Nissan GT-R (R35) · Service Manual BRAKES

BRAKE FLUID

Inspection

 
 BRAKE FLUID LEVEL

  • Check that the fluid level in the reservoir tank is within the specified range (MAX – MIN lines).
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  • Visually check for any brake fluid leakage around the reservoir tank.
  • Check the brake system for any leakage if the fluid level is extremely low (lower than MIN).
  • Check the brake system for fluid leakage if the warning lamp remains illuminated even after the parking brake lever is released.
 
 BRAKE LINE

    1.Check the brake line (tube and hose) for any cracks or damage.
    ■ CAUTION ■
    Replace with new ones if necessary.
    2.Depress the brake pedal with a force of 785 N (80 kg, 176 lb) and hold down the pedal for approximately 5 seconds with the engine running. Check for any fluid leakage.
    ■ CAUTION ■
    Retighten each part to the specified torque and repair any abnormal (damaged, worn, or deformed) part if any fluid leakage is present.

Draining


■ CAUTION ■
  • Never spill or splash brake fluid on painted surfaces. Brake fluid may seriously damage paint. Wipe it out immediately and wash with water if it gets on a painted surface.
  • Turn the ignition switch OFF and disconnect the ABS actuator and electric unit (control unit) connector or the battery negative terminal before performing work.
  • Wrap the flare nut wrench with waste cloth to protect the caliper from damage.
  • If the brake fluid adheres to the caliper or disc rotor, quickly wipe it out.

    1.Connect a vinyl tube to the bleeder valve.
    2.Depress the brake pedal and loosen the bleeder valve to gradually discharge brake fluid.

Refilling


■ CAUTION ■
  • Never spill or splash brake fluid on painted surfaces. Brake fluid may seriously damage paint. Wipe it out immediately and wash with water if it gets on a painted surface.
  • Turn the ignition switch OFF and disconnect the ABS actuator and electric unit (control unit) connector or the battery negative terminal before performing work.
  • Wrap the flare nut wrench with waste cloth to protect the caliper from damage.
  • If the brake fluid adheres to the caliper or disc rotor, quickly wipe it out.

    1.Check that there is no foreign material in the reservoir tank, and refill the brake fluid with new one.
    ■ CAUTION ■
    Never reuse drained brake fluid.
    2.Loosen the bleeder valve, slowly depress the brake pedal to the full stroke, and then release the pedal. Repeat this operation at intervals of 2 or 3 seconds until all of the brake fluid is discharged. Then close the bleeder valve with the brake pedal depressed. Repeat the same work on each wheel.
    3.Perform the air bleeding. Refer to Bleeding Brake System.

Bleeding Brake System

 
 After disassembly of brake line and caliper

■ CAUTION ■
  • Never spill or splash brake fluid on painted surfaces. Brake fluid may seriously damage paint. Wipe it out immediately and wash with water if it gets on a painted surface.
  • Turn the ignition switch OFF and disconnect the ABS actuator and electric unit (control unit) connector or the battery negative terminal before performing work.
  • Wrap the flare nut wrench with waste cloth to protect the caliper from damage.
  • If the brake fluid adheres to the caliper or disc rotor, quickly wipe it out.
  • Monitor the fluid level in the reservoir tank while performing the air bleeding.
  • Always fill with new brake fluid. Never reuse the drained brake fluid.

    1.Connect a vinyl tube to the bleeder valve of the rear left brake.
    2.Fully depress the brake pedal 4 to 5 times.
    3.Loosen the bleed valve and bleed air with the brake pedal depressed, and then quickly tighten the bleeder valve.
    4.Repeat steps 2 to 3 until all of the air is out of the brake line.
    5.Repeat steps 1 to 4. Occasionally fill with the brake fluid in order to keep the reservoir tank at least half full. Bleed air in the following order: rear right → rear left → front right → front left.
    6.Check that the fluid level in the reservoir tank is within the specified range after air bleeding.
    7.Check each item of brake pedal. Adjust if outside the specification. Refer to Inspection and Adjustment.
    8.Run the vehicle until the surface temperature of caliper reaches 70 to 80°C (158 to 176°F), and then perform the stops 1 to 8 with the caliper heated.
    ■ CAUTION ■
    • Be careful because the temperature of caliper is very hot.
    • Depress the brake pedal rapidly to drain the brake fluid quickly.

    9.Check each item of brake pedal again. Adjust if outside the specification. Refer to Inspection and Adjustment.
 
 After replacing brake pad and disc rotor

■ CAUTION ■
  • Never spill or splash brake fluid on painted surfaces. Brake fluid may seriously damage paint. Wipe it out immediately and wash with water if it gets on a painted surface.
  • Turn the ignition switch OFF and disconnect the ABS actuator and electric unit (control unit) connector or the battery negative terminal before performing work.
  • Wrap the flare nut wrench with waste cloth to protect the caliper from damage.
  • If the brake fluid adheres to the caliper or disc rotor, quickly wipe it out.
  • Monitor the fluid level in the reservoir tank while performing the air bleeding.
  • Always fill with new brake fluid. Never reuse the drained brake fluid.

    1.Perform the running-in of brake pad and disc rotor.
    2.Connect a vinyl tube to the bleeder valve of the rear left brake.
    3.Fully depress the brake pedal 4 to 5 times.
    ■ CAUTION ■
    Depress the brake pedal quickly.
    4.Loosen the bleed valve and bleed air with the brake pedal depressed, and then quickly tighten the bleeder valve.
    ■ CAUTION ■
    • Be careful because the temperature of caliper is very hot.
    • Drain the brake fluid swiftly.

    5.Repeat steps 3 to 4 until all of the air is out of the brake line.
    6.Repeat steps 2 to 5. Occasionally fill with the brake fluid in order to keep the reservoir tank at least half full. Bleed air in the following order: rear right → rear left → front right → front left.
    7.Check each item of brake pedal. Adjust if outside the specification. Refer to Inspection and Adjustment.