NISSAN 350Z 2007 Z33 Engine Mechanical User Guide

NOISE, VIBRATION AND HARSHNESS (NVH) TROUBLESHOOTING
EM-11
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Revision: 2006 November2007 350Z
Use the Chart Below to Help You Find the Cause of the Symptom.NBS0000C
1. Locate the area where noise occurs.
2. Confirm the type of noise.
3. Specify the operating condition of engine.
4. Check specified noise source.
If necessary, repair or replace these parts.
A: Closely related B: Related C: Sometimes related —: Not relatedLocation
of noiseTy p e o f
noiseOperating condition of engine
Source of
noiseCheck itemRefer-
ence page Before
warm-
upAfter
warm-
upWhen
start-
ingWhen
idlingWhen
racingWhile
driving
Top of
engine
Rocker
cover
Cylinder
headTicking or
clickingCA—AB—Tappet
noiseValve clearanceEM-80
Rattle C A — A B CCamshaft
bearing
noiseCamshaft runout
Camshaft journal oil
clearanceEM-74EM-74
Crank-
shaft pul-
ley
Cylinder
block
(Side of
engine)
Oil panSlap or
knock—A—B B—Piston pin
noisePiston to piston pin oil
clearance
Connecting rod bush-
ing oil clearanceEM-125
EM-127
Slap or
rapA——BBAPiston
slap noisePiston to cylinder bore
clearance
Piston ring side clear-
ance
Piston ring end gap
Connecting rod bend
and torsionEM-129EM-126
EM-126
EM-127
Knock ABCBBBConnect-
ing rod
bearing
noiseConnecting rod bush-
ing oil clearance
Connecting rod bear-
ing oil clearanceEM-127EM-131
Knock A B — A B CMain
bearing
noiseMain bearing oil clear-
ance
Crankshaft runoutEM-132EM-131
Front of
engine
Timin g
chain
caseTapping or
tickingAA—BBBTimin g
chain and
chain ten-
sioner
noiseTiming chain cracks
and wear
Timing chain tensioner
operationEM-60
EM-53
Front of
engineSqueak-
ing or fizz-
ingAB—B—CDrive belts
(Sticking
or slip-
ping)Drive belts deflection
EM-12
CreakingABABABDrive belts
(Slipping)Idler pulley bearing
operation
Squall
CreakAB—BABWater
pump
noiseWater pump operationCO-23,
"WATER
PUMP"

EM-12
DRIVE BELTS
Revision: 2006 November2007 350Z
DRIVE BELTSPFP:02117
Checking Drive BeltsNBS0000D
WARNING:
Be sure to perform this step when engine is stopped.

Make sure that the indicator (C) (notch on fixed side) of drive belt auto-tensioner is within the possible use
range (A).
NOTE:
Check the drive belt auto-tensioner indication when the engine is cold.

When new drive belt is installed, the indicator (C) (notch on fixed side) should be within the range (B) in
the figure.

Visually check entire drive belt for wear, damage or cracks.

If the indicator (C) (notch on fixed side) is out of the possible use range or belts is damaged, replace drive
belt.
Tension AdjustmentNBS0000E
Belt tension is not necessary, as it is automatically adjusted by drive belt auto-tensioner.
Removal and InstallationNBS0000F
REMOVAL
1. Remove undercover with power tool.
2. Remove reservoir tank. Refer to CO-13, "
RADIATOR" .
1. Power steering oil pump 2. Alternator 3. Drive belt auto-tensioner
4. Crankshaft pulley 5. A/C compressor 6. Idler pulley
7. Drive belt 8. Idler pulley
A. Possible use range B.Range when new drive belt is
installedC. Indicator
D. View D
PBIC4943E

DRIVE BELTS
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Revision: 2006 November2007 350Z
3. While securely holding the square hole (A) in pulley center of
auto tensioner (1) with a spinner handle, move spinner handle in
the direction of arrow (loosening direction of drive belt).
CAUTION:
Avoid placing hand in a location where pinching may occur
if the holding tool accidentally comes off.
4. Under the above condition, insert a metallic bar of approximately
6 mm (0.24 in) diameter [hexagonal wrench (C) shown as exam-
ple in the figure] through the holding boss (B) to lock auto-ten-
sioner pulley arm.
5. Remove drive belt.
INSTALLATION
Note the following, and install in the reverse order of removal.
CAUTION:

Make sure drive belt is securely installed around all pulleys.

Make sure drive belt is correctly engaged with the pulley groove.

