Nissan GT-R. Manual - part 56

BRAKE FLUID

BR-9

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BRAKE FLUID

Inspection

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BRAKE FLUID LEVEL

• Check that the fluid level in the reservoir tank is within the specified

range (MAX – MIN lines). 

• 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. 

• Check the reservoir tank for the mixing of foreign matter (e.g. dust)

and oils other than brake fluid.

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

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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) con-

nector 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.

Remove tires. Refer to 

WT-11, "Exploded View"

.

2.

Connect a vinyl tube to the bleeder valve. 

3.

Depress the brake pedal and loosen the bleeder valve to gradually discharge brake fluid. 

Refilling

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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) con-

nector 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. 
• Never allow foreign matter (e.g. dust) and oils other than brake fluid to enter the reservoir tank.
• Since brake fluid is susceptible to deterioration from moisture, discard brake fluid remaining in the

container.

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 

BR-10, "Bleeding Brake System"

.

JPFIA0007ZZ

BR-10

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BRAKE FLUID

Bleeding Brake System

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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) con-

nector 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. 
• Never allow foreign matter (e.g. dust) and oils other than brake fluid to enter the reservoir tank.
• Since brake fluid is susceptible to deterioration from moisture, discard brake fluid remaining in the

container.

1.

Remove tires. Refer to 

WT-11, "Exploded View"

.

2.

Connect a vinyl tube to the bleeder valve of the rear right brake. 

3.

Fully depress the brake pedal 4 to 5 times. 

4.

Loosen the bleed valve and bleed air with the brake pedal depressed, and then quickly tighten the bleeder
valve. 

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 that the fluid level in the reservoir tank is within the specified range after air bleeding. 

8.

Check each item of brake pedal. Adjust if outside the specification. Refer to 

BR-7, "Inspection and Adjust-

ment"

.

9.

Run the vehicle until the surface temperature of caliper reaches 70 to 80

°

C (158 to 176

°

F), and then per-

form the stops 2 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. 

10. Check each item of brake pedal again. Adjust if outside the specification. Refer to 

BR-7, "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) con-

nector 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. 
• Never allow foreign matter (e.g. dust) and oils other than brake fluid to enter the reservoir tank.
• Since brake fluid is susceptible to deterioration from moisture, discard brake fluid remaining in the

container.

1.

Remove tires. Refer to 

WT-11, "Exploded View"

.

2.

Perform the running-in of brake pad and disc rotor. 
• Front disc brake: refer to 

BR-14, "BRAKE PAD : Inspection and Adjustment"

.

• Rear disc brake: refer to 

BR-17, "BRAKE PAD : Inspection and Adjustment"

.

3.

Connect a vinyl tube to the bleeder valve of the rear right brake. 

4.

Fully depress the brake pedal 5 to 6 times. 

CAUTION:

Depress the brake pedal quickly. 

Specified torque

: 14 N·m (1.4 kg-m, 10 ft-lb)

BRAKE FLUID

BR-11

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5.

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. 

6.

Repeat steps 4 to 5 until all of the air is out of the brake line. 

7.

Repeat steps 3 to 6. 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.

8.

Check each item of brake pedal. Adjust if outside the specification. Refer to 

BR-7, "Inspection and Adjust-

ment"

.

Specified torque

: 14 N·m (1.4 kg-m, 10 ft-lb)

BR-12

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BRAKE MASTER CYLINDER

BRAKE MASTER CYLINDER

Inspection

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FLUID LEAK

Check for brake fluid leakage from the master cylinder assembly mounting surface, reservoir tank mounting
surface and brake tube connection.