leak INFINITI FX35 2005 Service Manual

EM-196
[VK45DE]
FUEL INJECTOR AND FUEL TUBE
Revision: 2005 July 2005 FX

Tighten mounting bolts in two steps in numerical order as
shown in the figure.
6. Connect fuel feed hose on engine side as the following: (Excepting to confirm whether or not there is quick connector cap, perform same procedure for the side of centralized under-floor piping as well.)
a. Make sure no foreign substances are deposited in and around fuel tube and quick connector, and no dam- age on them.
b. Thinly apply new engine oil around fuel tube from tip end to spool end.
c. Align center to insert quick connector straightly into fuel tube.

Insert fuel tube into quick connector until top spool is com-
pletely inside quick connector, and 2nd level spool exposes
right below quick connector.
CAUTION:

Hold “A” position as shown 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 “click” sound and actually feel the
engagement.

To avoid misidentification of engagement with a similar
sound, be sure to perform the next step.
d. Pull quick connector by hand holding “A” position. Make sure it is completely engaged (connected) so that it does not come out from fuel tube.
e. Install quick connector cap on quick connector connection. (on engine side only).
CAUTION:
If cap cannot be installed smoothly, quick connector may
have not been installed correctly. Check connection again.
f. Install fuel feed hose to hose clamps.
7. Install in the reverse order of removal after this step.
INSPECTION AFTER INSTALLATION
Check on Fuel Leakage
1. Turn ignition switch “ON” (with engine stopped). With fuel pressure applied to fuel piping, check for fuel leakage at connection points.
NOTE:
Use mirrors for checking at points out of clear sight.
2. Start engine. With engine speed increased, check again for fuel leakage at connection points. CAUTION:
Do not touch engine immediately after stopped, as engine becomes extremely hot. 1st step : 10.1 N·m (1.0 kg-m, 7 ft-lb)
2nd step : 23.5 N·m (2.4 kg-m, 17 ft-lb)
PBIC2338E
KBIA0272E
SBIA0354E

TIMING CHAIN EM-209
[VK45DE]
C
D E
F
G H
I
J
K L
M A
EM
Revision: 2005 July 2005 FX
a. Install new O-rings onto cylinder heads (right and left bank) and
cylinder block.
b. Apply a continuous bead of liquid gasket with tube presser [SST: WS39930000 ( — )] to front cover as shown in the fig-
ure.
Use Genuine RTV Silicone Sealant or equivalent. Refer to
GI-48, "
RECOMMENDED CHEMICAL PRODUCTS AND
SEALANTS" .
c. make sure again that the mating marks on timing chain and that on each sprocket are aligned. Then, install front cover.
CAUTION:
Be careful to avoid interference with the front end of oil
pump drive spacer. Such interference may damage front oil
seal.
d. Tighten mounting bolts in numerical order as shown in the fig- ure.

There are four type mounting bolts.
e. After all mounting bolts are tightened, retighten them in numerical order as shown in the figure. CAUTION:
Be sure to wipe off any excessive liquid gasket leaking onto surface mating with oil pan.
11. Install intake valve timing control cover as follows:
a. At the back of intake valve timing control cover, install new seal rings (three for each bank) to the area to be inserted into camshaft sprocket (INT).
CAUTION:
Do not spread seal ring excessively to avoid breaks and deformation.
SBIA0373E
PBIC0062E
KBIA0354J
PBIC1681E

TIMING CHAIN EM-211
[VK45DE]
C
D E
F
G H
I
J
K L
M A
EM
Revision: 2005 July 2005 FX
f. Further tighten by 90 degrees. (Angle tightening)

Check the tightening angle by referencing to the notches. The
angle between two notches is 90 degrees.
15. Rotate crankshaft pulley in normal direction (clockwise when viewed from engine front) to confirm it turns smoothly.
16. Install in the reverse order of removal after this step. NOTE:
If hydraulic pressure inside timing chain tensioner drops after removal/installation, slack in guide may gen-
erate a pounding noise during and just after engine start. However, this does not indicate an unusualness.
Noise will stop after hydraulic pressure rises.
INSPECTION AFTER INSTALLATION
Inspection for Leaks
The followings are procedures for checking fluids leak, lubricates leak and exhaust gases leak.

Before starting engine, check oil/fluid levels including engine coolant and engine oil. If less than required
quantity, fill to the specified level. Refer to MA-12, "
RECOMMENDED FLUIDS AND LUBRICANTS"

Use procedure below to check for fuel leakage.
–Turn ignition switch “ON” (with engine stopped). With fuel pressure applied to fuel piping, check for fuel
leakage at connection points.
–Start engine. With engine speed increased, check again for fuel leakage at connection points.

