check engine INFINITI QX56 2011 Factory Service Manual
[x] Cancel search | Manufacturer: INFINITI, Model Year: 2011, Model line: QX56, Model: INFINITI QX56 2011Pages: 5598, PDF Size: 94.53 MB
Page 2604 of 5598
EM-42
< REMOVAL AND INSTALLATION >
EXHAUST MANIFOLD AND THREE WAY CATALYST
Tighten mounting nuts in numerical order as shown in the figure.CAUTION:
All exhaust manifold nuts are tightened at twice.
Air Fuel Ratio Sensor 1, Heated Oxygen Sensor 2
CAUTION:
Before installing new sensors, clean exhaust system threads usin g oxygen sensor thread cleaner
(commercial service tool: J-43897-18 or J-43897-12), and apply anti-seize lubricant (commercial ser-
vice tool).
Sensors are not reusable. Replace them with a ne w one after removal. When replacing them, handle
with care not to impact on them.
When installing the new air fu el ratio sensors 1 (1), set the
heated oxygen sensor wren ch [SST: KV10117100(J-44626)] (A)
in the hexagonal part to tighten the them.
Never over torque sensors. Doing so may cause da mage to the sensors, resulting in “MIL” coming
on.
InspectionINFOID:0000000006289552
INSPECTION AFTER DISASSEMBLY
Surface Distortion
Check the surface distortion of the exhaust manifold mating sur- face with a straightedge (A) and a feeler gauge (B).
If it exceeds the limit, replace exhaust manifold.
A: Bank 1
B: Bank 2 : Engine front
JPBIA3475ZZ
JPBIA3492ZZ
Limit : Refer to EM-133, "ExhaustManifold".
JPBIA0018ZZ
Revision: 2010 May2011 QX56
Page 2607 of 5598
HIGH PRESSURE FUEL PUMP AND FUEL HOSEEM-45
< REMOVAL AND INSTALLATION >
C
DE
F
G H
I
J
K L
M A
EM
NP
O
To keep clean the connecting portion and to avoid dam-
age and foreign materials, cover them completely with
plastic bags, etc. or a similar item.
8. Disconnect harness connector from low fuel pressure sensor.
9. Remove fuel hose assembly.
10. Remove fuel pressure sensor. CAUTION:
Never allow water and foreign mate rials enter into the connector.
Never reuse the dropped sensor.
Carefully handle sensor avoiding shocks.
Use hex head support installation fo r removal and installation of sensor.
The contact surface of gasket must not have any stain or scoring by dust etc.
INSTALLATION
1. Install O-ring to high pressure fuel pump. When handi ng new O-ring, paying attention to the following cau-
tion items:
CAUTION:
Handle O-ring with bare hands. Never wear gloves.
Lubricate O-ring with new engine oil.
Never clean O-ring with solvent.
Check that O-ring and its mating pa rt 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 wh ile it was being attached, never insert it quickly
into fuel tube.
Insert new O-ring straight into fu el rail. Never decenter or twist it.
2. Install fuel pressure sensor.
3. Install fuel hose assembly. Temporarily tighten mounting bolt (A) as shown in the figure.
4. Install high pressure fuel pump to front cover. CAUTION:
After removing lifter, replace lifter with a new one.
5. Connect fuel feed hose to high pressure fuel pump. NOTE:
Never allow the machined edge of the high pr essure fuel pump to contact with gasket.
The gasket contact area must be free of dust and scratches.
PBIC2205E
: Engine front
JPBIA4250ZZ
Revision: 2010 May2011 QX56
Page 2608 of 5598
EM-46
< REMOVAL AND INSTALLATION >
HIGH PRESSURE FUEL PUMP AND FUEL HOSE
Check that rotation stopper (A) of fuel feed hose contact highpressure fuel pump.
6. Tighten mounting bolts that are temporarily tightened in step 3.
7. Connect harness connector to high pressure fuel pump.
8. Install fuel pump connector protector.
9. Connect harness connector to low fuel pressure sensor.
10. Note the following, and connect quick connector to install fuel feed hose.
a. Check the connection for foreign material and damage.
b. Align center to insert quick connector straightly into fuel tube. NOTE:
The figure shows engine side as an example.
Insert fuel tube into quick connector until the top spool on fueltube is inserted completely and the second level spool is posi-
tioned slightly below quick connector bottom end.
