INFINITI QX56 2006 Factory Service Manual
Manufacturer: INFINITI, Model Year: 2006, Model line: QX56, Model: INFINITI QX56 2006Pages: 3383, PDF Size: 51.76 MB
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EM-30Revision: November 2009
SPARK PLUG (PLATINUM-TIPPED TYPE)
2006 QX56
Checking and adjusting plug gap is not required between
change intervals.
INSTALLATION
Installation is in the reverse order of 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 knock occurs with the standard type spark plug under
conditions such as:
–Extended highway driving
–Frequent high engine revolution
CAUTION:
Do not drop or shock spark plug.
SMA806CA
Make NGK
Standard type PLFR5A-11
Hot type PLFR4A-11
Cold type PLFR6A-11
Gap (Nominal) : 1.1 mm (0.043 in)
Page 1922 of 3383
FUEL INJECTOR AND FUEL TUBEEM-31
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Revision: November 2009 2006 QX56
FUEL INJECTOR AND FUEL TUBEPFP:16600
Removal and InstallationEBS00RF5
CAUTION:
Do not remove or disassemble parts unless instructed as shown.
REMOVAL
1. Remove the engine room cover using power tool. Refer to EM-12, "REMOVAL" .
2. Release the fuel pressure. Refer to EC-80, "
FUEL PRESSURE RELEASE" .
3. Disconnect the negative battery terminal.
4. Disconnect the fuel injector harness connectors.
5. Disconnect the fuel hose assembly from the fuel tubes (RH and LH).
CAUTION:
While hoses are disconnected, plug them to prevent fuel from draining.
Do not separate the fuel connector and fuel hose.
6. Remove the fuel injectors with the fuel tube assembly.
1. Fuel tube (RH) 2. Cap3. Fuel damper
4. O-ring 5. O-ring (blue)6. Fuel injector
7. Clip 8. O-ring (brown)9. O-ring
10. Fuel hose assembly 11. Fuel tube (LH)
KBIA2472E
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FUEL INJECTOR AND FUEL TUBE
2006 QX56
7. Remove the fuel injector from the fuel tube using the followingsteps.
a. Spread open and remove the clip.
b. Remove the fuel injector from the fuel tube by pulling straight out.
CAUTION:
Be careful with remaining fuel that may leak out from fuel
tube.
Do not damage injector nozzles during removal.
Do not bump or drop fuel injectors.
Do not disassemble fuel injectors.
8. Remove the fuel damper from each fuel tube.
INSTALLATION
1. Install the fuel damper to each fuel tube using the following steps.
a. Apply engine oil to the new O-ring and set it into the cup of the fuel tube.
CAUTION:
Handle O-ring with bare hands. Never wear gloves.
Lubricate new O-ring with new engine oil.
Do not clean O-ring with solvent.
Make sure that O-ring and its mating part are free of for-
eign material.
When installing O-ring, do not scratch it with tool or fin-
gernails.
Do not twist or stretch the O-ring.
b. Make sure that the backup spacer is in the O-ring connecting surface of the fuel damper. NOTE:
The backup spacer is part of the fuel damper assembly.
c. Insert the fuel damper until it seats on the fuel tube. CAUTION:
Insert straight, making sure that the axis is lined up.
Do not pressure-fit with excessive force.
d. Install the cap, and then tighten the bolts evenly.
After tightening the bolts, make sure that there is no gap between the cap and fuel tube.
2. Install new O-rings to the fuel injector paying attention to the items below. CAUTION:
Upper and lower O-rings are different colors.
KBIA2506E
Reference value :130 N (13.3 kg, 29.2 lb)
Fuel tube side : Blue
Nozzle side : Brown
KBIA2473E
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Handle O-ring with bare hands. Never wear gloves.
Lubricate new O-ring with new engine oil.
Do not clean O-ring with solvent.
Make sure that O-ring and its mating part are free of foreign material.
When installing O-ring, be careful not to scratch it with tool or fingernails. Also be careful not to
twist or stretch O-ring.
If O-ring was stretched while it was being attached, do not insert it quickly into fuel tube.
