont/hoistjack/#general-information__lifting-and-jacking-the-vehicle) in General Information.
2. Remove the tire and wheel assembly. Refer to «Tire and Wheel Removal and Installation»(/buick/rendezvous/i-2001-2007/remont/wheel-tire-system/#tires-and-wheels) in Tires and Wheels.
3. Remove and support the caliper and bracket as an assembly with heavy mechanics wire. DO NOT disconnect the hydraulic flexible brake hose. Refer to «Brake Caliper Bracket Replacement - Front»(/buick/rendezvous/i-2001-2007/remont/mechanical-hydraulic/#disc-brake-system) .
4. Remove the brake rotor.
5. If the brake rotor is to be reinstalled to the vehicle, use the J 41013 in order to clean any rust or corrosion from the hub/axle flange mating surface of the brake rotor. See «Special Tools and Equipment»(/buick/rendezvous/i-2001-2007/remont/mechanical-hydraulic/#disc-brake-system) .
6. Use the J 42450-A in order to clean the wheel hub flange. See «Special Tools and Equipment»(/buick/rendezvous/i-2001-2007/remont/mechanical-hydraulic/#disc-brake-system) .

1. Install the brake rotor.
2. Install the caliper bracket. Refer to «Brake Caliper Bracket Replacement - Front»(/buick/rendezvous/i-2001-2007/remont/mechanical-hydraulic/#disc-brake-system) .
3. Install the tire and the wheel. Refer to «Tire and Wheel Removal and Installation»(/buick/rendezvous/i-2001-2007/remont/wheel-tire-system/#tires-and-wheels) in Tires and Wheels.
4. Lower the vehicle.

Brake Rotor Replacement - Rear

Tools Required

1. J 41013 Rotor/Drum Flange Resurfacing Kit. See «Special Tools and Equipment»(/buick/rendezvous/i-2001-2007/remont/mechanical-hydraulic/#disc-brake-system) .
2. J 42450-A Wheel Hub/Flange Resurfacing Kit. See «Special Tools and Equipment»(/buick/rendezvous/i-2001-2007/remont/mechanical-hydraulic/#disc-brake-system) .

1. Raise and suitably support the vehicle. Refer to «Lifting and Jacking the Vehicle»(/buick/rendezvous/i-2001-2007/remont/hoistjack/#general-information__lifting-and-jacking-the-vehicle) in General Information.
2. Remove the tire and wheel assembly. Refer to «Tire and Wheel Removal and Installation»(/buick/rendezvous/i-2001-2007/remont/wheel-tire-system/#tires-and-wheels) in Tires and Wheels.
3. Remove and support the caliper and bracket as an assembly with heavy mechanics wire. DO NOT disconnect the hydraulic flexible brake hose. Refer to «Brake Caliper Replacement - Rear»(/buick/rendezvous/i-2001-2007/remont/mechanical-hydraulic/#disc-brake-system) .
4. Remove the brake rotor.
5. If the brake rotor is to be reinstalled to the vehicle, use the J 41013 in order to clean any rust or corrosion from the hub/axle flange mating surface of the brake rotor. See «Special Tools and Equipment»(/buick/rendezvous/i-2001-2007/remont/mechanical-hydraulic/#disc-brake-system) .
6. Use the J 42450-A in order to clean the wheel hub flange. See «Special Tools and Equipment»(/buick/rendezvous/i-2001-2007/remont/mechanical-hydraulic/#disc-brake-system) .

1. Install the brake rotor.
2. Install the caliper bracket. Refer to «Brake Caliper Replacement - Rear»(/buick/rendezvous/i-2001-2007/remont/mechanical-hydraulic/#disc-brake-system) .
3. Install the tire and the wheel. Refer to «Tire and Wheel Removal and Installation»(/buick/rendezvous/i-2001-2007/remont/wheel-tire-system/#tires-and-wheels) in Tires and Wheels.
4. Lower the vehicle.

Brake Rotor Assembled Lateral Runout (LRO) Correction

Review the following acceptable methods for bringing the brake rotor assembled LRO to within specifications. Determine which method to use for the specific vehicle being repaired.