CAUTION:
Hold “A” position in the figure when inserting fuel tube
into quick connector.
Carefully align center to avoid inclined insertion to pre-
vent damage to O-ring inside quick connector.
Insert until you hear a “c lick” sound and actually feel
the engagement.
To avoid misidentification of engagement with a similar sound , be sure to perform the next
step.
c. Before clamping fuel feed hose with hose clamps, pull quick connector hard by hand holding “A” position.
Check it is completely engaged (connected) so that it does not come out from fuel feed tube.
d. Install quick connector cap to quick connector connection. Install so that the arrow mark on the side faces up.
CAUTION:
Check that quick connector and fuel tube are securely fitinto quick connector cap installation groove.
If quick connector cap canno t be installed smoothly,
quick connector may have not been installed correctly.
Check connection again.
11. Install in the reverse order of removal.
InspectionINFOID:0000000006289555
INSPECTION AFTER INSTALLATION
Check for Fuel Leakage
1. Turn ignition switch “ON” (with the engine stopped). With fuel pressure applied to fuel piping, check that
there is no fuel leakage at connection points.
NOTE:
Use mirrors for checking at points out of clear sight.
2. Start the engine. With engine speed increased, check again that there is no fuel leakage at connection
points.
JSBIA0364ZZ
KBIA0272E
PBIC2348E
Revision: 2010 May2011 QX56
Page 2613 of 5598
![INFINITI QX56 2011 Factory Service Manual
FUEL INJECTOR AND FUEL TUBEEM-51
< REMOVAL AND INSTALLATION >
C
DE
F
G H
I
J
K L
M A
EM
NP
O
a. Install an injector seal drift set [SST: KV101197S0 (—)] (A) to
fuel injector (1).
b. Set seal ring](/img/42/57033/w960_57033-2612.png "INFINITI QX56 2011 Factory Service Manual
FUEL INJECTOR AND FUEL TUBEEM-51
< REMOVAL AND INSTALLATION >
C
DE
F
G H
I
J
K L
M A
EM
NP
O
a. Install an injector seal drift set [SST: KV101197S0 (—)] (A) to
fuel injector (1).
b. Set seal ring")
FUEL INJECTOR AND FUEL TUBEEM-51
< REMOVAL AND INSTALLATION >
C
DE
F
G H
I
J
K L
M A
EM
NP
O
a. Install an injector seal drift set [SST: KV101197S0 (—)] (A) to
fuel injector (1).
b. Set seal ring (1) to injector seal drift set [SST: KV101197S0 (—)]
(A).
c. Straightly insert seal ring (1), which is set in step 2, to fuel injec- tor as shown in the figure and install.
CAUTION:
Be careful that seal ring do es not exceed the groove portion
of fuel injector.
d. Insert injector seal drift set [SST: KV101197S0 (—)] (A) to injec- tor and rotate clockwise and counterclockwise by 90 ° while
pressing seal ring to fit it.
NOTE:
Compress seal ring, because this operation is for rectifying
stretch of seal ring caused by installation and for preventing
sticking when inserting injector into cylinder head.
2. Install O-ring and backup ring to fuel injector. When handing new O-ring and backup ring, paying attention to the following caution items:
CAUTION:
Handle O-ring with bare hands. Never wear gloves.
Lubricate O-ring with new engine oil.
Never clean O-ring with solvent.
Check that O-ring and its mating pa rt 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 wh ile it was being attached, never insert it quickly
into fuel tube.
Insert new O-ring straight into fu el rail. Never decenter or twist it.
JSBIA0347ZZ
JSBIA0348ZZ
JSBIA0350ZZ
JSBIA0351ZZ
Revision: 2010 May2011 QX56
Page 2614 of 5598
EM-52
< REMOVAL AND INSTALLATION >
FUEL INJECTOR AND FUEL TUBE
Always install the back up ring (1) in the right direction as
instructed.
3. Install fuel injector (1) to fuel rail (2) as per the following:
a. Install fuel injector holder (5) to fuel injector. CAUTION:
Never reuse injector holder. Replace it with a new one.
Be careful to keep fuel inject or holder from interfering
with O-ring. If interfer ence occurs, replace O-ring.
b. Insert fuel injector into fuel rail with fuel injector holder attached. Insert it while matching it to the axial center.