Run engine to check for unusual noise and vibration.

Warm up engine thoroughly to make sure there is no leakage of fuel, exhaust gases, or any oil/fluids
including engine oil and engine coolant.

Bleed air from lines and hoses of applicable lines, such as in cooling system.

After cooling down engine, again check oil/fluid levels including engine oil and engine coolant. Refill to the
specified level, if necessary.
Summary of the inspection items:
* Transmission/transaxle/CVT fluid. power steering fluid, brake fluid, etc.
PBIC2346E
Item Before starting engine Engine running After engine stopped
Engine coolant Level Leakage Level
Engine oil Level Leakage Level
Other oils and fluid* Level Leakage Level
Fuel Leakage Leakage Leakage
Exhaust gases — Leakage —

CAMSHAFT EM-217
[VK45DE]
C
D E
F
G H
I
J
K L
M A
EM
Revision: 2005 July 2005 FX

Install camshaft so that dowel pin on front end face are posi-
tioned as shown in the figure. (No. 1 cylinder TDC on its com-
pression stroke)
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 fig-
ure.
3. Install camshaft brackets.

Remove foreign material completely from camshaft bracket
backside and from cylinder head installation face.

Install by referring to installation location mark on upper sur-
face and front mark.

Install so that installation location mark can be correctly read
when viewed from the side of left exhaust bank.

Apply liquid gasket to mating surface of camshaft bracket (No.
1) as shown in the figure.
Use Genuine RTV Silicone Sealant or equivalent. Refer to
GI-48, "
RECOMMENDED CHEMICAL PRODUCTS AND
SEALANTS".
CAUTION:

After installation, be sure to wipe off any excessive liq-
uid gasket leaking from part “A” and “B” (both on right
and left sides).

Remove completely any excess of liquid gasket inside
bracket.

Apply liquid gasket to mating surface of camshaft bracket (No.
6) on left bank intake as shown in the figure.
Use Genuine RTV Silicone Sealant or equivalent. Refer to
GI-48, "
RECOMMENDED CHEMICAL PRODUCTS AND
SEALANTS".
CAUTION:

After installation, be sure to wipe off any excessive liq-
uid gasket leaking from part “A” and “B” (both on right
and left sides).

Remove completely any excess of liquid gasket inside
bracket.
Camshaft dowel pin
: At cylinder head upper face side in each bank
SBIA0366E
PBIC0034E
PBIC2356E
PBIC2357E

EM-230
[VK45DE]
CYLINDER HEAD
Revision: 2005 July 2005 FX

If the engine speed is out of specified range, check battery liquid for proper gravity. Check engine
speed again with normal battery gravity.

If compression pressure is below minimum value, check valve clearances and parts associated with
combustion chamber (valve, valve seat, piston, piston ring, cylinder bore, cylinder head, cylinder head
gasket). After the checking, measure compression pressure again.

If some cylinders have low compression pressure, pour small amount of engine oil into the spark plug
hole of the cylinder to re-check it for compression.
–If the added engine oil improves the compression, piston rings may be worn out or damaged. Check the
piston rings and replace if necessary.
–If the compression pressure remains at low level despite the addition of engine oil, valves may be mal-
functioning. Check valves for damage. Replace valve or valve seat accordingly.

If two adjacent cylinders have respectively low compression pressure and their compression remains
low even after the addition of engine oil, cylinder head gaskets are leaking. In such a case, replace cyl-
inder head gaskets.
8. After inspection is completed, install removed parts in the reverse order of removal.
9. Start engine, and make sure that engine runs smoothly.
10. Perform trouble diagnosis. If DTC appears, erase it. Refer to EC-791, "
TROUBLE DIAGNOSIS" .
ComponentsABS00DFX
Removal and InstallationABS006IQ
REMOVAL
1. Remove engine assembly from vehicle. Refer to EM-240, "ENGINE ASSEMBLY" .
2. Remove exhaust manifold. Refer to EM-182, "
EXHAUST MANIFOLD AND THREE WAY CATALYST" .
3. Remove camshaft. Refer to EM-212, "
CAMSHAFT" .
1. Engine coolant temperature sensor 2. Washer 3. Cylinder head gasket (left bank)
4. Harness bracket 5. Cylinder head (right bank) 6. Cylinder head bolt
7. Cylinder head gasket (right bank) 8. Cylinder head bolt 9. Cylinder head (left bank)
PBIC2756E

ENGINE ASSEMBLY EM-241
[VK45DE]
C
D E
F
G H
I
J
K L
M A
EM
Revision: 2005 July 2005 FX
Preparation
1. Release fuel pressure. Refer to EC-789, "FUEL PRESSURE RELEASE" .
2. Drain engine coolant from radiator. Refer to CO-37, "
Changing Engine Coolant" .
CAUTION:

Perform this step when engine is cold.

