check engine INFINITI FX35 2004 Service Manual

EM-226
[VK45DE]
CYLINDER HEAD
Revision: 2004 November 2004 FX35/FX45
4. Remove cylinder head bolts in reverse order as shown in the fig-
ure with cylinder head bolt wrench (commercial service tool).
5. Remove cylinder head gaskets.
INSPECTION AFTER REMOVAL
Cylinder Head Bolts Outer Diameter

Cylinder head bolts are tightened by plastic zone tightening
method. Whenever the size difference between “d1” and “d2”
exceeds the limit, replace them with new one.

If reduction of outer diameter appears in a position other than
“d2”, use it as “d2” point.
Cylinder Head Distortion
NOTE:
When performing this inspection, cylinder block distortion should be also checking. Refer to EM-259, "
CYLIN-
DER BLOCK DISTORTION" .
1. Using scraper, wipe off oil, scale, gasket, sealant and carbon deposits from surface of cylinder head.
CAUTION:
Do not allow gasket fragments to enter engine oil or engine coolant passages.
2. At each of several locations on bottom surface of cylinder head,
measure distortion in six directions.

If it exceeds the limit, replace cylinder head.
INSTALLATION
1. Install cylinder head gasket.
2. Turn crankshaft until No. 1 piston is set at TDC.
PBIC0068E
Limit (“d1” - “d2”) : 0.18 mm (0.0071 in)
PBIC2361E
Limit : 0.1 mm (0.004 in)
PBIC0075E

CYLINDER HEAD
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Crankshaft key should line up with the left bank cylinder cen-
ter line as shown in the figure.
3. Install cylinder head follow the steps below to tighten cylinder
head bolts in numerical order as shown in the figure.
CAUTION:
If cylinder head bolts are re-used, check their outer diame-
ters before installation. Refer to EM-226, "
Cylinder Head
Bolts Outer Diameter" .
a. Apply engine oil to threads and seating surface of cylinder head
bolts.
b. Tighten all bolts. 98.1 N·m (10 kg-m, 72 ft-lb).
c. Completely loosen all bolts.
CAUTION:
In step “c”, loosen bolts in reverse order of that indicated in the figure.
d. Tighten all bolts to 44.1 N·m (4.5 kg-m, 33 ft-lb).
e. Turn all bolts 60 degrees clockwise. (Angle tightening)
CAUTION:
Check and confirm the tightening angle by using angle
wrench (SST) and cylinder head bolt wrench (commercial
service tool). Avoid judgment by visual inspection without
SST.
f. Turn all bolts 60 degrees clockwise again. (Angle tightening)
4. Install in the reverse order of removal after this step.
PBIC2389E
: 98.1 N·m (10 kg-m, 72 ft-lb)
: 0 N·m (0 kg-m, 0 ft-lb)
: 44 N·m (4.5 kg-m, 33 ft-lb)PBIC0068E
PBIC0069E

EM-238
[VK45DE]
ENGINE ASSEMBLY
Revision: 2004 November 2004 FX35/FX45

After disconnection, plug the opening on transmission side.
11. Remove front drive shaft (both side). Refer to FAX-12, "
FRONT DRIVE SHAFT" .
12. Remove front propeller shaft. Refer to PR-4, "
FRONT PROPELLER SHAFT" .
13. Remove three way catalyst (both bank). Refer to EM-178, "
EXHAUST MANIFOLD AND THREE WAY
CATALYST" .
Removal Work
1. Install engine slingers into front of left bank cylinder head and
front of right bank cylinder head.
2. Lift with hoist and secure engine in position.
3. Use manual lift table caddy (commercial service tool) or equivalently rigid tool such as transmission jack.
Securely support bottom of suspension member and transmission.
CAUTION:
Put a piece of wood or something similar as the supporting surface, secure a completely stable
condition.
4. Remove front suspension member mounting nuts with power tool. Refer to FSU-6, "
FRONT SUSPEN-
SION ASSEMBLY" .
5. Carefully lower jack, or raise lift to remove engine, transmission
front final drive and front suspension member assembly. When
performing work, observe the following caution:
CAUTION:

Confirm there is no interference with vehicle.

