Nissan Sentra. Manual - part 631

CHASSIS AND BODY MAINTENANCE

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Preparation Before Adjustment

Remove inner and outer balance weights from the road wheel. Using releasing agent, remove double-faced

adhesive tape from the road wheel.

CAUTION:

• Be careful not scratch the road wheel during removal.

• After removing double-faced adhesive tape, wipe clean all traces of releasing agent from the road

wheel.

Wheel Balance Adjustment

• If a balancer machine has an adhesive weight mode setting, select the adhesive weight mode setting and

skip Step 2. below. If a balancer machine only has the clip-on (rim flange) weight mode setting, follow Step 2.

to calculate the correct size adhesive weight.

1. Set road wheel on balancer machine using the center hole as a guide. Start the balancer machine.
2. For balancer machines that only have a clip-on (rim flange) weight mode setting, follow this step to calcu-

late the correct size adhesive weight to use. When inner and outer imbalance values are shown on the

balancer machine indicator, multiply outer imbalance value by 5/3 (1.67) to determine balance weight that

should be used. Select the outer balance weight with a value closest to the calculated value above and

install in to the designated outer position of, or at the designated angle in relation to the road wheel.

a. Indicated imbalance value 

× 5/3 (1.67) = balance weight to be

installed

Calculation example:

23 g (0.81 oz) 

× 5/3 (1.67) = 38.33 g (1.35 oz) ⇒ 40 g (1.41 oz)

balance weight (closer to calculated balance weight value)

NOTE:

Note that balance weight value must be closer to the calculated

balance weight value.

Example:

37.4 

⇒ 35 g (1.23 oz)

37.5 

⇒ 40 g (1.41 oz)

3. Install balance weight in the position shown.

CAUTION:

• Do not install the inner balance weight before installing

the outer balance weight.

• Before installing the balance weight, be sure to clean the

mating surface of the road wheel.

• When installing balance weight (1) to road wheel, set it into the

grooved area (A) on the inner wall of the road wheel as shown

so that the balance weight center (B) is aligned with the bal-

ancer machine indication position (angle) (C).

CAUTION:

• Always use Genuine NISSAN adhesive balance weights.

• Balance weights are non-reusable; always replace with

new ones.

• Do not install more than three sheets of balance weight.

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CHASSIS AND BODY MAINTENANCE

4. If calculated balance weight value exceeds 50 g (1.76 oz), install

two balance weight sheets in line with each other as shown.

CAUTION:

Do not install one balance weight sheet on top of another.

5. Start balancer machine again.
6. Install balance weight on inner side of road wheel in the bal-

ancer machine indication position (angle).

CAUTION:

Do not install more than two balance weights.

7. Start balancer machine. Make sure that inner and outer residual

imbalance values are 5 g (0.18 oz) each or below.

8. If either residual imbalance value exceeds 5 g (0.18 oz), repeat installation procedures.

TIRE ROTATION

• Follow the maintenance schedule for tire rotation service intervals.

Refer to 

MA-5, "Explanation of General Maintenance"

.

• When installing the wheel, tighten wheel nuts to the specified

torque.

CAUTION:

• Do not include the T-type spare tire when rotating the tires.

• When installing wheels, tighten them diagonally by dividing

the work two to three times in order to prevent the wheels

from developing any distortion.

• Be careful not to tighten wheel nut at torque exceeding the

criteria for preventing strain of disc rotor.

• Use NISSAN genuine wheel nuts for aluminum wheels.

BRAKE FLUID LEVEL AND LEAKS
BRAKE FLUID LEVEL AND LEAKS : Inspection

INFOID:0000000009756204

BRAKE FLUID LEVEL

• Make sure that the brake fluid level in the reservoir tank is between

the MAX and MIN lines.

• Visually check around the reservoir tank for brake fluid leakage.

• If the brake fluid level is excessively low, check the brake system

for leakage.