1. The indexing method of correcting assembled LRO is most effective when the LRO specification is only exceeded by a relatively small amount: 0.025-0.127 mm (0.001-0.005 in). Indexing is used to achieve the best possible match of high spots to low spots between related components. Refer to «Brake Rotor Assembled Lateral Runout (LRO) Correction - Indexing»(/buick/rendezvous/i-2001-2007/remont/mechanical-hydraulic/#disc-brake-system__brake-rotor-assembled-lateral-runout-lro) .
2. The correction plate method of correcting assembled LRO involves the addition of a tapered plate between the brake rotor and the hub/axle flange. The correction plate method can be used to correct LRO that exceeds the specification by up to 0.23 mm (0.009 in). Refer to «Brake Rotor Assembled Lateral Runout (LRO) Correction - Correction Plates»(/buick/rendezvous/i-2001-2007/remont/mechanical-hydraulic/#disc-brake-system__brake-rotor-assembled-lateral-runout-lro) .
3. The on-vehicle brake lathe method is used to bring the LRO to within specifications through compensating for LRO while refinishing the brake rotor. Refer to «Brake Rotor Assembled Lateral Runout (LRO) Correction - On-Vehicle Lathe»(/buick/rendezvous/i-2001-2007/remont/mechanical-hydraulic/#disc-brake-system) .

If the assembled LRO cannot be corrected using these methods, then other components must be suspected as causing and/or contributing to the LRO concern.

Brake Rotor Assembled Lateral Runout (LRO) Correction - Indexing

Tools Required

1. J 39544-KIT Torque-Limiting Socket Set, or equivalent. See «Special Tools and Equipment»(/buick/rendezvous/i-2001-2007/remont/mechanical-hydraulic/#disc-brake-system) .
2. J 45101-100 Conical Brake Rotor Washers. See «Special Tools and Equipment»(/buick/rendezvous/i-2001-2007/remont/mechanical-hydraulic/#disc-brake-system) .

Scheme 8

1. Remove the J 45101-100 and the lug nuts that were installed during the assembled LRO measurement procedure. See «Special Tools and Equipment»(/buick/rendezvous/i-2001-2007/remont/mechanical-hydraulic/#disc-brake-system) .
2. Inspect the mating surface of the hub/axle flange and the brake rotor to ensure that there are no foreign particles or debris remaining.
3. Index the brake rotor in a different orientation to the hub/axle flange.
4. Hold the rotor firmly in place against the hub/axle flange and install one of the J 45101-100 (1) and one lug nut (2) onto the upper-most wheel stud. See «Special Tools and Equipment»(/buick/rendezvous/i-2001-2007/remont/mechanical-hydraulic/#disc-brake-system) .
5. Continue to hold the rotor secure and tighten the lug nut firmly by hand.
6. Install the remaining J 45101-100 and lug nuts onto the wheel studs and tighten the nuts firmly by hand in a star-pattern. See «Special Tools and Equipment»(/buick/rendezvous/i-2001-2007/remont/mechanical-hydraulic/#disc-brake-system) .
7. Using the J 39544-KIT , or equivalent, tighten the lug nuts in a star-pattern to specification, in order to properly secure the rotor. See «Special Tools and Equipment»(/buick/rendezvous/i-2001-2007/remont/mechanical-hydraulic/#disc-brake-system) . Refer to «Tire and Wheel Removal and Installation»(/buick/rendezvous/i-2001-2007/remont/wheel-tire-system/#tires-and-wheels) in Tires and Wheels.
8. Measure the assembled LRO of the brake rotor. Refer to «Brake Rotor Assembled Lateral Runout (LRO) Measurement»(/buick/rendezvous/i-2001-2007/remont/mechanical-hydraulic/#disc-brake-system__brake-rotor-assembled-lateral-runout-lro) .
9. Compare the amount of change between this measurement and the original measurement.
10. If this measurement is within specifications, proceed to step 14.
11. If this measurement still exceeds specifications, repeat steps 1-9 until the best assembled LRO measurement is obtained.
12. Matchmark the final location of the rotor to the wheel studs if the orientation is different than it was originally.
13. If the brake rotor assembled LRO measurement still exceeds the maximum allowable specification, refer to «Brake Rotor Assembled Lateral Runout (LRO) Correction»(/buick/rendezvous/i-2001-2007/remont/mechanical-hydraulic/#disc-brake-system__brake-rotor-assembled-lateral-runout-lro) .
14. If the brake rotor assembled LRO is within specification, install the brake caliper and depress the brake pedal several times to secure the rotor in place before removing the J 45101-100 and the lug nuts. See «Special Tools and Equipment»(/buick/rendezvous/i-2001-2007/remont/mechanical-hydraulic/#disc-brake-system) .