Insert O-ring straight into fuel tube. Do not angle or twist it.
3. Install the fuel injector to the fuel tube using the following steps.
a. Insert new clip into clip mounting groove on the fuel injector.
Insert clip so that lug ″A″ of fuel injector matches notch ″A″ of
the clip.
CAUTION:
Do not reuse clip. Replace it with a new one.
Do not allow the clip to interfere with the O-ring. If
interference occurs, replace the O-ring.
b. Insert the fuel injector into the fuel tube with the clip attached.
Insert it while matching it to the axial center.
Insert fuel injector so that lug ″B″ of fuel tube matches notch
″ B″ of the clip.
Make sure that the fuel tube flange is securely seated in the
flange fixing groove on the clip.
c. Make sure that installation is complete by checking that the fuel injector does not rotate or come off.
Make sure that the protrusions of the fuel injectors are aligned
with the cutouts of the clips after installation.
4. Install the fuel tube and fuel injector assembly to the intake manifold. CAUTION:
Do not let the tip of the injector nozzle come in contact with other parts.
Tighten fuel tube assembly bolts ″a ″ to ″b ″ in illustration in two
steps.
5. Install the fuel hose assembly.
Insert connectors straight, making sure that the axis is lined up with fuel tube side to prevent O-ring
from being damaged.
Tighten bolts evenly in several steps.
Make sure that there is no gap between the flange and fuel tube after tightening the bolts.
CAUTION:
Handle O-ring with bare hands. Do not wear gloves.
Lubricate O-ring with new engine oil.
Do not clean O-ring with solvent.
KBIA2507E
1st step : 12.8 N·m (1.3 kg-m, 9 ft-lb)
2nd step : 24.5 N·m (2.5 kg-m, 18 ft-lb)
KBIA2474E
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FUEL INJECTOR AND FUEL TUBE
2006 QX56
Make sure that O-ring and its mating part are free of foreign material.
When installing O-ring, be careful not to scratch it with tool or fingernails. Also be careful not to
twist or stretch O-ring.
If O-ring was stretched while it was being attached, do not insert it quickly into fuel tube.
Insert new O-ring straight into fuel tube. Do not twist it.
6. Installation of the remaining components is in the reverse order of removal.
INSPECTION AFTER INSTALLATION
After installing the fuel tubes, make sure there are no fuel leaks at the connections using the following steps.
1. Apply fuel pressure to the fuel lines by turning ignition switch ON (with engine stopped). Then check for fuel leaks at the connections.
NOTE:
Use mirrors for checking on hidden points.
2. Start the engine and rev it up and check for fuel leaks at the connections.
CAUTION:
Do not touch the engine immediately after stopping, as engine becomes extremely hot.
Page 1926 of 3383
ROCKER COVEREM-35
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Revision: November 2009 2006 QX56
ROCKER COVERPFP:13264
Removal and InstallationEBS00RF6
REMOVAL
1. Remove the engine room cover using power tool. Refer to EM-12, "REMOVAL" .
2. Remove the air duct and resonator assembly. Refer to EM-15, "
REMOVAL" (for LH only).
3. Move the harness on the upper rocker cover and its peripheral aside.
4. Remove the electric throttle control actuator, loosening the bolts diagonally (for LH only).
5. Remove the ignition coils. Refer to EM-28, "
REMOVAL" .
6. Remove the PCV hose from the PCV control valves.
⇐ : Engine front
7. Loosen the bolts in reverse order shown using power tool for rocker cover (A) or (B).
CAUTION:
Do not hold the rocker cover (RH) (B) by the oil filler neck.
1. Rocker cover (LH) 2. PCV control valve3. O-ring
4. Rocker cover gasket (LH) 5. Rocker cover (RH)6. PCV control valve
7. O-ring 8. Oil filler cap9. Rocker cover gasket (RH)
KBIA2508E
WBIA0697E
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EM-36Revision: November 2009
ROCKER COVER
2006 QX56
INSTALLATION
1. Apply liquid gasket to the joint part of the cylinder head andcamshaft bracket following the steps below.
NOTE:
Illustration shows an example of (LH) side (zoomed in shows
No.1 camshaft bracket).
a. Refer to illustration ″a ″ to apply liquid gasket to the joint part of
No.1 camshaft bracket and cylinder head.
b. Refer to illustration ″b ″ to apply liquid gasket 90 ° to illustration
″ a ″.
