clock INFINITI QX56 2007 Factory Workshop Manual

DTC P0456 EVAP CONTROL SYSTEM
EC-417
< SERVICE INFORMATION >
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1. Attach the EVAP service port adapter securely to the EVAP ser-
vice port.
2. Set the pressure pump and a hose.
3. Also set a vacuum gauge via 3-way connector and a hose.
4. Turn ignition switch ON.
5. Connect GST and select Service $08.
6. Using Service $08, control the EVAP canister vent control valve
(close).
7. Apply pressure and make sure the following conditions are sat-
isfied.
Pressure to be applied: 2.7 kPa (20 mmHg, 0.79 inHg)
Time to be waited after the pressure drawn in to the EVAP
system and the pressure to be dropped: 60 seconds and
the pressure should not be dropped more than 0.4 kPa (3
mmHg, 0.12 inHg).
If NG, go to EC-417, "
Diagnosis Procedure" .
If OK, go to next step.
8. Disconnect GST.
9. Start engine and warm it up to normal operating temperature.
10. Turn ignition switch OFF and wait at least 10 seconds.
11. Restart engine and let it idle for 90 seconds.
12. Keep engine speed at 2,000 rpm for 30 seconds.
13. Turn ignition switch OFF.
NOTE:
For more information, refer to GST Instruction Manual.
Diagnosis ProcedureINFOID:0000000003531915
1.CHECK FUEL FILLER CAP DESIGN
1. Turn ignition switch OFF.
2. Check for genuine NISSAN fuel filler cap design.
OK or NG
OK >> GO TO 2.
NG >> Replace with genuine NISSAN fuel filler cap.
2.CHECK FUEL FILLER CAP INSTALLATION
Check that the cap is tightened properly by rotating the cap clockwise.
OK or NG
OK >> GO TO 3.
NG >> 1. Open fuel filler cap, then clean cap and fuel filler neck threads using air blower.
2. Retighten until ratcheting sound is heard.
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SEF462UI
SEF915U

EI-4
< SERVICE INFORMATION >
SQUEAK AND RATTLE TROUBLE DIAGNOSIS
SQUEAK AND RATTLE TROUBLE DIAGNOSIS
Work FlowINFOID:0000000003533118
CUSTOMER INTERVIEW
Interview the customer if possible, to determine the conditions that exist when the noise occurs. Use the Diag-
nostic Worksheet during the interview to document the facts and conditions when the noise occurs and any
customer's comments; refer to EI-8, "
Diagnostic Worksheet". This information is necessary to duplicate the
conditions that exist when the noise occurs.
• The customer may not be able to provide a detailed description or the location of the noise. Attempt to obtain
all the facts and conditions that exist when the noise occurs (or does not occur).
• If there is more than one noise in the vehicle, be sure to diagnose and repair the noise that the customer is
concerned about. This can be accomplished by test driving the vehicle with the customer.
• After identifying the type of noise, isolate the noise in terms of its characteristics. The noise characteristics
are provided so the customer, service adviser and technician are all speaking the same language when
defining the noise.
• Squeak —(Like tennis shoes on a clean floor)
Squeak characteristics include the light contact/fast movement/brought on by road conditions/hard surfaces
= higher pitch noise/softer surfaces = lower pitch noises/edge to surface = chirping.
• Creak—(Like walking on an old wooden floor)
Creak characteristics include firm contact/slow movement/twisting with a rotational movement/pitch depen-
dent on materials/often brought on by activity.
• Rattle—(Like shaking a baby rattle)
Rattle characteristics include the fast repeated contact/vibration or similar movement/loose parts/missing
clip or fastener/incorrect clearance.
• Knock —(Like a knock on a door)
Knock characteristics include hollow sounding/sometimes repeating/often brought on by driver action.
• Tick—(Like a clock second hand)
Tick characteristics include gentle contacting of light materials/loose components/can be caused by driver
action or road conditions.
• Thump—(Heavy, muffled knock noise)
Thump characteristics include softer knock/dead sound often brought on by activity.
• Buzz—(Like a bumble bee)
Buzz characteristics include high frequency rattle/firm contact.
• Often the degree of acceptable noise level will vary depending upon the person. A noise that you may judge
as acceptable may be very irritating to the customer.
• Weather conditions, especially humidity and temperature, may have a great effect on noise level.
DUPLICATE THE NOISE AND TEST DRIVE
If possible, drive the vehicle with the customer until the noise is duplicated. Note any additional information on
the Diagnostic Worksheet regarding the conditions or location of the noise. This information can be used to
duplicate the same conditions when you confirm the repair.
SBT842

EM-14
< SERVICE INFORMATION >
DRIVE BELTS
INSTALLATION
Installation is in the reverse order of removal.
CAUTION:
Make sure belt is securely installed around all pulleys.
• Rotate the crankshaft pulley several turns clockwise to equalize belt tension between pulleys.
• Make sure belt tension is within the allowable working range, using the indicator notch on the drive belt auto
tensioner. Refer to EM-13, "
Checking Drive Belts".
Drive Belt Auto Tensioner and Idler PulleyINFOID:0000000003531523
REMOVAL
1. Remove the air duct and resonator assembly. Refer to EM-15, "Removal and Installation".
2. Remove the drive belt. Refer to EM-13, "
Removal and Installation".
3. Remove the drive belt auto tensioner and idler pulley using power tool.
INSTALLATION
Installation is in the reverse order of removal.
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1. Drive belt auto tensioner 2. Idler pulley