Brake Rotor Assembled Lateral Runout (LRO) Correction - Correction Plates

Tools Required

1. J 39544-KIT Torque-Limiting Socket Set, or equivalent. See «Special Tools and Equipment»(/buick/rendezvous/i-2001-2007/remont/mechanical-hydraulic/#disc-brake-system) .
2. J 45101-100 Conical Brake Rotor Washers. See «Special Tools and Equipment»(/buick/rendezvous/i-2001-2007/remont/mechanical-hydraulic/#disc-brake-system) .

1. Rotate the brake rotor to position the high spot, identified and marked during the brake rotor assembled LRO measurement procedure, to face upward.
2. Remove the J 45101-100 and the lug nuts that were installed during the assembled LRO measurement procedure and/or the indexing correction procedure. See «Special Tools and Equipment»(/buick/rendezvous/i-2001-2007/remont/mechanical-hydraulic/#disc-brake-system) .
3. Inspect the mounting surface of the hub/axle flange and the brake rotor to ensure that there are no foreign particles or debris remaining.
4. Select the correction plate, following the manufacturer's instructions, which has a specification closest to the assembled LRO measurement. For example: If the assembled LRO measurement was 0.076 mm (0.003 in), the 0.076 mm (0.003 in) correction plate would be used. If the measurement was 0.127 mm (0.005 in), the 0.152 mm (0.006 in) correction plate would be used.
5. Determine the positioning for the correction plate (1) using the high spot mark (3) made during the brake rotor assembled LRO measurement procedure.
6. Install the correction plate (1) onto the hub/axle flange, with the V-shaped notch (2) orientated to align with the high spot mark (3), that was positioned to face upward.
7. Install the brake rotor to the hub/axle flange. Use the matchmark made prior to removal for proper orientation to the flange.
8. Hold the rotor firmly in place against the hub/axle flange and install one of the J 45101-100 (1) and one lug nut (2) onto the upper-most wheel stud. See «Special Tools and Equipment»(/buick/rendezvous/i-2001-2007/remont/mechanical-hydraulic/#disc-brake-system) .
9. Continue to hold the rotor secure and tighten the lug nut firmly by hand.
10. Install the remaining J 45101-100 and lug nuts onto the wheel studs and tighten the nuts firmly by hand in a star-pattern. See «Special Tools and Equipment»(/buick/rendezvous/i-2001-2007/remont/mechanical-hydraulic/#disc-brake-system) .
11. Using the J 39544-KIT , or equivalent, tighten the lug nuts in a star-pattern to specification, in order to properly secure the rotor. See «Special Tools and Equipment»(/buick/rendezvous/i-2001-2007/remont/mechanical-hydraulic/#disc-brake-system) . Refer to «Tire and Wheel Removal and Installation»(/buick/rendezvous/i-2001-2007/remont/wheel-tire-system/#tires-and-wheels) in Tires and Wheels.
12. Measure the assembled LRO of the brake rotor. Refer to «Brake Rotor Assembled Lateral Runout (LRO) Measurement»(/buick/rendezvous/i-2001-2007/remont/mechanical-hydraulic/#disc-brake-system__brake-rotor-assembled-lateral-runout-lro) .
13. If the brake rotor assembled LRO measurement still exceeds the maximum allowable specification, refer to «Brake Rotor Assembled Lateral Runout (LRO) Correction»(/buick/rendezvous/i-2001-2007/remont/mechanical-hydraulic/#disc-brake-system__brake-rotor-assembled-lateral-runout-lro) .
14. If the brake rotor assembled LRO measurement is within specification, install the brake caliper and depress the brake pedal several times to secure the rotor in place before removing the J 45101-100 and the lug nuts. See «Special Tools and Equipment»(/buick/rendezvous/i-2001-2007/remont/mechanical-hydraulic/#disc-brake-system) .