Make sure that all connection points have been discon-
nected.

Keep in mind the center of vehicle gravity changes. If
necessary, use jack(s) to support vehicle at rear jacking
point(s) to prevent it from falling it off the lift.
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 check if 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" . Slinger bolts:
:33.4 N·m (3.4 kg-m, 25 ft-lb)
PBIC1556E
PBIC1557E
Slinger bolts:
:33.4 N·m (3.4 kg-m, 25 ft-lb)
PBIC2447E

ENGINE ASSEMBLY
EM-239
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Revision: 2004 November 2004 FX35/FX45
5. Remove starter motor. Refer to SC-10, "STARTING SYSTEM" .
6. Separate engine from transmission assembly. Refer to AT- 2 6 9 , "
Removal and Installation (AWD models)"
.
7. Remove front final drive from engine. Refer to FFD-10, "
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 to the following, and install in the reverse order of removal.

Where positioning pin is used, be sure to securely insert it into the hole of mating part.

When installing engine mount brackets (RH and LH) to cylinder
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

Before starting engine, check the levels of engine coolant, engine oil and working fluid. If less than
required quantity, fill to the specified level.

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 engine coolant, engine oil, working fluid,
fuel and exhaust gas.

Bleed air from passages in pipes and tubes of applicable lines, such as in cooling system.

After cooling down engine, again check amounts of engine coolant, engine oil and working fluid. Refill to
specified level, if necessary.
Summary of the inspection items:
PBIC2365E
Item Before starting engine Engine running After engine stopped
Engine coolant Level Leakage Level
Engine oil Level Leakage Level
Working fluid Level Leakage Level
Fuel — Leakage —
Exhaust gas — Leakage —

EM-242
[VK45DE]
CYLINDER BLOCK
Revision: 2004 November 2004 FX35/FX45
–Rocker cover; Refer to EM-193, "ROCKER COVER" .
–Other removable brackets
NOTE:
The figure shows an example of widely use engine stand that
can hold mating surface of transmission with drive plate and rear
plate removed.
CAUTION:
Before removing the hanging chains, make sure the engine
stand is stable and there is no risk of overturning.
4. Drain engine oil. Refer to LU-26, "
Changing Engine Oil" .
5. Drain engine coolant from inside engine by removing water
drain plugs “B” as shown in the figure.
6. Remove the following parts and related parts (The parts listed in step 3 are not included here.)

Oil pan and oil strainer; Refer to EM-181, "OIL PAN AND OIL STRAINER" .

Crankshaft pulley, front cover and timing chain; Refer to EM-196, "TIMING CHAIN" .

Camshaft; Refer to EM-208, "CAMSHAFT" .

Cylinder head; Refer to EM-224, "CYLINDER HEAD" .
7. Remove knock sensor.
CAUTION:
Carefully handle sensor, avoiding shocks.
8. Remove piston and connecting rod assembly as follows:

Before removing piston and connecting rod assembly, check the connecting rod side clearance. Refer
to EM-256, "
CONNECTING ROD SIDE CLEARANCE" .
a. Position crankshaft pin corresponding to connecting rod to be removed onto the bottom dead center.
b. Remove connecting rod cap.
c. Using hammer handle or similar tool, push the piston and con-
necting rod assembly out to the cylinder head side.
9. Remove connecting rod bearings from connecting rod and connecting rod cap.
CAUTION:
Identify installation positions, and store them without mixing them up.
PBIC0085E
PBIC1265E
PBIC0086E

EM-246
[VK45DE]
CYLINDER BLOCK
Revision: 2004 November 2004 FX35/FX45

Press-fit pilot converter with its chamfering side facing crank-
shaft as shown in the figure.

It is possible to remove pilot converter without hoisting engine
with engine stand.
5. Install crankshaft to cylinder block.