Insert so that protrusion (A) of fuel injector is aligned to cutout
(B).
c. Check that installation is complete by checking that fuel injector does not rotate or come off.
Check that protrusions of fuel in jectors and fuel rail are aligned
with cutouts of clips after installation.
4. Insert insulator into mounting hole of fuel injector of cylinder head.
5. Install fuel rail and fuel injector assembly to cylinder head. Tighten mounting bolts and nuts in two steps in numericalorder as shown in the figure.
6. Connect injector harness connector.
7. Install fuel feed tube (bank side) to fuel rail. CAUTION:
When inserting fuel feed tube (b ank side) to fuel rail, press the flange part to install the tube.
Never use O-ring with any scoring.
Never reuse fuel feed tube (ban k side), O-ring and back up ring.
JPBIA3864ZZ
3 : O-ring (blue)
4: Backup ring
JSBIA0352ZZ
: Engine front
1st step : 10.0 N·m (1.0 kg-m, 89 in-lb)
2nd step : 20.5 N·m (2.1 kg-m, 15 ft-lb)
JSBIA0353ZZ
Revision: 2010 May2011 QX56
Page 2615 of 5598
FUEL INJECTOR AND FUEL TUBEEM-53
< REMOVAL AND INSTALLATION >
C
DE
F
G H
I
J
K L
M A
EM
NP
O
Apply engine oil to O-ring.
Tighten mounting bolts in numerical order as shown in the fig-
ure.
8. Install fuel feed tube (pump side) to fuel feed tube (bank side) as per the following:
CAUTION:
Never reuse fuel feed tube (pump side).
a. Apply engine oil to flare screw parts of high pr essure pump side and fuel feed tube (bank side) side.
b. Manually tighten 2 flare nuts without using a t ool until they are seated to screw thread.
c. Tighten mounting bolt (A).
d. Tighten flare nuts in numerical order as shown in the figure.
9. Install in the reverse order of removal.
InspectionINFOID:0000000006289558
INSPECTION AFTER INSTALLATION
Check for Fuel Leakage
1. Turn ignition switch “ON” (with the engine stopped). With fuel pressure applied to fuel piping, check that
there is no fuel leakage at connection points.
NOTE:
Use mirrors for checking at points out of clear sight.
2. Start the engine. With engine speed increased, check again that there is no fuel leakage at connection
points.
CAUTION:
Never touch the engine immediately after it is stopped because the engine is extremely hot.
JPBIA3924ZZ
: Engine front
JSBIA0355ZZ
B :To high pressure fuel pump
: Engine front
JSBIA0356ZZ
Revision: 2010 May2011 QX56
Page 2618 of 5598
EM-56
< REMOVAL AND INSTALLATION >
OIL PAN (LOWER) AND OIL STRAINER
b. Apply a continuous bead of liquid gasket with the tube presser(commercial service tool) to the oil pan (lower) as shown in the
figure.
Use Genuine RTV silicone seal ant or equivalent. Refer to
GI-22, "
Recommended Chemical Products and Sealants".
CAUTION:
Attaching must be done with in 5 minutes after coating.
c. Install oil pan (lower). Tighten mounting bolts in numerical order as shown in the fig-ure.
3. Install oil pan drain plug. Refer to the figure of the components of on the prior page for installation direction of drain plug washer.Refer to EM-54, "
Exploded View".
4. Install in the reverse order of removal after this step. NOTE:
Wait at least 30 minutes after oil pan is installed before pouring engine oil.
InspectionINFOID:0000000006289561
INSPECTION AFTER REMOVAL
Clean oil strainer if any object is attached.
INSPECTION AFTER INSTALLATION
1. Check the engine oil level and adjust engine oil. Refer to LU-7, "Inspection".
2. Start engine, and check there is no leakage of engine oil.
3. Stop engine and wait for 15 minutes.
4. Check the engine oil level again. Refer to LU-7, "
Inspection".
a : 7.5 - 9.5 mm (0.295 - 0.374 in)
b: φ4.0 - 5.0 mm (0.157 - 0.197 in)
: Engine front
JPBIA3496ZZ
: Engine front
JPBIA3495ZZ
Revision: 2010 May2011 QX56
Page 2622 of 5598
EM-60
< REMOVAL AND INSTALLATION >
OIL PAN (UPPER)
3. Install oil pan (lower). Refer to EM-55, "Removal and Installation".
4. Install in the reverse order of removal. NOTE:
At least 30 minutes after oil pan is installed, pour engine oil.
