Nissan GT-R. Manual - part 57

BRAKE BOOSTER

BR-13

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BRAKE BOOSTER

Inspection

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OPERATION

Depress the brake pedal several times at 5-second intervals with the
engine stopped. Start the engine with the brake pedal fully
depressed. Check that the clearance between brake pedal and dash
lower panel decreases.
NOTE:
A slight impact with a small click may be felt on the pedal when the
brake pedal is fully depressed. This is a normal phenomenon due to
the brake system operation.

AIR TIGHT

• Idle the engine for 1 minute to apply vacuum to the brake booster,

and stop the engine. Then depress the brake pedal several times
at 5-second intervals until the accumulated vacuum is released to
atmospheric pressure. Check that the clearance between brake
pedal and dash lower panel gradually increases (A 

→

 B 

→

 C) each

time the brake pedal is depressed during this operation.

• Depress the brake pedal with the engine running. Then stop the

engine while holding down the brake pedal. Check that the brake
pedal stroke does not change after holding down the brake pedal
for 30 seconds or more.
NOTE:
A slight impact with a small click may be felt on the pedal when the
brake pedal is fully depressed. This is a normal phenomenon due
to the brake system operation.

BRA0037D

JPFIA0043ZZ

JPFIA0044ZZ

BR-14

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FRONT DISC BRAKE

FRONT DISC BRAKE

BRAKE PAD

BRAKE PAD : Inspection and Adjustment

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INSPECTION

1.

Remove tires. Refer to 

WT-11, "Exploded View"

.

2.

Check the thickness of brake pad from the inspection hole on
caliper. Use a scale to check if necessary. 

3.

Check the brake pad for whitening (carbonizing), uneven wear
and crack. Replace if necessary. (This work is recommended to
be performed by GT-R certified NISSAN dealer.)

CAUTION:

When replacing brake pad, replace all four brake pads
together. (Replacement depends on inspection results
shown below.)
• Front brake pads (a set of right and left) can be replaced alone only when a certified technician

checks for scratches and cracks and judges that the rear brake pads are reusable and when
there is no history of sport driving. (This work is recommended to be performed by GT-R certi-
fied NISSAN dealer.)

• Replace right and left front brake pads together with disc rotors if the replacement of front brake

pad for a front disc rotor is a second replacement. (This work is recommended to be performed
by GT-R certified NISSAN dealer.)

• Replace right and left front brake pads together with front disc rotors if there is a judder. (This

work is recommended to be performed by GT-R certified NISSAN dealer.)

4.

Install tires. Refer to 

WT-11, "Exploded View"

.

ADJUSTMENT

Perform the following procedure when replacing the brake pad and disc rotor. 

CAUTION:

• Be careful of the vehicle speed, because the effectiveness of the brake is decreased by the anti-cor-

rosion paint (silver color) applied for the contact surface with the brake pad for new disc rotor.

• Perform the procedure only on a safe road and be careful of the traffic conditions. 

1.

Drive on flat straight roads. 

2.

Depress the brake pedal to stop the vehicle within 3 to 5 seconds.

3.

Cool the brake. 

4.

Repeat the above steps 1 to 3 until the operational feeling of brake pedal becomes equal to the pre-oper-
ation condition. 

5.

Check that the anti-corrosion paint (silver color) of disc rotor is eliminated. If the anti-corrosion paint (silver
color) remains, repeat the above steps 1 to 3. 

6.

If brake noise occurs, loosen the caliper mounting bolts after checking that the anti-corrosion paint (silver
color) does not remain at the disc rotor, and then perform the caliper position adjustment by tightening to
the specified torque. (This work is recommended to be performed by GT-R certified NISSAN dealer.)

CAUTION:

If the anti-corrosion paint (silver color) remains on the surface of brake pad, polish it with sandpa-
per until completely eliminated.

7.

Use a brake tester to check that it is within the normal range. 

DISC ROTOR

DISC ROTOR : Inspection and Adjustment

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INSPECTION

Appearance

Wear thickness

: Refer to 

BR-23, "Front Disc Brake"

.

NNFIA0007ZZ

FRONT DISC BRAKE

BR-15

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• If the drilled hole of disc rotor is clogged by the brake pad wear particles, clean the dust with a brush or a

vacuum dust collector. 

• Check the following item and then replace the disc rotor if necessary.

CAUTION:

When replacing front disc rotors, replace them together with right and left front brake pads.
(Replacement depends on inspection results shown below.)
• Front disc rotors (a set of right and left) can be replaced alone only when a certified technician

checks for scratches and cracks and judges that the front brake pads are reusable and when there
is no history of sport driving. (This work is recommended to be performed by GT-R certified NIS-
SAN dealer.)

• Replace right and left front brake pads together with front disc rotors if there is a judder. (This work

is recommended to be performed by GT-R certified NISSAN dealer.)

- The surface of the disc rotor for over burnt, uneven wear, cracks, serious damage, peel-off, remarkable

groove or vertical streaks.

- Confirm if there is no crack larger than 4mm around drilled hole of a disc rotor.
- The floating pin and nut for wear or damage.
- Any different groove in 0.3 mm (0.012 in) for disc rotor with brake noise.
• Check disc rotor nut (

) for rust.

• Check that brake pad replacement is not performed twice for a sin-

gle disc rotor.

Thickness

1.

Remove tires. Refer to 

WT-11, "Exploded View"

.

2.

Check the thickness of the disc rotor using a micrometer.
Replace the disc rotor if the thickness is below the wear limit.

CAUTION:

When replacing front disc rotors, replace them together
with right and left front brake pads. (Replacement depends
on inspection results shown below.)
• Front disc rotors (a set of right and left) can be replaced

alone only when a certified technician checks for
scratches and cracks and judges that the front brake pads
are reusable and when there is no history of sport driving.
(This work is recommended to be performed by GT-R cer-
tified NISSAN dealer.)

• Replace right and left front brake pads together with front disc rotors if there is a judder. (This

work is recommended to be performed by GT-R certified NISSAN dealer.)

3.

Install tires. Refer to 

WT-11, "Exploded View"

.

ADJUSTMENT

Perform the following procedure when replacing the brake pad and disc rotor. 

CAUTION:

• Be careful of the vehicle speed, because the effectiveness of the brake is decreased by the anti-cor-

rosion paint (silver color) applied for the contact surface with the brake pad for new disc rotor.

• Perform the procedure only on a safe road and be careful of the traffic conditions. 

1.

Drive on flat straight roads. 

2.

Depress the brake pedal to stop the vehicle within 3 to 5 seconds.

3.

Cool the brake. 

NNFIA0029ZZ

Wear thickness

: Refer to 

BR-23, "Front Disc Brake"

.

NNFIA0009ZZ

BR-16

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FRONT DISC BRAKE

4.

Repeat the above steps 1 to 3 until the operational feeling of brake pedal becomes equal to the pre-oper-
ation condition. 

5.

Check that the anti-corrosion paint (silver color) of disc rotor is eliminated. If the anti-corrosion paint (silver
color) remains, repeat the above steps 1 to 3. 

6.

If brake noise occurs, loosen the caliper mounting bolts after checking that the anti-corrosion paint (silver
color) does not remain at the disc rotor, and then perform the caliper position adjustment by tightening to
the specified torque. (This work is recommended to be performed by GT-R certified NISSAN dealer.)

7.

Use a brake tester to check that it is within the normal range.