2005 INFINITI FX35 ESP

CYLINDER HEAD EM-101
[VQ35DE]
C
D E
F
G H
I
J
K L
M A
EM
Revision: 2005 July 2005 FX

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 cylinder has 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
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.
9. After inspection is completed, install removed parts.
10. Start the engine, and make sure that the engine runs smoothly.
11. Perform trouble diagnosis. If DTC appears, erase it. Refer to EC-101, "
TROUBLE DIAGNOSIS" .
ComponentsABS00E67
Removal and InstallationABS004X8
REMOVAL
1. Remove camshaft. Refer to EM-84, "CAMSHAFT" .
NOTE:
It is also possible to perform the following steps 2 and 3 just before removing camshaft.
2. Temporarily fit front suspension member to support engine. Refer to FSU-17, "
FRONT SUSPENSION
MEMBER" .
1. Engine rear lower slinger 2. Cylinder head (left bank) 3. Cylinder head bolt
4. Cylinder head (right bank) 5. Cylinder head gasket (right bank) 6. Cylinder head gasket (left bank)
7. Oil level gauge guide
SBIA0581E

EM-126
[VQ35DE]
CYLINDER BLOCK
Revision: 2005 July 2005 FX
10. Remove pilot converter using the pilot bushing puller [SST] as
necessary.
11. Remove rear oil seal retainer.

Remove by inserting a screwdriver between main bearing cap and rear oil seal retainer.
CAUTION:
If rear oil seal retainer is removed, replace it with new one.
NOTE:
Regard both rear oil seal and retainer as an assembly.
12. Remove baffle plate from main bearing beam (2WD models).
13. Remove piston and connecting rod assembly with the following procedure:

Before removing piston and connecting rod assembly, check the connecting rod side clearance. Refer
to EM-140, "
CONNECTING ROD SIDE CLEARANCE" .
CAUTION:
Be careful not to drop connecting rod bearing, and to scratch the surface.
a. Position crankshaft pin corresponding to connecting rod to be removed onto the bottom dead center.
b. Remove connecting rod bearing cap.
c. Using a hammer handle or similar tool, push piston and connect- ing rod assembly out to the cylinder head side.
CAUTION:
Be careful not to damage the cylinder wall and crankshaft
pin, resulting from an interference of the connecting rod big
end.
14. Remove connecting rod bearings from connecting rod and connecting rod bearing cap. CAUTION:

Be careful not to drop connecting rod bearing, and to scratch the surface.

Identify installation positions, and store them without mixing them up.
15. Remove piston rings form piston.

Before removing piston rings, check the piston ring side clearance. Refer to EM-141, "PISTON RING
SIDE CLEARANCE" .

Use a piston ring expander (commercial service tool).
CAUTION:

When removing piston rings, be careful not to damage
piston.

Be careful not to damage piston rings by expanding them
excessively.
SEM005G
EMQ0191D
PBIC0087E

EM-132
[VQ35DE]
CYLINDER BLOCK
Revision: 2005 July 2005 FX

When installing, align connecting rod bearing stopper protru-
sion with cutout of connecting rods and connecting rod bear-
ing caps to install.

Ensure the oil hole on connecting rod and that on the corre-
sponding bearing are aligned.
12. Install piston and connecting rod assembly to crankshaft.

Position crankshaft pin corresponding to connecting rod to be installed onto the bottom dead center.

Apply engine oil sufficiently to the cylinder bore, piston and crankshaft pin journal.

Match the cylinder position with the cylinder number on connecting rod to install.

Be sure that front mark on piston crown is facing front of engine.

Using a piston ring compressor [SST] or suitable tool, install
piston with the front mark on the piston crown facing the front
of the engine.
CAUTION:
Be careful not to damage the cylinder wall and crankshaft
pin, resulting from an interference of the connecting rod big
end.
13. Install connecting rod bearing cap.

Match the stamped cylinder number marks on connecting rod
with those on connecting rod bearing cap to install.

Be sure that front mark on connecting rod bearing cap is fac-
ing front of the engine.
14. Tighten connecting rod bolt as follows:
a. Inspect the outer diameter of connecting rod bolt. Refer to EM-149, "
CONNECTING ROD BOLT OUTER
DIAMETER" .
b. Apply engine oil to the threads and seats of connecting rod bolts.
c. Tighten connecting rod bolts.
PBIC2067E
PBIC2945E
PBIC0809E
: 19.6 N·m (2.0 kg-m, 14 ft-lb)

EM-136
[VQ35DE]
CYLINDER BLOCK
Revision: 2005 July 2005 FX
Piston Selection Table
Unit: mm (in)
NOTE:

Piston is available together with piston pin as assembly.

Piston pin (piston pin hole) grade is provided only for the parts installed at the plant. For service parts, no
piston pin grades can be selected. (Only “0” grade is available.)

No second grade mark is available on piston.
HOW TO SELECT CONNECTING ROD BEARING
When New Connecting Rod and Crankshaft are Used
Check pin diameter grade (“0”, “1” or “2”) on front of crankshaft, and
select connecting rod bearing of the same grade.
NOTE:
There is no grading for connecting rod big end diameter.
When Crankshaft and Connecting Rod are Reused
1. Measure the connecting rod big end diameter. Refer to EM-142, "CONNECTING ROD BIG END DIAME-
TER" .
2. Make sure that the connecting rod big end diameter is within the standard value.
3. Measure the crankshaft pin journal diameter. Refer to EM-146, "
CRANKSHAFT PIN JOURNAL DIAME-
TER" .
4. Determine the grade of crankshaft pin diameter grade by corresponding to the measured dimension in “Crankshaft pin journal diameter” column of “Connecting Rod Bearing Selection Table”.
5. Select connecting rod bearing of the same grade.
Connecting Rod Bearing Selection Table
Unit: mm (in)
Unit: mm (in)
Undersize Bearings Usage Guide

When the specified connecting rod bearing oil clearance is not obtained with standard size connecting rod
bearings, use undersize (US) bearings.

