Infiniti Q45. Manual - part 720

ENGINE MAINTENANCE

MA-17

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INSPECTION AFTER INSTALLATION

1.

Start engine, and check there is no leak of engine oil.

2.

Stop engine and wait for 10 minutes.

3.

Check the engine oil level and add engine oil. Refer to 

LU-6, "ENGINE OIL"

 .

Changing Spark Plugs (Platinum-Tipped Type)

NLS0003X

REMOVAL

1.

Remove engine cover with power tool. Refer to 

EM-13, "ENGINE ROOM COVER"

 .

2.

Remove ignition coil. Refer to 

EM-29, "IGNITION COIL"

 .

3.

Remove spark plug using the spark plug wrench (commercial
service tool).

INSPECTION AFTER REMOVAL

●

Use standard type spark plug for normal condition.

The hot type spark plug is suitable when fouling occurs with the standard type spark plug under conditions
such as:

●

Frequent engine starts

●

Low ambient temperatures

The cold type spark plug is suitable when spark plug knock occurs with the standard type spark plug under
conditions such as:

●

Extended highway driving

●

Frequent high engine revolution
Spark plug (Platinum-tipped type):

CAUTION:

●

Do not drop or shock spark plug.

●

Do not use a wire brush for cleaning.

●

If plug tip is covered with carbon, spark plug cleaner may
be used.

SEM294A

Make

NGK

Standard type

PLFR5A-11

Hot type

PLFR4A-11

Cold type

PLFR6A-11

Gap (Nominal)

: 1.1 mm (0.043 in)

Cleaner air pressure:

Less than 588 kPa (6 kg/cm

2

 , 85 psi)

Cleaning time:

Less than 20 seconds

SMA773C

MA-18

ENGINE MAINTENANCE

●

Checking and adjusting plug gap is not required between
change intervals.

INSTALLATION

Install in the reverse order of removal.

Checking EVAP Vapor Lines

NLS0003Y

1.

Visually inspect EVAP vapor lines for improper attachment and for cracks, damage, loose connections,
chafing and deterioration.

2.

Inspect fuel tank filler cap vacuum relief valve for clogging, sticking, etc.
Refer to 

EC-32, "EVAPORATIVE EMISSION SYSTEM"

 .

SMA806CA

Spark plug:

 : 24.6 N·m (2.5 kg-m, 18 ft-lb)

CHASSIS AND BODY MAINTENANCE

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CHASSIS AND BODY MAINTENANCE

PFP:00100

Checking Exhaust System

NLS0003Z

Check exhaust pipes, muffler and mounting for improper attachment,
leaks, cracks, damage, chafing or deterioration.

●

If anything is found, repair or replace damaged parts.

Checking A/T Fluid

NLS00040

1.

Warm up engine.

2.

Check for A/T fluid leakage.

3.

Loosen the level gauge bolt.

4.

Before driving, A/T fluid level can be checked at A/T fluid tem-
peratures of 30 to 50

°

C (86 to 122

°

F) using “COLD” range on A/

T fluid level gauge as follows.

a.

Park vehicle on level surface and set parking brake.

b.

Start engine and move selector lever through each gear posi-
tion. Leave selector lever in “P” position.

c.

Check A/T fluid level with engine idling.

d.

Remove A/T fluid level gauge and wipe clean with lint-free
paper.

CAUTION:

When wiping away the A/T fluid level gauge, always use
lint-free paper, not a cloth one.

e.

Re-insert A/T fluid level gauge into A/T fluid charging pipe as far as it will go.

CAUTION:

To check A/T fluid level, insert the A/T fluid level gauge until the cap contacts the end of the A/T
fluid charging pipe, with the A/T fluid level gauge reversed from the normal attachment conditions.

f.

Remove A/T fluid level gauge and note reading. If reading is at low side of range, add ATF to the A/T fluid
charging pipe.

CAUTION:

Do not overfill.

5.

Drive vehicle for approximately 5 minutes in urban areas.

6.

Make the A/T fluid temperature approximately 65

°

C (149

°

F).

SMA211A

SCIA7120E

MA-20

CHASSIS AND BODY MAINTENANCE

NOTE:
A/T fluid level will be greatly affected by temperature as shown in figure. Therefore, be certain to
perform operation while checking data with CONSULT-II.

a.

Connect CONSULT-II to data link connector. Refer to 

AT-87, "CONSULT-II SETTING PROCEDURE"

 .

b.

Select “MAIN SIGNALS” in “DATA MONITOR” mode for “A/T” with CONSULT-II.

c.

Read out the value of “ATF TEMP 1”.

7.

Recheck A/T fluid level at A/T fluid temperatures of approximately 65

°

C (149

°

F) using “HOT” range on A/

T fluid level gauge.

CAUTION:

●

When wiping away the A/T fluid level gauge, always use lint-free paper, not a cloth one.

●

To check A/T fluid level, insert the A/T fluid level gauge
until the cap contacts the end of the A/T fluid charging
pipe, with the A/T fluid level gauge reversed from the nor-
mal attachment conditions as shown.

8.

Check A/T fluid condition.

●

If ATF is very dark or smells burned, check operation of A/T.
Flush cooling system after repair of A/T.

●

If ATF contains frictional material (clutches, bands, etc.),
replace radiator and flush cooler line using cleaning solvent
and compressed air after repair of A/T. Refer to 

CO-11,

"RADIATOR"

  and 

AT-14, "A/T Fluid Cooler Cleaning"

 .

9.

Install the removed A/T fluid level gauge in the A/T fluid charging
pipe.

10. Tighten level gauge bolt.

Level gauge bolt:

: 5.1 N·m (0.52 kg-m, 45 in-lb)

SLIA0016E

SCIA2899E

SCIA4896E