Infiniti G20 (P11). Manual - part 479

NCMA0006

Checking Drive Belts

NCMA0006S01

SMA072D

Inspect belt for cracks, fraying, wear and oil. If necessary,
replace.

Inspect drive belt deflection or tension at a point on the belt
midway between pulleys. Check belt tension using belt tension
gauge (BT3373-F or equivalent).

Inspect drive belt deflection or tension when engine is
cold. Adjust if belt deflection exceeds the limit or if belt
tension is not within specifications.

Belt tension can also be checked at other points on the belt.

IDX

ENGINE MAINTENANCE

Checking Drive Belts

MA-13

DRIVE BELT DEFLECTION AND TENSION

Deflection adjustment

Unit: mm (in)

Tension adjustment *1

Unit: N (kg, lb)

Used belt

New belt

Used belt

New belt

Limit

After adjust-

ment

Limit

After adjust-

ment

Compressor

With air condi-
tioner com-
pressor

9 (0.35)

5.5 - 6.5

(0.217 - 0.256)

4.5 - 5.5

(0.177 - 0.217)

304 (31, 68)

534 - 623

(54.5 - 63.5,

120.2 - 140.0)

652 - 740

(66.5 - 75.5,

146.6 - 166.5)

Generator

Without air
conditioner
compressor

12 - 13

(0.47 - 0.51)

8 - 9

(0.31 - 0.35)

7 - 8

(0.28 - 0.31)

265 (27, 60)

493 - 583

(50.3 - 59.5,

110.9 - 131.2)

603 - 691

(61.5 - 70.5,

135.6 - 155.5)

Power steer-
ing oil pump

With air condi-
tioner com-
pressor

12 (0.47)

8 - 9

(0.31 - 0.35)

7 - 8

(0.28 - 0.31)

265 (27, 60)

495 - 583

(50.5 - 59.5,

111.4 - 131.2)

603 - 691

(61.5 - 70.5,

135.6 - 155.5)

Without air
conditioner
compressor

12 (0.47)

8 - 9

(0.31 - 0.35)

7 - 8

(0.28 - 0.31)

265 (27, 60)

493 - 583

(50.3 - 59.5,

110.9 - 131.2)

603 - 691

(61.5 - 70.5,

135.6 - 155.5)

Applied pushing force

98 N (10 kg, 22 lb)

—

*1: If the belt tension gauge cannot be installed at check points shown, check belt tension at a different location on the belt.

Changing Engine Coolant

NCMA0006S02

WARNING:

To avoid the danger of being scalded, never change the cool-
ant when the engine is hot.

—DRAINING ENGINE COOLANT—

NCMA0006S0201

Set air conditioning system as follows to prevent coolant from
remaining in the system.

Turn ignition switch “ON” and set temperature controller to
maximum hot position.

Wait 10 seconds before turning ignition switch “OFF”.

SMA902C

Open radiator drain plug at the bottom of radiator and remove
radiator cap.

Be careful not to allow coolant to contact drive belts.
When draining all the coolant in the system, also perform the
following two steps.

ENGINE MAINTENANCE

Checking Drive Belts (Cont’d)

MA-14

SMA379C

SMA073D

Remove cylinder block drain plug and air relief plug.

Check drained coolant for contaminants such as rust, corro-
sion or discoloration.
If contaminated, flush engine cooling system.
Refer to “—FLUSHING COOLING SYSTEM—”, MA-16.

—REFILLING ENGINE COOLANT—

NCMA0006S0202

Install reservoir tank if removed, and radiator drain plug.

Close and tighten cylinder block drain plug securely if
removed.

Apply sealant to the thread of cylinder block drain plug.

: 34.3 - 44.1 N·m (3.5 - 4.5 kg-m, 25 - 33 ft-lb)

SMA182B

Fill radiator slowly with coolant. If air relief plug was removed,
fill until coolant spills from the air relief plug, then install air
relief plug as soon as coolant spills out without bubbles.

Air relief plug:

: 7.2 - 9.8 N·m (0.73 - 1.0 kg-m, 63.4 - 86.8 in-lb)

Use genuine Nissan antifreeze coolant or equivalent
mixed with water (distilled or demineralized).

Refer to “RECOMMENDED FLUIDS AND LUBRICANTS”,
MA-12.

Coolant capacity (Without reservoir tank):

M/T

6.1

(6-1/2 US qt, 5-3/8 Imp qt)

A/T

6.0

(6-3/8 US qt, 5-1/4 Imp qt)

IDX

ENGINE MAINTENANCE

Changing Engine Coolant (Cont’d)

MA-15

SMA412B

Reservoir tank capacity (for MAX level):

0.7

(3/4 US qt, 5/8 Imp qt)

Pour coolant through coolant filler neck slowly to allow air
in system to escape.

Fill radiator and reservoir tank to specified level.

Warm up engine to normal operating temperature with radia-
tor cap installed.

Run engine at 2,500 rpm for 10 seconds and return to idle
speed with radiator cap installed.

Repeat two or three times.

Watch coolant temperature gauge so as not to overheat the
engine.
7.

Stop engine and cool it down.

Cool down using a fan to reduce the time.

If necessary, refill radiator up to filler neck with coolant.

Refill reservoir tank to Max line with coolant.

Repeat step 5 through step 8 two or more times with radiator
cap installed until coolant level no longer drops.

10. Check cooling system for leaks with engine running.
11. Warm up engine, and check for sound of coolant flow while

running engine from idle up to 3,000 rpm with heater tempera-
ture control set at several positions between COOL and HOT.

Sound may be noticeable at heater water cock.

12. If sound is heard, bleed air from cooling system by repeating

steps 5 through 8 until coolant level no longer drops.

Clean excess coolant from engine.

—FLUSHING COOLING SYSTEM—

NCMA0006S0203

Open air relief plug.

Fill radiator with water until water spills from the air relief hole,
then close air relief plug. Fill radiator and reservoir tank with
water and reinstall radiator cap.

Run engine and warm it up to normal operating temperature.

Rev engine two or three times under no-load.

Stop engine and wait until it cools down.

Drain water.

Repeat steps 1 through 6 until clear water begins to drain from
radiator.

SMA803A

Checking Fuel Lines

NCMA0006S03

Inspect fuel lines and tank for improper attachment, leaks, cracks,
damage, loose connections, chafing or deterioration.
If necessary, repair or replace faulty parts.

ENGINE MAINTENANCE

Changing Engine Coolant (Cont’d)

MA-16

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