• If brake warning lamp remains illuminated after parking brake

pedal is released, check the brake system for brake fluid leakage.

BRAKE LINE

1. Check brake line (tubes and hoses) for cracks, deterioration or other damage. Replace any damaged

parts.

Allowable imbalance

Refer to 

WT-54, "Road Wheel"

.

PEIA0033E

Wheel nut tightening torque

Refer to 

WT-54, "Road Wheel"

.

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CHASSIS AND BODY MAINTENANCE

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2. Check for brake fluid leakage by depressing brake pedal under

a force of 785 N (80 kg-f, 177 lb-ft) for approximately 5 seconds

while engine is running.

CAUTION:

If brake fluid leakage occurs around joints, retighten or

replace damaged parts as necessary.

BRAKE LINES AND CABLES
BRAKE LINES AND CABLES : Inspection

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• Check brake fluid lines and parking brake cables for improper

attachment, leaks, chafing, abrasions, deterioration, etc.

BRAKE FLUID
BRAKE FLUID : Drain and Refill

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CAUTION:

• Do not spill or splash brake fluid on painted surfaces. Brake fluid may damage paint. If brake fluid is

splashed on painted areas, wash it away with water immediately.

• Prior to repair, turn the ignition switch OFF, disconnect the ABS actuator and electric unit (control

unit) connector or negative battery terminal. Refer to 

PG-50, "Exploded View"

.

• Refill brake system with new brake fluid. Refer to 

MA-11, "Fluids and Lubricants"

.

• Do not reuse drained brake fluid.

DRAINING

1. Turn ignition switch OFF and disconnect ABS actuator and electric unit (control unit) connector or nega-

tive battery terminal. Refer to 

PG-50, "Exploded View"

.

2. Connect a vinyl tube to bleeder valve.
3. Depress brake pedal, loosen bleeder valve, and gradually

remove brake fluid.

REFILLING

1. Make sure no foreign material exists in the reservoir and refill with new brake fluid. 

CAUTION:

Do not reuse drained brake fluid.

2. Refill the brake system as follows:

SBR389C

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BRA0007D

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CHASSIS AND BODY MAINTENANCE

• Depress the brake pedal.

• Loosen bleeder valve.

• Slowly depress brake pedal to 2/3 of the brake pedal full stroke.

• Tighten bleeder valve.

• Release brake pedal.

Repeat this operation at intervals of two or three seconds until all old brake fluid is discharged. Add new

brake fluid to master cylinder reservoir sub tank frequently.

CAUTION:

Do not allow master cylinder reservoir to empty as this may cause damage to master cylinder

internal components.

3. Bleed the air out of the brake hydraulic system. Refer to 

BR-17, "Bleeding Brake System"

.

FRONT DISC BRAKE
FRONT DISC BRAKE : Inspection

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PAD WEAR

Check brake pad thickness from an inspection hole on caliper body.

Check using a scale if necessary.

FRONT DISC BRAKE : Inspection

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APPEARANCE

Check surface of disc rotor for uneven wear, cracks or damage. Replace if any abnormal conditions exist.

RUNOUT

1. Check the wheel bearing axial end play before the inspection. Refer to 

FAX-6, "Inspection"

.

2. Secure the disc rotor to the wheel hub and bearing assembly

with wheel nuts at two wheel nut locations.

3. Inspect the runout with a dial gauge, measured at 10 mm (0.39

in) inside the disc edge.

4. Find the installation position with a minimum runout by shifting

the disc rotor-to-wheel hub and bearing assembly installation

position by one hole at a time if the runout exceeds the limit

value.

5. Refinish the disc rotor if the runout is outside the limit even after

performing the above operation. When refinishing, use Tool.

THICKNESS

Wear limit thickness

: Refer to 

BR-55, "Front Disc 

Brake"

.

BRA0010D

Runout

: Refer to 

BR-55, "Front Disc Brake"

.

Tool number

: 38-PFM90.5 ( — )

SBR019B