TIMING CHAINEM-39
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4. Obtain compression TDC of No. 1 cylinder as follows:
a. Turn the crankshaft pulley clockwise to align the TDC identifica-
tion notch (without paint mark) with the timing indicator on the
front cover.
b. At this time, make sure both intake and exhaust cam lobes of No. 1 cylinder (top front on LH bank) point outside.
• If they do not point outside, turn crankshaft pulley once more.
5. Remove the crankshaft pulley.
a. Loosen the crankshaft pulley bolts using a hammer handle to secure the crankshaft.
b. Remove the crankshaft pulley from the crankshaft using tool. • Remove the crankshaft pulley using suitable tool. Set the boltsin the two bolt holes [M6 x 1.0 mm (0.04 in)] on the front sur-
face.
NOTE:
The dimension between the centers of the two bolt holes is 61
mm (2.40 in).
6. Remove the front cover.
a. Loosen and remove the bolts in the reverse of order shown.
b. Cut the liquid gasket and remove the covers using Tool. CAUTION:
Do not damage mating surfaces.
7. Remove the front oil seal using suitable tool. CAUTION:
Do not damage front cover.
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KBIA0400J
PBIC0053E
KBIA2477E
Tool number : KV10111100 (J-37228)
KBIA2478E

TIMING CHAINEM-45
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b. Select the one most visible notch of the four on the bolt flange.
Corresponding to the selected notch, put a alignment mark
(such as paint) on the crankshaft pulley.
14. Rotate the crankshaft pulley in normal direction (clockwise when viewed from engine front) to check for parts interference.
15. Installation of the remaining components is in the reverse of order of removal.Crankshaft pulley bolt torque
Step 1 : 93.1 N·m (9.5 kg-m, 69 ft-lb)
Step 2 : additional 90
° (angle tightening)
KBIA2519E

EM-46
< SERVICE INFORMATION >
CAMSHAFT
CAMSHAFT
Removal and InstallationINFOID:0000000003531534
NOTE:
Do not remove the engine assembly to perform this procedure.
REMOVAL
1. Remove the RH bank and LH bank rocker covers. Refer to EM-35, "Removal and Installation".
2. Obtain compression TDC of No. 1 cylinder as follows:
a. Turn the crankshaft pulley clockwise to align the TDC identifica- tion notch (without paint mark) with the timing indicator on the
front cover.
1. Cylinder head RH bank 2. Camshaft bracket (No. 2, 3, 4, 5) 3. Valve lifter
4. Camshaft bracket (No. 1) 5. Seal washer 6. Camshaft RH bank EXH
7. Camshaft RH bank INT 8. Camshaft LH bank INT 9. Camshaft LH bank EXH
10. Camshaft sprocket RH bank EXH 11. Camshaft sprocket RH bank INT 12. Camshaft sprocket LH bank INT
13. Camshaft sprocket LH bank EXH 14. Camshaft position sensor (PHASE) 15. O-ring
16. Cylinder head LH bank A. Follow installation procedure
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KBIA2476E

EM-56
< SERVICE INFORMATION >
CAMSHAFT
2. Perform the following procedure so as to prevent the engine from being unintentionally started while
checking.
a. Release fuel pressure. Refer to EC-80, "
Fuel Pressure Check".
b. Disconnect ignition coil and injector harness connectors if practical.
3. Remove IVT control solenoid valve.
4. Crank engine, and then make sure that engine oil comes out from IVT control cover oil hole. End cranking
after checking.
WARNING:
Be careful not to touch rotating parts (drive be lts, idler pulley, and crankshaft pulley, etc.).
CAUTION:
• Engine oil may squirt from IVT control soleno id valve installation hole during cranking. Use a
shop cloth to prevent engine oil from splashin g on worker, engine components and vehicle.
• Do not allow engine oil to get on rubber compon ents such as drive belts or engine mount insula-
tors. Immediately wipe off any splashed engine oil.
5. Clean oil groove between oil strainer and IVT control solenoid valve if engine oil does not come out from IVT control valve cover oil hole. Refer to LU-7, "
Schematic".
6. Remove components between IVT control solenoid va lve and camshaft sprocket (INT), and then check
each oil groove for clogging.
• Clean oil groove if necessary.
7. After inspection, installation of the remaining components is in the reverse order of removal.
Valve ClearanceINFOID:0000000003531536
INSPECTION
NOTE:
Perform the following inspection after removal, installation or replacement of camshaft or valve-related parts,
or if there are unusual engine conditions due to changes in valve clearance over time (starting, idling, and/or
noise).
1. Warm up the engine. Then stop the engine.
2. Remove the engine cover and. Refer to EM-12, "
Removal and Installation".
3. Remove the battery cover. Refer to SC-8, "
Removal and Installation".
4. Remove the air cleaner and air duct assembly EM-15, "
Removal and Installation".
5. Remove the RH bank and LH bank rocker covers using power tool. Refer to EM-35, "
Removal and Instal-
lation".
6. Turn the crankshaft pulley in the normal direction (clockwise when viewed from engine front) to align TDC identification notch
(without paint mark) with timing indicator.
KBIA2476E