J 45101-100 Conical Brake Rotor Washers. See Special Tools and Equipment .

Correction Procedure

1. Ensure that the caliper and caliper bracket that are already being supported, are clear from contacting any rotating components, such as the brake rotor.
2. Remove the J 45101-100 and the lug nuts that were installed during the assembled LRO measurement procedure and/or the indexing correction procedure. See «Special Tools and Equipment»(/buick/rendezvous/i-2001-2007/remont/mechanical-hydraulic/#disc-brake-system) .
3. Inspect the mounting surface of the hub/axle flange and the brake rotor to ensure that there are no foreign particles or debris remaining.
4. Set up the lathe, following the manufacturer's instructions.
5. Refinish the brake rotor, following the brake lathe manufacturer's instructions.
6. After each successive cut, inspect the brake rotor thickness. Refer to «Brake Rotor Thickness Measurement»(/buick/rendezvous/i-2001-2007/remont/mechanical-hydraulic/#disc-brake-system__brake-rotor-thickness-measurement) .
7. If at any time the brake rotor exceeds the minimum allowable thickness after refinish specification, the brake rotor must be replaced. After replacing the rotor, proceed to step 10.
8. After refinishing the brake rotor, use the following procedure in order to obtain the desired non-directional finish: Follow the brake lathe manufacturer's recommended speed setting for applying a non-directional finish Using moderate pressure, apply the non-directional finish: If the lathe is equipped with a non-directional finishing tool, apply the finish with 120 grit aluminum oxide sandpaper If the lathe is not equipped with a non-directional finishing tool, apply the finish with a sanding block and 150 grit aluminum oxide sandpaper After applying a non-directional finish, clean each friction surface of the brake rotor with denatured alcohol, or an equivalent approved brake cleaner
9. Remove the lathe from the vehicle.
10. Measure the assembled LRO of the brake rotor. Refer to «Brake Rotor Assembled Lateral Runout (LRO) Measurement»(/buick/rendezvous/i-2001-2007/remont/mechanical-hydraulic/#disc-brake-system__brake-rotor-assembled-lateral-runout-lro) .
11. If the brake rotor assembled LRO measurement still exceeds the maximum allowable specification, refer to «Brake Rotor Assembled Lateral Runout (LRO) Correction»(/buick/rendezvous/i-2001-2007/remont/mechanical-hydraulic/#disc-brake-system__brake-rotor-assembled-lateral-runout-lro) .
12. If the brake rotor assembled LRO is within specification, install the brake caliper and depress the brake pedal several times to secure the rotor in place before removing the J 45101-100 and the lug nuts. See «Special Tools and Equipment»(/buick/rendezvous/i-2001-2007/remont/mechanical-hydraulic/#disc-brake-system) .

Brake Rotor Refinishing

Tools Required

1. J 41013 Rotor Resurfacing Kit. See «Special Tools and Equipment»(/buick/rendezvous/i-2001-2007/remont/mechanical-hydraulic/#disc-brake-system) .
2. J 42450-A Wheel Hub Resurfacing Kit. See «Special Tools and Equipment»(/buick/rendezvous/i-2001-2007/remont/mechanical-hydraulic/#disc-brake-system) .

