Infiniti F50. Manual - part 677

ENGINE MAINTENANCE

MA-13

C

D

E

F

G

H

I

J

K

M

A

B

MA

ENGINE MAINTENANCE

PFP:00100

Checking Drive Belts

ELS000KQ

WARNING:

Be sure to perform when the engine is stopped.

●

Remove air duct (inlet) when inspecting drive belt for alternator, water pump and A/C compressor.

●

Remove undercover (with power tool) when inspecting power steering oil pump belt.

●

Make sure that indicator (single line notch) of each auto tensioner is within the allowable working range
(between three line notches).
NOTE:

●

Check the auto tensioner indication when engine is cold.

●

When new drive belt is installed, the range should be A.

●

The indicator notch is located on the moving side of the tensioner for alternator, water pump and A/C
compressor belt, while it is found on the fixed side for power steering oil pump belt. 

●

Visually check entire belt for wear, damage or cracks.

●

If the indicator is out of allowable working range or belt is damaged, replace the belt.

Tension Adjustment

ELS000KR

Belt tensioning is not necessary, as it is automatically adjusted by auto tensioner.

Changing Engine Coolant

ELS000KS

WARNING:

●

To avoid being scalded, never change engine coolant when engine is hot.

●

Wrap a thick cloth around cap and carefully remove the cap. First, turn the cap a quarter of a turn
to release built-up pressure. Then turn the cap all the way.

DRAINING ENGINE COOLANT

1.

Remove engine undercover with power tool.

2.

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

●

Be careful not to allow engine coolant to contact drive belts.

When draining all engine coolant in the system, also perform the following steps.

PBIC2162E

MA-14

ENGINE MAINTENANCE

3.

Remove air relief plug on heater hose.

4.

Drain engine coolant from both sides of cylinder block when
draining all engine coolant in the system.

5.

Check drained engine coolant for contaminants such as rust, corrosion or discoloration.
If contaminated, flush engine cooling system. Refer to 

MA-15, "FLUSHING COOLING SYSTEM"

 .

6.

Remove reservoir tank, drain engine coolant, then clean reservoir tank.

REFILLING ENGINE COOLANT

1.

Install reservoir tank if removed, and radiator drain plug.

2.

Install cylinder block drain plugs if removed.

●

Apply thread sealant to the thread of cylinder block drain plugs.
Use Genuine Thread Sealant or equivalent. Refer to 

GI-46, "RECOMMENDED CHEMICAL PROD-

UCTS AND SEALANTS"

 . 

PBIC0954E

PBIC0145E

PBIC0146E

Radiator drain plug:

 : 0.78 - 1.56 N·m (0.08 - 0.16 kg-m, 7 - 14 in-lb)

Cylinder block drain plug (right, left):

 : 14.7 - 24.5 N·m (1.5 - 2.5 kg-m , 11 - 18 ft-lb)

ENGINE MAINTENANCE

MA-15

C

D

E

F

G

H

I

J

K

M

A

B

MA

3.

Fill radiator and reservoir tank to specified level.

●

Use genuine Nissan anti-freeze engine coolant or equiva-
lent mixed with water (distilled or demineralized).
Refer to 

MA-11, "RECOMMENDED FLUIDS AND LUBRI-

CANTS"

.

●

Pour engine coolant through engine coolant filler neck
slowly of less than 2  (2-1/8 US qt, 1-3/4 Imp qt) a minute
to allow air in system to escape.

●

When engine coolant overflows air relief hole on heater hose,
install air relief plug.

4.

Warm up engine to normal operating temperature with radiator
cap installed.

5.

Run engine at 3,000 rpm for 10 seconds and return to idle
speed.

●

Repeat two or three times.
Watch engine coolant temperature gauge so as not to overheat engine.

6.

Stop engine and cool down to less than approximately 50

°

C (122

°

F).

●

Cool down using a fan to reduce the time.

●

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

7.

Refill reservoir tank to MAX level line with engine coolant.

8.

Repeat steps 3 through 6 two or more times with radiator cap installed until engine coolant level no longer
drops.

9.

Check cooling system for leaks with engine running.

10. Warm up engine, and check for sound of engine coolant flow while running engine from idle up to 3,000

rpm with heater temperature controller set at several position between COOL and WARM. 

●

Sound may be noticeable at heater unit.

11. Repeat step 10 three times.
12. If sound is heard, bleed air from cooling system by repeating steps 3 through 6 until engine coolant level

no longer drops.   

●

Clean excess engine coolant from engine.

FLUSHING COOLING SYSTEM

1.

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. 

2.

Run engine and warm it up to normal operating temperature.

3.

Rev engine two or three times under no-load.

4.

Stop engine and wait until it cools down.

5.

Drain water from the system. Refer to 

MA-13, "DRAINING ENGINE COOLANT"

 .

6.

Repeat steps 1 through 5 until clear water begins to drain from radiator.

Engine coolant capacity (With reservoir tank at “MAX” 
level):

Approximately 9.8  (10-3/8 US qt, 8-5/8 Imp qt)

SMA182B

Reservoir tank engine coolant capacity (at “MAX” level):

0.8  (7/8 US qt, 3/4 lmp qt)

SMA412B

MA-16

ENGINE MAINTENANCE

Checking Fuel Lines

ELS000KT

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

Fuel Hose Clamp

CAUTION:

Tighten high-pressure rubber hose clamp so that clamp end is
3 mm (0.12 in) from hose end.
Tightening torque specifications are the same for all rubber
hose clamps.
Ensure that screw does not contact adjacent parts.

Changing Air Cleaner Filter

ELS000KU

VISCOUS PAPER TYPE

The viscous paper type filter does not need cleaning between
replacement intervals. Refer to 

MA-7, "PERIODIC MAINTE-

NANCE"

 .

Changing Engine Oil

ELS000KV

WARNING:

●

Be careful not to burn yourself, as engine oil is hot.

●

Prolonged and repeated contact with used engine oil may
cause skin cancer; try to avoid direct skin contact with
used engine oil. If skin contact is made, wash thoroughly
with soap or hand cleaner as soon as possible. 

1.

Remove engine undercover with power tool.

2.

Warm up engine, and check for engine oil leakage from engine
components.

3.

Stop engine and wait for 15 minutes.

4.

Loosen oil filler cap, then remove drain plug.

5.

Drain engine oil. 

6.

Install drain plug with new washer. Refer to 

EM-25, "OIL PAN AND OIL STRAINER"

 .

CAUTION:

●

Be sure to clean drain plug and install with new washer.

SMA803A

MMA104A

SBIA0329E

PBIC0993E