CAMSHAFTEM-57
< SERVICE INFORMATION >
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7. At this time, make sure both the intake and exhaust cam noses
of No. 1 cylinder (top front on LH bank) face outside.
• If they do not face outside, turn crankshaft pulley once more.
8. Measure valve clearances at the locations marked “ ×” as shown
in the table below (locations indicated with black arrow).
• ⇐ : Engine front
• ⇐ (black): Measurable at No.1 cylinder compression top dead
center
• ⇐ (white): Measurable at No. 3 cylinder compression top dead
center
•A: RH
•B: LH
• C: Exhaust
• D: Intake
NOTE:
Firing order 1-8-7-3-6-5-4-2
• No. 1 cylinder compression TDC
• Measure valve clearance using suitable tool. CAUTION:
If the inspection was carried out with a cold engine, make
sure the values with a fully warmed up engine are still
within specifications.
9. Turn the crankshaft pulley clockwise 270 ° from the position of No. 1 cylinder compression TDC to obtain
No. 3 cylinder compression TDC.
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Measuring position (RH bank) No. 2 cyl
(E) No. 4 cyl
(F) No. 6 cyl
(G) No. 8 cyl
(H)
No. 1 cylinder at TDC EXH
×
INT ××
Measuring position (LH bank) No. 1 cyl
(J) No. 3 cyl
(K) No. 5 cyl
(L) No. 7 cyl
(M)
No. 1 cylinder at TDC INT
××
EXH ××
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KBIA0185E

CAMSHAFTEM-59
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11. Turn the crankshaft pulley clockwise 90
° from the position of No.
3 cylinder compression TDC (clockwise by 360 ° from the posi-
tion of No. 1 cylinder compression TDC) to measure the intake
and exhaust valve clearances of No. 6 cylinder and the exhaust
valve clearance of No. 2 cylinder.
12. If out of specifications, adjust as necessary.
ADJUSTMENT
NOTE:
• Perform adjustment depending on the selected head thickness of the valve lifter.
• The specified valve lifter thickness is the dimension at normal temperatures. Ignore dimensional differences
caused by temperature. Us e the specifications for hot engine condition to adjust.
1. Remove the camshaft. Refer to EM-46, "
Removal and Installation".
2. Remove the valve lifters at the loca tions that are out of specification.
3. Measure the center thickness of the removed valve lifters using suitable tool.
4. Use the equation below to calculate the valve lifter thickness for replacement.
• Valve lifter thickness calculation:
Thickness of replacement valve lifter = t1+ (C1 - C2)
t1 = Thickness of removed valve lifter
C1 = Measured valve clearance
C2= Standard valve clearance:
• Thickness of a new valve lifter can be identified by stamp marks on the reverse side (inside the cylinder).
Stamp mark N788 indicates 7.88 mm (0.3102 in) in thickness.
• Available thickness of valve lifter: 25 sizes with range 7.88 to 8.36 mm (0.3102 to 0.3291 in) in steps of 0.02 mm (0.0008 in)
(when manufactured at factory). Refer to EM-103, "
Standard
and Limit".
5. Install the selected valve lifter.
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KBIA0057E
KBIA0119E

EM-66
< SERVICE INFORMATION >
CYLINDER HEAD
•Cylinder head bolts are tight ened by pla stic zone tight ening
method.
Whenever the size diff erence between d1 and d2 exceeds
t he limit, r eplace the bolt with a new one.
•If reduction of diameter appears in a position other than d2, use it
as
d2 point.
I NST ALLA TION
1.Install a new cylinder head ga sket.
2. Install the cylinder head. Follow the steps below to tighten the
bol
ts in the numerical order shown.
CAUTIO
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•If cy lind er head bolts are re -u se d, check their diameters
before
inst allation. Refer to GI-45, "Reco mme nded Chemi-
cal Product and Sealant".
a. Apply engine oil to threads and seating surface of the bolts.
b. Measure the tightening angle using T ool.
CAUTIO
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M easure the tighte ning angle using Tool. Do not measure
visuall
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3.I nstallation of t he remaining components is in t he reverse order of removal.
Limit

(d1 - d2): 0.18 mm (0.0071 in)
KBIA 0189E
Step a: 44.1 N·m (4.5 kg -m, 33 f t- lb )
Step c :Loosen in the reverse order of tightening.
Step d : 44.1 N·m (4.5 kg-m, 33 ft-lb)
PBIC0068E
Tool number: KV101 12100 (BT-8653-A)
St ep e : 60° clockwise
Step b : 70° clockwise
Step f : 60° clockwise
WBIA 0603E