Check for engine oil and engine coolant are not adhered drive belt and pulley groove.
INSPECTION AFTER INSTALLATION
Turn crankshaft pulley clockwise several times to equalize tension between each pulley, and then confirm ten-
sion of drive belt at indicator (notch on fixed side) is within the possible use range. Refer to EM-12, "
Checking
Drive Belts" .
ComponentsNBS006TG

Refer to GI-11, "Components" for symbol marks in the figure.
Removal and Installation of Drive Belt Auto-TensionerNBS006TH
REMOVAL
1. Remove drive belt. Refer to EM-12, "Removal and Installation" .

Keep auto-tensioner pulley arm locked after drive belt is removed.
2. Remove auto-tensioner and idler pulley.

Keep auto-tensioner pulley arm locked to install or remove auto-tensioner.
: Loosing direction of drive belt
PBIC4944E
1. Front timing chain case 2. Drive belt auto-tensioner 3. Idler pulley
4. Idler pulley
PBIC4945E

EM-14
DRIVE BELTS
Revision: 2006 November2007 350Z
INSTALLATION
Installation is the reverse order of removal.
CAUTION:
If there is damage greater than peeled paint, replace drive belt auto-tensioner.

AIR CLEANER AND AIR DUCT
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Revision: 2006 November2007 350Z
AIR CLEANER AND AIR DUCTPFP:16500
Removal and InstallationNBS0000G

Refer to GI-11, "Components" for symbol marks in the figure.
REMOVAL
1. Remove clips, and slide air duct (inlet) frontward, disengage
clips and air cleaner case.
NOTE:
When removing air duct (inlet), remove front bumper and
bumper fascia stay radiator core support center. Refer to EI-14,
"FRONT BUMPER" and BL-19, "RADIATOR CORE SUPPORT"
.
2. Disconnect harness connector from mass air flow sensor.
1. Mass air flow sensor (RH) 2. Air cleaner filter 3. Holder
4. Bracket 5. Air duct (inlet) 6. Grommet
7. Air cleaner case (RH) 8. Clamp 9. Air duct (RH)
10. Air hose 11. Clamp 12. PCV hose
13. Air duct (LH) 14. Mass air flow sensor (LH) 15. Bracket
16. Air cleaner case (LH) 17. Air duct (inlet)
A. To electric throttle control actuator B. To rocker cover (left bank)
PBIC4986E
KBIA1734E

EM-16
AIR CLEANER AND AIR DUCT
Revision: 2006 November2007 350Z
3. Disconnect PCV hose.
4. Remove air cleaner case/mass air flow sensor assembly and air duct assembly disconnecting their joints.

Add marks as necessary for easier installation.
5. Remove mass air flow sensor from air cleaner case.
CAUTION:
Handle mass air flow sensor with care.

Do not shock it.

Do not disassemble it.

Do not touch its sensor.
INSPECTION AFTER REMOVAL
Inspect air duct for crack or tear.

If anything found, replace air duct.
INSTALLATION
Note the following, and install in the reverse order of removal.

Align marks. Attach each joint. Screw clamps firmly.
CAUTION:
Keep the clearance more than 5 mm between tower bar and air duct.
Changing Air Cleaner FilterNBS0000H
REMOVAL
1. Unhook clips, and lift holder.
2. Remove air cleaner filter.
INSTALLATION
Installation is the reverse order of removal.
PBIC1118E

INTAKE MANIFOLD COLLECTOR
EM-17
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Revision: 2006 November2007 350Z
INTAKE MANIFOLD COLLECTORPFP:14003
Removal and InstallationNBS006VD

Refer to GI-11, "Components" for symbol marks in the figure.
REMOVAL
WARNING:
To avoid the danger of being scalded, do not drain the engine coolant when the engine is hot.
1. Remove tower bar. Refer to FSU-20, "
TOWER BAR" .
1.EVAP canister purge control sole-
noid valve2. Clamp 3. EVAP hose
4. EVAP hose 5. Clamp 6. Water hose
7. Water hose 8.Electric throttle control actuator
(bank1)9. Gasket
10. PCV hose 11. Clamp 12. Intake manifold collector
13. Gasket 14. Water hose 15. Water hose
16.Electric throttle control actuator
(bank2)17. EVAP hose 18. Water hose
19. EVAP tube assembly 20. EVAP hose
A. To vacuum pipe B. To brake booster C. To intake manifold collector
D. To PCV valve E. To heater pipe F. To water outlet (rear)
PBIC4947E

