2008 INFINITI FX35 engine

EM-132
< SERVICE INFORMATION >[VQ35DE]
CYLINDER BLOCK
 When installing, align connecting rod bearing stopper protru-
sion with cutout of connecting rods and connecting rod bearing
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 cyli nder 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 t he piston crown facing the front
of the engine.
CAUTION:
Be careful not to damage the cylinder wall and crankshaft
pin, resulting from an interf erence 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-138, "
Inspection After Disassembly".
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)
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CYLINDER BLOCKEM-133
< SERVICE INFORMATION > [VQ35DE]
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d. Then tighten all connecting rod bolts 90 degrees clockwise
(Angle tightening).
CAUTION:
Always use the angle wrench [SST: KV10112100 (BT8653-
A)]. Avoid tightening b ased on visual check alone.
 After tightening connecting rod bolts, make sure that crank-
shaft rotates smoothly.
 Check the connecting rod side clearance. Refer to EM-138,
"Inspection After Disassembly".
15. Install baffle plate to main bearing beam (2WD models).
16. Install new rear oil seal retainer to cylinder block.  Apply new engine oil to both oil seal lip and dust seal lip.
 Apply a continuous bead of liquid gasket with the tube presser(commercial service tool) to rear oil seal retainer as shown in
the figure.
Use Genuine RTV Silicone Seal ant or equivalent. Refer to
GI-44, "
Recommended Chemical Product and Sealant".
CAUTION:
 Replace with a new parts.
 Attaching should be done wi thin 5 minutes after coating.
 Make sure the garter spring is in position and seal lips not
inverted.
NOTE:
Regard both rear oil seal and retainer as an assembly.
17. Install pilot converter.  With a drift [outer diameter: approx. 33 mm (1.30 in)], press-fitas far as it will go.
 Press-fit pilot converter with its chamfer facing crankshaft as shown in the figure.
SEM953E
PBIC2661E
PBIC0899E
SEM537E
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EM-134
< SERVICE INFORMATION >[VQ35DE]
CYLINDER BLOCK
18. Install knock sensor.
 Install knock sensor so that connector faces front of theengine.
 After installing knock sensor, connect harness connector, and lay it out to rear of the engine.
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 bac k surface of knock sensor.
 Make sure that knock sensor does not interfere with other parts.
19. Note the following, assemble in the reverse order of disassembly after this step.
Drive plate When installing drive plate to crankshaft, be sure to correctly align crankshaft side guide pin and drive plate side guide pin hole.
- If these are not aligned correctly, engine runs roughly and “MIL” turns on.
 Install drive plate and reinforcement plate as shown in the fig- ure.
 Holding ring gear with the ring gear stopper [SST: KV10117700 (J44716)].
 Tighten the mounting bolts crosswise over several times.
CAUTION:
Make sure that dowel pin is installed at the rear end of
crankshaft.
How to Select Piston and BearingINFOID:0000000001325748
DESCRIPTION
*: For the service parts, the grade for fitting cannot be selected between piston pin and connecting rod. (Only “0” grade is a vailable.) The
information at the shipment from the plant is described as a reference.
 The identification grade stamped on each part is the grade for the dimension measured in new condition.
This grade cannot apply to reused parts.
 For reused or repaired parts, measure the dimens ion accurately. Determine the grade by comparing the
measurement with the values of each selection table.
 For details of the measurement method of each part , the reuse standards and the selection method of the
selective fitting parts, refer to the text.
PBIC0810E
PBIC0910E
Selection points Selection parts Selection items Selection methods
Between cylinder block and
crankshaft Main bearingMain bearing grade
(bearing thickness) Determined by match of cylin-
der block bearing housing
grade (inner diameter of hous-
ing) and crankshaft journal
grade (outer diameter of jour-
nal)
Between crankshaft and con-
necting rod Connecting rod bearingConnecting rod bearing grade
(bearing thickness) Combining service grades for
connecting rod big end diame-
ter and crankshaft pin outer di-
ameter determine connecting
rod bearing selection.
Between cylinder block and pis-
ton Piston and piston pin assembly
(Piston is available together
with piston pin as assembly.)Piston grade
(piston skirt diameter)
Piston grade = cylinder bore
grade (inner diameter of bore)
Between piston and connecting
rod* ———
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EM-140
< SERVICE INFORMATION >[VQ35DE]
CYLINDER BLOCK
 Piston pin (piston pin hole) grade is provided only for t
he parts installed at the plant. For service parts, no
piston pin grades can be selected. (Only “0” grade is available.)
PISTON RING SIDE CLEARANCE
 Measure the side clearance of piston ring and piston ring groove with a feeler gauge.
 If the measured value exceeds the limit, replace piston ring, and measure again. If it still exceeds the limit,
replace piston also.
PISTON RING END GAP
 Make sure that the cylinder bore i nner diameter is within the speci-
fication. Refer to "Cylinder Bore inner Diameter ".
 Lubricate with new engine oil to piston and piston ring, and then insert piston ring until middle of cylinder with piston, and measure
the piston ring end gap with a feeler gauge.