Do not spill engine coolant on drive belts.
3. Disconnect both battery terminal. Refer to SC-4, "
BATTERY" .
4. Remove crankshaft position sensor (POS) from transmission. CAUTION:

Handle carefully to avoid dropping and shocks.

Do not disassemble.

Do not allow metal powder to adhere to magnetic part at sensor tip.

Do not place sensors in a location where they are exposed to magnetism.
5. Remove the following parts:

Hood assembly; Refer to BL-13, "HOOD" .

Engine cover; Refer to EM-172, "ENGINE ROOM COVER" .

Front and rear engine undercover

Air duct (inlet), air duct and air cleaner case assembly; Refer to EM-176, "AIR CLEANER AND AIR
DUCT" .

Drive belts; Refer to EM-173, "DRIVE BELTS" .

Radiator and radiator hoses (upper and lower); Refer to CO-41, "RADIATOR" .

Front road wheels and tires
Engine Room LH
1. Disconnect engine room harness from the engine side and set it aside for easier work.
2. Disconnect heater hoses, and install plugs to avoid leakage of engine coolant.
3. Disconnect ground cable from exhaust manifold cover to vehicle.
4. Disconnect vacuum hose between vehicle and engine and set it aside.
5. Discharge refrigerant from A/C circuit. Refer to ATC-138, "
REFRIGERANT LINES" .
6. Remove A/C piping from A/C compressor, and temporarily fasten it on vehicle with a rope. Refer to AT C -
140, "Components" .
Engine Room RH
1. Disconnect fuel feed hose and EVAP hose. Refer to EM-192, "FUEL INJECTOR AND FUEL TUBE" .
CAUTION:
Fit plugs onto disconnected hose to prevent fuel leak.
2. Disconnect engine room harness from the engine side and set it aside for easier work.
3. Disconnect ground cable from exhaust manifold cover to vehicle.
4. Disconnect vacuum hose between vehicle and engine and set it aside.
5. Disconnect reservoir tank of power steering oil pump from engine, and move it aside for easier work. CAUTION:
When temporarily securing, keep reservoir tank upright to avoid a fluid leak.
Vehicle Underbody
1. Remove front cross bar. Refer to FSU-6, "FRONT SUSPENSION ASSEMBLY" .
2. Disconnect power steering oil pump from engine. Move it from its location and secure with a rope for eas- ier work. Refer to PS-33, "
Removal and Installation (VK45DE Models)" .
3. Remove A/T fluid cooler tube. Refer to AT- 2 7 0 , "
TRANSMISSION ASSEMBLY" .
4. Remove exhaust front tube and center muffler with power tool. Refer to EX-3, "
EXHAUST SYSTEM" .
5. Remove RH and LH transverse link mounting bolts and nuts. Refer to FSU-14, "
TRANSVERSE LINK" .
6. Disconnect stabilizer connecting rod lower. Refer to FSU-6, "
FRONT SUSPENSION ASSEMBLY" .
7. Remove A/T control rod at control device assembly side. Then temporarily secure it on transmission, so that it does not sag. Refer to AT- 2 3 3 , "
SHIFT CONTROL SYSTEM" .

ENGINE ASSEMBLY EM-243
[VK45DE]
C
D E
F
G H
I
J
K L
M A
EM
Revision: 2005 July 2005 FX
Separation Work
1. Change engine slinger installing to cylinder head (right bank).
NOTE:
In order to keep secure position when hoisting engine.
2. Remove engine mounting insulators (RH and LH) under side nut with power tool.
3. Lift with hoist and separate engine and transmission assembly from front suspension member. CAUTION:

Before and during this lifting, always make sure that any harnesses are left connected.