While turning crankshaft by hand, make sure it turns smoothly.
6. Install main bearing caps.

Align the identification number to the journal position to install.

Install the upper side of the identification number facing the
front of engine. (The number shall be read correctly from the
rear of engine.)

Using plastic hammer or similar tool, tap them lightly to seat
them on the installation position.
NOTE:
Main bearing cap cannot be replaced as a single parts, because
it is machined together with cylinder block.
7. Install each main bearing cap bolt as follows:
a. Apply new engine oil to threads and seating surface of main
bearing cap bolts, and tighten all bolts temporarily.
b. Tighten main bearing cap bolt (M12) in order of 1 to 10.
c. Tighten main bearing cap sub bolt (M9) in order of 11 to 20.
d. Tighten main bearing cap bolt (M12) to 40 degrees clockwise in
order of 1 to 10. (Angle tightening)
CAUTION:
Use angle wrench (SST) to check tightening angle in step
“d” and “e”. Do not make judgment by visual inspection.
e. Tighten main bearing cap sub bolt (M9) to 30 degrees clockwise
in order of 11 to 20. (Angle tightening)
f. Tighten side bolt (M10) in order of 21 to 30.

After installing main bearing cap bolts, make sure that crankshaft can be rotated smoothly.

Check the crankshaft end play. Refer to EM-256, "CRANKSHAFT END PLAY" .
g. Install cover of cylinder block rear left side (next to the starter motor housing).
SEM537E
PBIC0095E
: 39.2 N·m (4.0 kg-m, 29 ft-lb)
: 29.4 N·m (3.0 kg-m, 22 ft-lb)
PBIC0090E
PBIC0096E
: 49 N·m (5.0 kg-m, 36 ft-lb)

CYLINDER BLOCK
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15. Tighten the connecting rod nuts as follows:
a. Apply engine oil to the threads and seats of connecting rod bolts
and nuts.
b. Tighten nuts.
c. Then tighten all nuts 60 degrees clockwise. (Angle tightening)
CAUTION:
Use angle wrench (SST) to check tightening angle. Do not
make judgment by visual inspection.

After tightening nuts, make sure that the crankshaft rotates
smoothly.

Check the connecting rod side clearance. Refer to EM-256, "CONNECTING ROD SIDE CLEARANCE"
.
16. Install knock sensor.

Install it with its connector facing the rear of engine.

Install the sub-harness with its shorter branch line to the right
bank.
CAUTION:

Do not tighten mounting bolts while holding connector.

If any impact by dropping is applied to knock sensor,
replace it with new one.
NOTE:

Make sure that there is no foreign material on the cylinder
block mating surface and the back surface of the knock sen-
sor.

Make sure that the knock sensor does not interfere with other parts.
17. Install in the reverse order of removal after this step.
18. Remove engine assembly from engine stand.
19. Install drive plate.

Align guide pin of crankshaft rear end with pin holes of each
parts to install.

Install drive plate, reinforcement plate and pilot converter (if
not installed in step 4) as shown in the figure.

Face chamfered or rounded edge side to crankshaft.

Holding ring gear with ring gear stopper [SST: J-45476].

Tighten mounting bolts crosswise over several times.

When install pilot converter, using drift [outer diameter:
approx. 35 mm (1.38 in)]. Press-fit as far as it will go. : 14.7 N·m (1.5 kg-m, 11 ft-lb)
PBIC0104E
PBIC0105E
PBIC0106E
PBIC1965E

EX-1
EXHAUST SYSTEM
B ENGINE
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SECTION EX
A
EX
Revision: 2004 November 2004 FX35/FX45
EXHAUST SYSTEM
PREPARATION ........................................................... 2
Commercial Service Tools ........................................ 2
EXHAUST SYSTEM ................................................... 3Checking Exhaust System ........................................ 3
Removal and Installation .......................................... 3
REMOVAL ............................................................. 4
INSTALLATION ..................................................... 4
INSPECTION AFTER INSTALLATION .................. 5

EXHAUST SYSTEM
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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
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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
gas 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