 If the measured value exceeds the limit, replace piston ring, and measure again. If it still exceeds the limit,
re-bore cylinder and use oversize piston and piston rings.
CONNECTING ROD BEND AND TORSION
Standard:
Top ring : 0.045 - 0.080 mm (0.002 - 0.003 in)
2nd ring : 0.030 - 0.070 mm (0.001 - 0.003 in)
Oil ring : 0.065 - 0.135 mm (0.003 - 0.005 in)
Limit:
Top ring : 0.11 mm (0.004 in)
2nd ring : 0.10 mm (0.004 in)
SEM024AA
Standard:
Top ring : 0.23 - 0.33 mm (0.009 - 0.013 in)
2nd ring : 0.33 - 0.48 mm (0.013 - 0.019 in)
Oil ring : 0.20 - 0.50 mm (0.008 - 0.020 in)
Limit:
Top ring : 0.54 mm (0.021 in)
2nd ring : 0.80 mm (0.031 in)
Oil ring : 0.95 mm (0.037 in)
PBIC0118E
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EM-142
< SERVICE INFORMATION >[VQ35DE]
CYLINDER BLOCK
Measure the outer diameter of piston pin with a micrometer.
Connecting Rod Bushing Oil Clearance
(Connecting rod bushing oil clearance) = (Connecting rod bus
hing inner diameter) – (Piston pin outer diame-
ter)
 If the calculated value exceeds the limit, replac e connecting rod assembly and/or piston and piston pin
assembly.
 If replacing piston and piston pin assembly, refer to EM-134, "
How to Select Piston and Bearing".
 If replacing connecting rod assembly, refer to "CONNECTING
ROD BEARING OIL CLEARANCE" to select the connecting rod
bearing.
Factory installed parts grading: Service parts apply only to grade “0”.
Unit: mm (in)
*: After installing in connecting rod
CYLINDER BLOCK DISTORTION
 Using a scraper, remove gasket on the cylinder block su rface, and also remove engine oil, scale, carbon, or
other contamination.
CAUTION:
Be careful not to allow gasket flakes to en ter engine oil or engine coolant passages.
Standard : 21.989 - 22.001 mm (0.8657 - 0.8662 in)
PBIC0117E
Standard : 0.005 - 0.017 mm (0.0002 - 0.0007 in)
Limit : 0.030 mm (0.0012 in)
PBIC0809E
Grade 0 1
Connecting rod bushing
inner diameter *
22.000 - 22.006
(0.8661 - 0.8664) 22.006 - 22.012
(0.8664 - 0.8666)
Piston pin hole diameter 21.993 - 21.999
(0.8659 - 0.8661) 21.999 - 22. 005
(0.8661 - 0.8663)
Piston pin outer diameter 21.989 - 21.995
(0.8657 - 0.8659) 21.995 - 22.001
(0.8659 - 0.8662)
PBIC0812E
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3A893A873A873A8F3A773A9D3AAF3A8A3A8C3A863A9D3AAF3A8B3A8C

CYLINDER BLOCKEM-143
< SERVICE INFORMATION > [VQ35DE]
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 Measure the distortion on the cylinder block upper face at some
different points in six directi ons with a straightedge and a feeler
gauge.
 If it exceeds the limit, replace cylinder block.
MAIN BEARING HOUSING INNER DIAMETER
 Install main bearing caps and main bearing beam without installing main bearings, and tighten main bearing cap bolts to the specified
torque. Refer to EM-123, "
Disassembly and Assembly" for the
tightening procedure.
 Measure the inner diameter of main bearing housing with a bore gauge.
 If out of the standard, replace cylinder block and main bearing caps as assembly.
NOTE:
Cylinder block cannot be replaced as a single part, because it is
machined together with main bearing caps.
PISTON TO CYLINDER BORE CLEARANCE
Cylinder Bore inner Diameter
 Using a bore gauge, measure cylinder bore for wear, out-of-round
and taper at six different points on each cylinder. (“X” and “Y” direc-
tions at “A”, “B” and “C”) (“Y” is in longitudinal direction of engine)
 If the measured value exceeds the limit, or if there are scratches and/or seizure on the cylinder inner wall, hone or re-bore the inner
wall.
 Oversize piston is provided. When using oversize piston, re-bore
cylinder so that the clearance of the piston-to-cylinder bore satis-
fies the standard.
CAUTION:
When using oversize piston, use oversize pistons for all cylin-
ders with oversize piston rings.
Piston Skirt Diameter
Limit : 0.1 mm (0.004 in)
SEM123C
Standard : 63.993 - 64.017 mm (2.5194 - 2.5203 in)
PBIC1643E
Standard inner diameter:
95.500 - 95.530 mm (3.7598 - 3.7610 in)
Wear limit: 0.20 mm (0.0079 in)
Out-of-round (Difference between “X” and “Y”):
Limit: 0.015 mm (0.0006 in)
Taper (Difference between “A” and “C”):
Limit: 0.010 mm (0.0004 in)
Oversize (OS) : 0.2 mm (0.008 in)
PBIC0923E
SEM843E
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EM-146
< SERVICE INFORMATION >[VQ35DE]
CYLINDER BLOCK
 If the calculated value exceeds the limit, select
proper connecting rod bearing according to connecting rod
big end diameter and crankshaft pin journal diameter to obtain the specified bearing oil clearance. Refer to
EM-134, "
How to Select Piston and Bearing".