When using undersize (US) bearing, measure the connecting rod bearing inner diameter with bearing
installed, and grind crankshaft pin so that the connecting rod bearing oil clearance satisfies the standard.
Grade 1 2 (or no mark) 3
Cylinder bore inner diameter 95.500 - 95.510
(3.7598 - 3.7602) 95.510 - 95.520
(3.7602- 3.7606) 95.520 - 95.530
(3.7606 - 3.7610)
Piston skirt diameter 95.480 - 95.490
(3.7590 - 3.7594) 95.490 - 95.500
(3.7594 - 3.7598) 95.500 - 95.510
(3.7598 - 3.7602)
SEM452G
Connecting rod big end diameter 55.000 - 55.013 (2.1654 - 2.1659)
Crankshaft Connecting rod bearing
Crankshaft pin journal diameter Grade (Mark) Dimension (Bearing thickness range) Bearing grade No. Color
51.968 - 51.974 (2.0460 - 2.0462) 0 1.500 - 1.503 (0.0591 - 0.0592) STD 0 Black
51.962 - 51.968 (2.0457 - 2.0460) 1 1.503 - 1.506 (0.0592 - 0.0593) STD 1 Brown
51.956 - 51.962 (2.0455 - 2.0457) 2 1.506 - 1.509 (0.0593 - 0.0594) STD 2 Green

CYLINDER BLOCK EM-137
[VQ35DE]
C
D E
F
G H
I
J
K L
M A
EM
Revision: 2005 July 2005 FX
CAUTION:
In grinding crankshaft pin to use undersize bearings, keep
the fillet R [1.5 - 1.7 mm (0.059 - 0.067 in)].
Bearing undersize table
Unit: mm (in)
HOW TO SELECT MAIN BEARING
When New Cylinder Block and Crankshaft are Used
1. “Main Bearing Selection Table” rows correspond to bearing housing grade on rear left side of cylinder block.
2. “Main Bearing Selection Table” columns correspond to journal diameter grade on front side of crankshaft.
3. Select main bearing grade at the point where selected row and column meet in “Main Bearing Selection Table”.
When Cylinder Block and Crankshaft are Reused
1. Measure cylinder block main bearing housing inner diameter and crankshaft main journal diameter. Refer to EM-144, "
MAIN BEARING HOUSING INNER DIAMETER" and EM-145, "CRANKSHAFT MAIN JOUR-
NAL DIAMETER" .
2. Correspond the measured dimension in “Cylinder block main bearing housing inner diameter” row of “Main Bearing Selection Table”.
3. Correspond the measured dimension in “Crankshaft main journal diameter” column of “Main Bearing Selection Table”.
4. Select main bearing grade at the point where selected row and column meet in following selection table.
PBIC1908E
Size Thickness
US 0.25 (0.0098) 1.626 - 1.634 (0.0640 - 0.0643)
SEM756G
SEM452G

FUEL INJECTOR AND FUEL TUBE EM-193
[VK45DE]
C
D E
F
G H
I
J
K L
M A
EM
Revision: 2005 July 2005 FX
3. Disconnect fuel feed hose on engine side as follows: (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. Remove quick connector cap from quick connector connection. (engine side only)
b. Disconnect quick connector from fuel feed damper as follows: CAUTION:
Disconnect quick connector by using quick connector release [SST: J-45488], not by picking out
retainer tabs (centralized under-floor piping side).
i. With the sleeve side of quick connector release facing to quick connector, install quick connector release onto fuel tube.
ii. Insert quick connector release into quick connector until sleeve contacts and goes no further. Hold quick connector release on
that position.
CAUTION:
Inserting quick connector release hard will not disconnect
quick connector. Hold quick connector release where it
contacts and goes no further.
iii. Draw and pull out quick connector straight from fuel damper. CAUTION:

Pull quick connector holding “A” position as shown in
the figure.

Do not pull with lateral force applied. O-ring inside quick connector may be damaged.

Prepare container and cloth beforehand as fuel will leak out.

Avoid fire and sparks.

Keep parts away from heat source. Especially, be careful when welding is performed around
them.

Do not expose parts to battery electrolyte or other acids.

Do not bend or twist connection between quick connector and fuel feed hose during installa-
tion/removal.
SBIA0353E
SBIA0354E
KBIA0702E

TIMING CHAIN EM-205
[VK45DE]
C
D E
F
G H
I
J
K L
M A
EM
Revision: 2005 July 2005 FX
INSPECTION AFTER REMOVAL
Timing Chain
Check tor cracks and any excessive wear at link plates and roller
links of timing chain. Replace timing chain as necessary.
INSTALLATION
NOTE:

The above figure shows the relationship between the mating mark on each timing chain and that on the
corresponding sprocket, with the components installed.

Parts with an identification mark (R or L) should be installed on the corresponding bank according to the
mark.
Parts with an identification mark:
–Camshaft sprocket (INT)
–Dowel pin groove of camshaft sprocket (EXH) (camshaft sprocket is same part both banks)
–Chain tension guide
–Chain slack guide

To install timing chain and related parts, start with those on right bank. The procedure for installing parts
on left bank is omitted because it is the same as that for installation on right bank.
PBIC0282E
PBIC2344E

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