2004 INFINITI FX35 rack

CYLINDER HEAD
EM-225
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Revision: 2004 November 2004 FX35/FX45

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, gaskets are leaking. In such a case, replace cylinder head gas-
kets.
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-726, "
TROUBLE DIAGNOSIS" .
Removal and InstallationABS006IQ
REMOVAL
1. Remove engine assembly from vehicle. Refer to EM-236, "ENGINE ASSEMBLY" .
2. Remove exhaust manifold. Refer to EM-178, "
EXHAUST MANIFOLD AND THREE WAY CATALYST" .
3. Remove camshaft. Refer to EM-208, "
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)
PBIC2407E

EM-236
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ENGINE ASSEMBLY
Revision: 2004 November 2004 FX35/FX45
ENGINE ASSEMBLYPFP:10001
Removal and InstallationABS006IT
WARNING:

Situate vehicle on a flat and solid surface.

Place chocks at front and back of rear wheels.

For engines not equipped with engine slingers, attach proper slingers and bolts described in
PARTS CATALOG.
CAUTION:

Always be careful to work safely, avoid forceful or uninstructed operations.

Do not start working until exhaust system and engine coolant are cool enough.

If items or work required are not covered by the engine section, refer to the applicable sections.

Always use the support point specified for lifting.

Use either 2-point lift type or separate type lift as best you can. If board-on type is used for
unavoidable reasons, support at the rear axle jacking point with transmission jack or similar tool
before starting work, in preparation for the backward shift of center of gravity.

For supporting points for lifting and jacking point at rear axle, refer to GI-42, "Garage Jack and
Safety Stand" .
REMOVAL
Outline
At first, remove engine, transmission assembly and front final drive with front suspension member downward.
Then separate engine from transmission.
Preparation
1. Release fuel pressure. Refer to EC-700, "FUEL PRESSURE RELEASE" .
1. Engine mounting insulator (rear) 2. Engine rear member 3. Grommet
4. Collar 5. Plate 6. Engine mounting bracket (LH)
7. Engine mounting insulator (LH) 8. Engine mounting bracket (RH) 9. Engine mounting insulator (RH)
PBIC2364E

ENGINE ASSEMBLY
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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
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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

CYLINDER BLOCK
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Revision: 2004 November 2004 FX35/FX45
CRUSH HEIGHT OF MAIN BEARING

When main bearing cap is removed after being tightened to the
specified torque with main bearings installed, the tip end of bear-
ing must protrude. Refer to EM-244, "
ASSEMBLY" for the
tightening procedure.

If the standard is not met, replace main bearings.
CRUSH HEIGHT OF CONNECTING ROD BEARING

When connecting rod bearing cap is removed after being tight-
ened to the specified torque with connecting rod bearings
installed, the tip end of bearing must protrude. Refer to EM-244,
"ASSEMBLY" for the tightening procedure.

If the standard is not met, replace connecting rod bearings.
DRIVE PLATE

Check drive plate and signal plate for deformation or cracks.
CAUTION:

Do not disassemble drive plate.

Do not place drive plate with signal plate facing down.

When handling signal plate, take care not to damage or
scratch it.

Handle signal plate in a manner that prevents it from
becoming magnetized.

If anything is found, replace drive plate.Standard : There must be crush height.
SEM502G
Standard : There must be crush height.
PBIC1646E
PBIC2367E

SERVICE DATA AND SPECIFICATIONS (SDS)
EM-267
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Revision: 2004 November 2004 FX35/FX45
SPARK PLUG
CAMSHAFT AND CAMSHAFT BEARING
Unit: mm (in)
*: Total indicator reading
Valve Lifter
Unit: mm (in)
Valve Clearance
Unit: mm (in)
*: Approximately 20°C (68°F) MakeNGK
Standard typePLFR5A-11
Hot typePLFR4A-11
Cold typePLFR6A-11
Gap (nominal)1.1 mm (0.043 in)
ItemsStandard Limit
Camshaft journal clearanceNo. 1 0.045 - 0.083 (0.0018 - 0.0033) —
No. 2, 3, 4, 5 0.030 - 0.068 (0.0012 - 0.0027) —
Camshaft journal diameterNo. 1 25.938 - 25.955 (1.0212 - 1.0218) —
No. 2, 3, 4, 5 25.953 - 25.970 (1.0218 - 1.0224) —
Camshaft bracket inner diameter 26.000 - 26.021 (1.0236 - 1.0244) —
Camshaft end play 0.115 - 0.188 (0.0045 - 0.0074) —
Cam height “A”Intake 44.865 - 45.055 (1.7663 - 1.7738) 0.2 (0.008)
Exhaust 43.925 - 44.115 (1.7293 - 1.7368) 0.2 (0.008)
Camshaft runout [TIR*] — 0.02 (0.0008)
Camshaft sprocket runout [TIR*] — 0.15 (0.059)
SEM671
ItemsStandard
Valve lifter outer diameter 33.965 - 33.975 (1.3372 - 1.3776)
Valve lifter hole diameter 34.000 - 34.016 (1.3386 - 1.3392)
Valve lifter clearance 0.025 - 0.051 (0.0010 - 0.0020)
Items Hot Cold* (reference data)
Intake 0.304 - 0.416 (0.012 - 0.016) 0.26 - 0.34 (0.010 - 0.013)
Exhaust 0.308 - 0.432 (0.012 - 0.017) 0.29 - 0.37 (0.011 - 0.015)

EXHAUST SYSTEM
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Revision: 2004 November 2004 FX35/FX45
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

EX-4
EXHAUST SYSTEM
Revision: 2004 November 2004 FX35/FX45
VK45DE
REMOVAL

Disconnect each joint and mounting using power tool.

When removing main muffler, remove main muffler mounting bracket bolts.

Remove exhaust mounting bracket as follows:
1. Remove engine rear undercover.
2. Remove front cross bar. FSU-6, "
FRONT SUSPENSION ASSEMBLY" .
3. Remove exhaust mounting bracket.
INSTALLATION
Note to the following, and install in the reverse order of removal.
10. Grommet 11. Exhaust mounting bracket 12. Grommet
13. Mounting rubber 14. Bracket 15. Ground cable
16. Ring gasket
PBIC1775E
1. Main muffler 2. Mounting rubber 3. Main muffler mounting bracket
4. Mounting rubber 5. Center muffler 6. Dynamic damper
7. Gasket 8. Exhaust front tube 9. Gasket
10. Mounting bracket 11. Exhaust mounting bracket 12. Collar
13. Grommet 14. Grommet 15. Mounting rubber
16. Bracket 17. Ground cable 18. Ring gasket