This ones for front brake pulsation (judder) like when you hit the brakes at freeway speeds and the pedal/steering wheel shimmy.
June 7, 2004
2003-2004 MURANO; BRAKE JUDDER FROM FRONT BRAKES
2003 - 2004 Murano (Z50)
2003 Murano, all VIN's
2004 Murano, built before JN8AZ08T(*)4W 208518, or JN8AZ08W(*)4W 314242
Built before December 10, 2003
IF YOU CONFIRM:
While braking, especially during hard braking:
^ A steering wheel shake,
^ Body vibration, or
^ Brake pedal pulsation (also known as "brake judder").
^ "Turn" the front brake rotors using an On-Car Brake Lathe.
^ Install the new front brake pads and hardware kit (see Parts Information).
^ Burnish the brake pads.
Turn the Front Brake Rotors
1. Remove both front brake caliper assemblies.
^ Refer to the Electronic Service Manual (ESM), section BR for brake caliper assembly removal.
2. Inspect the rotors to make sure they are serviceable (they can be reused/resurfacing is possible).
^ Refer to the ESM, section BR, for rotor inspection.
Minimum Thickness: 26.0 mm (1.024 in.)
IMPORTANT: If new rotors are required, "index" them to the hub (see "Rotor Indexing").
3. Resurface both front rotors using an On-Car Brake Lathe.
IMPORTANT NOTES: ^ You must use an on-car brake lathe (such as the ProCut(TM) PFM9.0 or equivalent). This is a required essential tool and must be used to perform warranty brake rotor surfacing.
^ The ProCut(TM) PFM9.0 can be ordered from TECH-MATE.
^ The on-car brake lathe is more effective in reducing brake rotor run out than the conventional off-car lathe method.
^ When using the on-car brake lathe, prevent metal shavings from contacting or collecting on the ABS speed sensors.
^ Remove any shavings that stick to the ABS speed sensor's magnet. It is best to clean the ABS sensor with the rotor removed.
^ If the rotor must be removed for any reason, mark the exact location (rotor to axle hub) before removing the rotor (see Figure
6). This will make sure you reinstall the rotor back to the same location.
^ Do not tighten the wheel lug nuts with an air impact driver.
^ Tighten the wheel lug nuts to the proper torque specification. Uneven or high torque applied to the lugs may distort the brake rotor and hub. This may result in increased rotor runout and excessive rotor thickness variation as the rotor wears.
4. After the rotors have been resurfaced:
^ Recheck the rotor thickness. Specification: 26.0 mm (1.024 in.) minimum thickness.
^ Check the rotor runout. Specification: 0.03 mm (0.001 in) maximum runout.
NOTE: Runout specification is new, and is slightly less than what is shown in the ESM.
5. Reinstall the brake caliper assemblies.
^ Refer to the ESM for brake caliper installation instructions.
Install New Front Pads and Hardware Kit
6. Replace the brake pads and hardware with the new ones listed in the Parts Information (see Figure 4).
^ Make sure the spring retainers and caliper slide pins are installed correctly (refer to the instructions supplied with the new brake pad kit).
^ Refer to the ESM for brake pad and hardware kit replacement instructions.
^ Use PBC grease on all shims as shown in Figure 4. Don't get grease on the brake pad surface.
7. Reinstall the wheels and lug nuts. Tighten lug nuts to 73 - 93 ft-lb with a Torque Wrench.
^ Do Not tighten the wheel lug nuts with an air impact wrench.
^ If you apply uneven or high torque to the lugs it may "distort" the brake rotor and hub. This may cause increased rotor runout and excessive rotor thickness variation as the rotor wears.
Burnish The Brake Pads
8. Burnish the brake pads as follow:
A. Drive the vehicle on a straight smooth road at about 30 mph (50 kph).
B. Use medium brake pedal/foot effort to bring the vehicle to a complete stop from about 30 mph (50 kph). Adjust pedal/foot pressure so that the vehicle stopping time is 3-5 seconds.
C. Cool the brake system by driving at about 30 mph (50 kph) for approximately one minute without stopping.
D. Repeat steps A, B and C 3 to 5 times to complete the burnishing process.
When installing a new rotor, use the following "indexing" procedure. This helps ensure a minimum amount of rotor runout.
1. Make sure the rotor is fully contacting the hub. Clean the rotor to hub surface if it is rusty.
NOTE: For cleaning the hub surface, specifically around the wheel studs, it is recommended to use the Wheel Hub Cleaning Kit # J-42450-A, which can be ordered from TECH-MATE.
2. Install the rotor and all lug nuts. Tighten the lug nuts to 40 ft-lbs.
Place a reference mark on the rotor and hub (see Figure 6).
4. Measure rotor runout with a dial indicator (see Figure 7).
^ If the runout is above 0.03 mm (0.001), continue with step 5.
NOTE: This is a new runout specification. It is slightly less than what may be shown in the ESM.
5. Remove the lug nuts and shift the position of the rotor one lug then reinstall the lug nuts and torque to 40 ft-lbs.
^ Repeat step 4 until the rotor is positioned with the least amount of runout.
6. After you find the position with the least amount of runout, if the runout is still more than 0.03 mm (0.001 in), you'll need to turn (resurface) the new rotors. See step 3 in the Service Procedure.