EM-18
INTAKE MANIFOLD COLLECTOR
Revision: 2006 November2007 350Z
2. Remove engine cover (1) (2) with power tool.
3. Remove air cleaner case and air duct (RH, LH). Refer to EM-15, "
AIR CLEANER AND AIR DUCT" .
4. Remove electric throttle control actuator (bank1, bank2) as follows:
NOTE:
When removing only intake manifold collector, move electric throttle control actuator without disconnect-
ing water hose.
a. Drain engine coolant.
CAUTION:
Perform this step when engine is cold.
b. Disconnect water hoses from electric throttle control actuator. When engine coolant is not drained from
radiator, attach plug to water hoses to prevent engine coolant leakage.
CAUTION:
Do not spill engine coolant on drive belt.
c. Disconnect harness connector.
d. Loosen mounting bolts in reverse order as shown in the figure.
CAUTION:

Handle carefully to avoid any shock to electric throttle
control actuator.

Do not disassemble.
NOTE:

Figure shows electric throttle control actuator (bank1) viewed
from the air duct side.

Viewed from the air duct side, order of loosening mounting
bolts of electric throttle control actuator (bank2) is the same
as that of the electric throttle control actuator (bank1).
5. Disconnect vacuum hose, PCV hose and EVAP hose from intake manifold collector.
6. Remove EVAP canister purge volume control solenoid valve and EVAP tube assembly from intake mani-
fold collector.
PBIC4987E
PBIC4948E

INTAKE MANIFOLD COLLECTOR
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Revision: 2006 November2007 350Z
7. Loosen mounting bolts with power tool in reverse order as
shown in the figure to remove intake manifold collector.
CAUTION:
Cover engine openings to avoid entry of foreign materials.
8. Remove PCV hose [between intake manifold collector and rocker cover (right bank)].
INSTALLATION
Note the following, and install in the reverse order of removal.
Intake Manifold Collector
If stud bolts were removed, install them and tighten to the specified torque below.

Tighten mounting bolts in numerical order as shown in the fig-
ure.
NOTE:
Tighten mounting bolts to secure gasket and intake manifold col-
lector.
Water Hose

Insert hose by 27 to 32 mm (1.06 to 1.26 in) from connector end.

Clamp hose at location of 3 to 7 mm (0.12 to 0.28 in) from hose end.
Electric Throttle Control Actuator

Install in the reverse order of removal.

Tighten mounting bolts in numerical order as shown in the fig-
ure.
CAUTION:

Handle carefully to avoid any shock to electric throttle
control actuator.

Do not disassemble.

The figure shows the electric throttle control actuator
(bank1) viewed from the air duct side.

Viewed from the air duct side, order of tightening mount-
ing bolts of electric throttle control actuator (bank2) is
the same as that of the electric throttle control actuator
(bank1).

Perform the “Throttle Valve Closed Position Learning” when harness connector of electric throttle control
actuator is disconnected. Refer to EC-77, "
Throttle Valve Closed Position Learning" .

Perform the “Idle Air Volume Learning” and “Throttle Valve Closed Position Learning” when electric throt-
tle control actuator is replaced. Refer to EC-77, "
Idle Air Volume Learning" .
: Engine front
PBIC4949E
: 10.8 N·m (1.1 kg-m, 8 ft-lb)
: Engine front
PBIC4949E
PBIC4948E

EM-20
INTAKE MANIFOLD
Revision: 2006 November2007 350Z
INTAKE MANIFOLDPFP:14003
Removal and InstallationNBS0000J

Refer to GI-11, "Components" for symbol marks in the figure.
REMOVAL
1. Release fuel pressure. Refer to EC-79, "FUEL PRESSURE RELEASE" .
2. Remove intake manifold collector. Refer to EM-17, "
INTAKE MANIFOLD COLLECTOR" .
3. Remove fuel tube and fuel injector assembly. Refer to EM-34, "
FUEL INJECTOR AND FUEL TUBE" .
4. Remove harness bracket.
5. Loosen mounting nuts and bolts with power tool in reverse order
as shown in the figure to remove intake manifold.
CAUTION:

Cover engine openings to avoid entry of foreign materi-
als.

Put a mark on the intake manifold and the cylinder head
with paint before removal because they need installed in
the specified direction.

Loosen mounting bolts and nuts from the inside of mani-
fold to the outside.
6. Remove gaskets.
1. Harness bracket 2. Intake manifold 3. Gasket
A. Refer to EM-21
PBIC4950E
: Engine front
PBIC4951E