InspectionINFOID:0000000006289564
INSPECTION AFTER DISASSEMBLY
Clean oil strainer if any object is attached.
INSPECTION AFTER ASSEMBLY
1. Check the engine oil level and adjust engine oil. Refer to LU-9, "Inspection".
2. Start engine, and check there is no leakage of engine oil.
3. Stop engine and wait for 15 minutes.
4. Check the engine oil level again. Refer to LU-9, "
Inspection".
Revision: 2010 May2011 QX56
Page 2629 of 5598
TIMING CHAINEM-67
< REMOVAL AND INSTALLATION >
C
DE
F
G H
I
J
K L
M A
EM
NP
O
1. Check that crankshaft key (1) and dowel pin (A) of each cam-
shaft are located as shown in the figure.
NOTE:
Though camshaft does not stop at the position as shown in the
figure, for the placement of cam nose, it is generally accepted
camshaft is placed for the same direction of the figure.
2. Install camshaft sprockets (INT and EXH). Install onto correct side by checking with identification mark(A) on surface.
Exhaust side: Secure the hexagonal portion of exhaust camshaft using a wrench to tighten mounting bolt. Refer toEM-74, "
Exploded View".
Intake side:
Secure the hexagonal portion (located in between journal No.1and journal No. 2) of drive shaft (A) using a wrench (B) to
tighten mounting bolt. Refer to EM-74, "
Exploded View".
NOTE:
The figure shows an example of bank 2.
3. Install high pressure fuel pump camshaft.
4. Install timing chains as per the following:
a. Install crankshaft sprockets for both banks. Install each crankshaft sprocket so that its flange side (thelarger diameter side without teeth) (A) faces in the direction
shown in the figure.
NOTE:
The same parts are used but facing directions are different.Camshaft dowel pin
: At cylinder head upper face side in each bank
Crankshaft key : Straight up
JPBIA2109ZZ
JPBIA2110ZZ
: Engine front
JPBIA2302ZZ
1 : Crankshaft sprocket (bank 1 side)
2 : Crankshaft sprocket (bank 2 side)
JPBIA3542ZZ
Revision: 2010 May2011 QX56
Page 2634 of 5598
EM-72
< REMOVAL AND INSTALLATION >
TIMING CHAIN
d. Being careful not to move seal ring from the installation groove,align dowel pins on front cover with dowel pin holes (C) to install
valve timing control covers.
e. Tighten mounting bolts in numerical order as shown in the fig- ure.
14. Install camshaft position sensor and valve timing c ontrol solenoid valve (RH and LH) to valve timing con-
trol cover, if removed.
Be sure to tighten mounting bolts with flanges completely seated.
15. Install oil pan (upper). Refer to EM-57, "
Exploded View".
16. Install oil pan (lower) and oil strainer. Refer to EM-54, "
Exploded View".
17. Install water pump pulley. Refer to CO-18, "
Exploded View".
18. Install crankshaft pulley. Fix the crankshaft as instructed in the removal procedure. Refer to EM-96, "
FRONT OIL SEAL :
Removal and Installation".
a. Install crankshaft pulley, taking care not to damage front oil seal.
b. Apply engine oil onto threaded parts of crankshaft pulley bolt and seating area. Lightly tapping its center with plastic hammer, insert crankshaft pulley.
CAUTION:
Never tap crankshaft pulley on the side surface wh ere belt is installed (outer circumference).
c. Tighten crankshaft pulley bolt.
d. Put a paint mark (A) on crankshaft pulley (1) aligning with angle mark (B) on crankshaft pulley bolt.
e. Tighten crankshaft pulley bolt (clockwise).
Check the tightening angle by referencing to the notches. Theangle between two notches is 90 degrees.
19. Rotate crankshaft pulley in normal direction (clockwise when viewed from engine front) to confirm it turns smoothly.
20. Install in the reverse order of removal.
InspectionINFOID:0000000006289567
INSPECTION AFTER DISASSEMBLY
Timing Chain
A: Bank 2
B: Bank 1
JPBIA3476ZZ
: 205 N·m (21 kg-m, 151 ft-lb)
Angle tightening: 90 degrees (c)
JPBIA2066ZZ
Revision: 2010 May2011 QX56