1. Using the J 42450-A , thoroughly clean any rust or corrosion from the mating surface of the hub/axle flange. See «Special Tools and Equipment»(/buick/rendezvous/i-2001-2007/remont/mechanical-hydraulic/#disc-brake-system) .
2. Using the J 41013 , thoroughly clean any rust or corrosion from the mating surface and mounting surface of the brake rotor. See «Special Tools and Equipment»(/buick/rendezvous/i-2001-2007/remont/mechanical-hydraulic/#disc-brake-system) .
3. Inspect the mating surfaces of the hub/axle flange and the rotor to ensure that there are no foreign particles or debris remaining.
4. Mount the brake rotor to the brake lathe according to the lathe manufacturer's instructions, ensuring that all mounting attachments and adapters are clean and free of debris.
5. Ensure that any vibration dampening attachments are securely in place.
6. With the brake lathe running, slowly bring in the cutting tools until they just contact the brake rotor friction surfaces.
7. Observe the witness mark on the brake rotor. If the witness mark extends approximately three-quarters or more of the way around the brake rotor friction surface on each side, the brake rotor is properly mounted to the lathe.
8. If the witness mark does not extend three-quarters or more of the way around the brake rotor, re-mount the rotor to the lathe.
9. Following the brake lathe manufacturer's instructions, refinish the brake rotor.
10. After each successive cut, inspect the brake rotor thickness. Refer to «Brake Rotor Thickness Measurement»(/buick/rendezvous/i-2001-2007/remont/mechanical-hydraulic/#disc-brake-system__brake-rotor-thickness-measurement) .
11. If at any time the brake rotor exceeds the minimum allowable thickness after refinish specification, the brake rotor must be replaced.
12. After refinishing the brake rotor, use the following procedure in order to obtain the desired non-directional finish: Follow the brake lathe manufacturer's recommended speed setting for applying a non-directional finish Using moderate pressure, apply the non-directional finish: If the lathe is equipped with a non-directional finishing tool, apply the finish with 120 grit aluminum oxide sandpaper If the lathe is not equipped with a non-directional finishing tool, apply the finish with a sanding block and 150 grit aluminum oxide sandpaper After applying a non-directional finish, clean each friction surface of the brake rotor with denatured alcohol, or an equivalent approved brake cleaner
13. Remove the brake rotor from the brake lathe.
14. Measure the assembled lateral runout (LRO) of the brake rotor to ensure optimum performance of the disc brakes. Refer to «Brake Rotor Assembled Lateral Runout (LRO) Measurement»(/buick/rendezvous/i-2001-2007/remont/mechanical-hydraulic/#disc-brake-system__brake-rotor-assembled-lateral-runout-lro) .
15. If the brake rotor assembled LRO measurement exceeds the specification, bring the LRO to within specifications. Refer to «Brake Rotor Assembled Lateral Runout (LRO) Correction»(/buick/rendezvous/i-2001-2007/remont/mechanical-hydraulic/#disc-brake-system__brake-rotor-assembled-lateral-runout-lro) .

System Component Description

The disc brake system consists of the following components

System Operation

Mechanical output force is applied from the hydraulic brake caliper pistons to the inner brake pads. As the pistons press the inner brake pads outward, the caliper housings draw the outer brake pads inward. This allows the output force to be equally distributed. The brake pads apply the output force to the friction surfaces on both sides of the brake rotors, which slows the rotation of the tire and wheel assemblies. The correct function of both the brake pad and brake caliper hardware is essential for even distribution of braking force.

Special Tools

Special Tools Illustration Tool Number/Description J 36349 Dust Boot Seal Installer J 39544-KIT Torque Limiting Socket Set J 41013 Rotor Resurfacing Kit J 42450-A Wheel Hub Resurfacing Kit J 45101 Hub and Wheel Runout Gage J 45101-100 Conical Brake Rotor Washers

Scheme 9

Scheme 10

Scheme 11

Scheme 12

Scheme 13

See also:
• Diagnostic Starting Point - Hydraulic Brakes
• Brake Dust Caution
• Tire and Wheel Removal and Installation
• Brake Fluid Irritant Caution
• Lifting and Jacking the Vehicle
• Fastener Notice
• Master Cylinder Reservoir Filling
• Hydraulic Brake System Bleeding (Manual)
• Brake Fluid Effects on Paint and Electrical Components Notice
• Brake Pads Replacement - Front
• Brake Rotor Thickness Variation Measurement
• Brake Rotor Replacement - Front
• Brake Rotor Replacement - Rear
• Brake Rotor Refinishing
• Brake Rotor Assembled Lateral Runout (LRO) Correction
• Brake Caliper Overhaul - Front
• Burnishing Pads and Rotors
• Disc Brake Mounting and Hardware Inspection - Rear
• Brake Caliper Inspection
• Brake Rotor Thickness Measurement