Avoid damage to and oil/grease smearing or spills onto engine mounting insulator.
4. Remove alternator. Refer to SC-23, "
CHARGING SYSTEM" .
5. Remove starter motor. Refer to SC-10, "
STARTING SYSTEM" .
6. Separate engine from transmission assembly. Refer to AT- 2 7 3 , "
Removal and Installation (AWD Models)"
.
7. Remove front final drive from engine. Refer to FFD-12, "
FRONT FINAL DRIVE ASSEMBLY" .
8. Remove engine mounting insulators (RH and LH) and brackets (RH and LH) from engine with power tool.
9. Remove engine rear member and engine mounting insulator (rear) from transmission.
INSTALLATION
Note the following, and install in the reverse order of removal.

Do not allow engine mounting insulator to be damage and careful no engine oil gets on it.

For a location with a positioning pin, insert it securely into hole of mating part.

For a part with a specified installation orientation, refer to component figure in EM-240, "Removal and
Installation" .

When installing engine mounting brackets (RH and LH) on cylin-
der block, tighten two upper bolts (shown as “A” in the figure)
first. Then tighten two lower bolts (shown as “B” in the figure).
INSPECTION AFTER INSTALLATION
Inspection for Leaks
The followings are procedures for checking fluids leak, lubricates leak and exhaust gases leak.

Before starting engine, check oil/fluid levels including engine coolant and engine oil. If less than required
quantity, fill to the specified level. Refer to MA-12, "
RECOMMENDED FLUIDS AND LUBRICANTS"

Use procedure below to check for fuel leakage.
–Turn ignition switch “ON” (with engine stopped). With fuel pressure applied to fuel piping, check for fuel
leakage at connection points.
–Start engine. With engine speed increased, check again for fuel leakage at connection points.

Run engine to check for unusual noise and vibration.

Warm up engine thoroughly to make sure there is no leakage of fuel, exhaust gases, or any oil/fluids
including engine oil and engine coolant. Slinger bolts:
:33.4 N·m (3.4 kg-m, 25 ft-lb)
PBIC2447E
PBIC2365E

EM-244
[VK45DE]
ENGINE ASSEMBLY
Revision: 2005 July 2005 FX

Bleed air from lines and hoses of applicable lines, such as in cooling system.

After cooling down engine, again check oil/fluid levels including engine oil and engine coolant. Refill to the
specified level, if necessary.
Summary of the inspection items:
* Transmission/transaxle/CVT fluid. power steering fluid, brake fluid, etc. Item Before starting engine Engine running After engine stopped
Engine coolant Level Leakage Level
Engine oil Level Leakage Level
Other oils and fluid* Level Leakage Level
Fuel Leakage Leakage Leakage
Exhaust gases — Leakage —

EXHAUST SYSTEM EX-3
C
D E
F
G H
I
J
K L
M A
EX
Revision: 2005 July 2005 FX
EXHAUST SYSTEMPFP:20100
Checking Exhaust SystemABS005Z5
Check exhaust pipes, muffler and mounting for improper attachment,
leaks, cracks, damage or deterioration.

If anything is found, repair or replace damaged parts.
Removal and InstallationABS005Z6
CAUTION:

Be sure to use genuine exhaust system parts or equivalents which are specially designed for heat
resistance, corrosion resistance, and shape.

Perform the operation with the exhaust system fully cooled down because the system will be hot
just after engine stops.

Be careful not to cut your hand on the heat insulator edge.
VQ35DE
SMA211A
PBIC1583E
1. Main muffler 2. Mounting rubber 3. Main muffler mounting bracket
4. Mounting rubber 5. Center muffler 6. Gasket
7. Exhaust front tube 8. Gasket 9. Collar

EXHAUST SYSTEM EX-5
C
D E
F
G H
I
J
K L
M A
EX
Revision: 2005 July 2005 FX

Tighten main muffler mounting bracket bolts in numerical order
as shown in the figure.
CAUTION:

Always replace exhaust tube gaskets with new ones when reassembling.

If heat insulator is badly deformed, repair or replace it. If deposits such as mud pile up on the heat
insulator, remove them.

When installing heat insulator avoid large gaps or interference between heat insulator and each
exhaust pipe.

Remove deposits from the sealing surface of each connection. Connect them securely to avoid
gases leakage.

Temporarily tighten mounting nuts on the exhaust manifold side and mounting bolts on the vehi-
cle side. Check each part for unusual interference, and then tighten them to the specified torque.

When installing each mounting rubber, avoid twisting or unusual extension in up/down and right/
left directions.
INSPECTION AFTER INSTALLATION

Make sure clearance between tail tube and bumper is even.

With engine running, check exhaust tube joints for gas leakage and unusual noises.

Check to ensure that mounting brackets and mounting rubbers are installed properly and free from undue
stress. Improper installation could result in excessive noise and vibration.
PBIC1049E