Use Genuine RTV Silicone Sealant or equivalent. Refer to
GI-46, "
Recommended Chemical Products and Sealants" .
2. Install the rocker cover (A) or (B).
Make sure the new rocker cover gasket is installed in the groove of the rocker cover (A) or (B).
Tighten the bolts in two steps in the numerical order shown.
CAUTION:
Do not hold the rocker cover (RH) (B) by the oil filler
neck.
3. Install the PCV hoses. NOTE:
Remove foreign materials from inside the hose using com-
pressed air.
The inserted length is within 25 - 30 mm (0.98 - 1.18 in) [Target: 25 mm (0.98 in)].
4. Installation of the remaining components is in the reverse order of removal.
KBIA2510E
1st step : 2.0 N·m (0.2 kg-m, 18 in-lb)
2nd step : 8.3 N·m (0.85 kg-m, 73 in-lb)
WBIA0697E
Page 1928 of 3383
TIMING CHAINEM-37
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Revision: November 2009 2006 QX56
TIMING CHAINPFP:13028
Removal and InstallationEBS00RF7
KBIA2511E
Page 1929 of 3383
EM-38Revision: November 2009
TIMING CHAIN
2006 QX56
NOTE:
To remove timing chain and associated parts, start with those on the LH bank. The procedure for remov-
ing parts on the RH bank is omitted because it is the same as that for removal on the LH bank.
To install timing chain and associated parts, start with those on the RH bank. The procedure for installing
parts on the LH bank is omitted because it is the same as that for installation on the RH bank.
REMOVAL
1. Remove the engine assembly from the vehicle. Refer to EM-74, "REMOVAL" .
2. Remove the following components and related parts:
Drive belt auto tensioner and idler pulley. Refer to EM-13, "REMOVAL" .
Thermostat housing and water hose. Refer toCO-21, "Removal of Thermostat Housing, Water Outlet
and Heater Pipe" .
Power steering oil pump bracket. Refer to PS-21, "REMOVAL" .
Oil pan (lower), (upper) and oil strainer. Refer to EM-24, "REMOVAL" .
Ignition coil. Refer to EM-28, "REMOVAL" .
Rocker cover. Refer to EM-35, "REMOVAL" .
3. Remove the chain case cover RH bank (A) and chain case cover LH bank (B) as follows:
a. Loosen and remove the bolts as shown.
b. Cut the liquid gasket and remove the covers using Tool.
CAUTION:
Do not damage mating surfaces.
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.
1. Camshaft sprocket LH bank EXH 2. Camshaft sprocket LH bank INT 3. Camshaft sprocket RH bank INT
4. Camshaft sprocket RH bank EXH 5. Front cover 6. Chain case cover RH bank
7. Chain case cover LH bank 8. Crankshaft pulley bolt 9. Crankshaft pulley
10. Chain tensioner cover 11. Front oil seal 12. Oil pump drive spacer
13. Oil pump assembly 14. Crankshaft sprocket 15. Bracket
16. O-ring 17. Timing chain tension guide RH bank 18. Timing chain slack guide RH bank
19. Timing chain RH bank 20. Timing chain LH bank 21. Chain tensioner RH bank
22. Timing chain slack guide LH bank 23. Timing chain tension guide LH bank 24. Chain tensioner LH bank
Tool number : KV10111100 (J-37228)
WBIA0698E
KBIA2476E
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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
bolts in the two bolt holes [M6 x 1.0 mm (0.04 in)] on the front
surface.
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.
8. Remove the oil pump drive spacer.
Hold and remove the flat space of the oil pump drive spacer
by pulling it forward.
KBIA0400J
PBIC0053E
KBIA2477E
Tool number : KV10111100 (J-37228)
KBIA2478E
KBIA2512E