Method of Using Plastigage
 Remove oil and dust on crankshaft pin journal and the surfaces of each bearing completely.
 Cut a plastigage slightly shorter than the bearing width, and place it in crankshaft axial direction, avoiding oil
holes.
 Install connecting rod bearings to connecting rod and connecting rod bearing cap, and tighten connecting rod bolts to the specified torque. Refer to EM-123, "
Disassembly and Assembly" for the tightening proce-
dure.
CAUTION:
Do not rotate crankshaft.
 Remove connecting rod bearing cap and bearings, and using the scale on the plastigage bag, measure the plastigage width.
NOTE:
The procedure when the measured value exceeds the limit is
same as that described in the “Method by Calculation”.
MAIN BEARING OIL CLEARANCE
Method by Calculation
 Install main bearings to cylinder block and main bearing caps, and
tighten main bearing cap bolts with main bearing beam to the
specified torque. Refer to EM-123, "
Disassembly and Assembly"
for the tightening procedure.
 Measure the inner diameter of main bearing with a bore gauge.
(Oil clearance) = (Main bearing inner diameter) – (Crankshaft main
journal diameter)
 If the calculated value exceeds the limit, select proper main bearing according to main bearing inner diame-
ter and crankshaft main journal diameter to obtain the specified bearing oil clearance. Refer to EM-134,
"How to Select Piston and Bearing".
Method of Using Plastigage
 Remove engine oil and dust on crankshaft journal and the surfaces of each bearing completely.
 Cut a plastigage slightly shorter than the bearing width, and place it in crankshaft axial direction, avoiding oil
holes.
 Install main bearing to cylinder block and main bearing cap, and tighten main bearing bolts with main bear-
ing beam to the specified torque. Refer to EM-123, "
Disassembly and Assembly" for the tightening proce-
dure.
CAUTION:
Never rotate crankshaft.
PBIC1149E
Standard : 0.035 - 0.045 mm (0.0014 - 0.0018 in)
(actual clearance)
Limit : 0.065 mm (0.0026 in)
PBIC1644E
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EM-160
< SERVICE INFORMATION >[VK45DE]
PRECAUTIONS
SERVICE INFORMATION
PRECAUTIONS
Precaution Necessary for Steering W
heel Rotation After Battery Disconnect
INFOID:0000000001524895
NOTE:
 This Procedure is applied only to models with In telligent Key system and NVIS/IVIS (NISSAN/INFINITI
VEHICLE IMMOBILIZER SYSTEM - NATS).
 Remove and install all control units after disconnecting both battery cables with the ignition knob in the ″LOCK ″ position.
 Always use CONSULT-III to perform self-diagnosis as a part of each function inspection after finishing work.
If DTC is detected, perform trouble diagnosis according to self-diagnostic results.
For models equipped with the Intelligent Key system and NVIS /IVIS, an electrically controlled steering lock
mechanism is adopted on the key cylinder.
For this reason, if the battery is disconnected or if the battery is discharged, the steering wheel will lock and
steering wheel rotation will become impossible.
If steering wheel rotation is required when battery pow er is interrupted, follow the procedure below before
starting the repair operation.
OPERATION PROCEDURE
1. Connect both battery cables. NOTE:
Supply power using jumper cables if battery is discharged.
2. Use the Intelligent Key or mechanical key to turn the ignition switch to the ″ACC ″ position. At this time, the
steering lock will be released.
3. Disconnect both battery cables. The steering lock will remain released and the steering wheel can be
rotated.
4. Perform the necessary repair operation.
5. When the repair work is completed, return the ignition switch to the ″LOCK ″ position before connecting
the battery cables. (At this time, the steering lock mechanism will engage.)
6. Perform a self-diagnosis check of all control units using CONSULT-III.
Precaution for Drain Engine Coolant and Engine OilINFOID:0000000001325752
Drain engine coolant and engine oil when engine is cooled.
Precaution for Disconnecting Fuel PipingINFOID:0000000001325753
 Before starting work, make sure no fire or spark producing items are in the work area.
 Release fuel pressure before disconnecting and disassembly.
 After disconnecting pipes, plug openings to stop fuel leakage.
Precaution for Removal and DisassemblyINFOID:0000000001325754
 When instructed to use SST, use specified tools. Always be careful to work safely, avoid forceful or unin-
structed operations.
 Exercise maximum care to avoid damage to mating or sliding surfaces.
 Cover openings of engine system with tape or the equival ent, if necessary, to seal out foreign materials.
 Mark and arrange disassembly parts in an organi zed way for easy troubleshooting and assembly.
 When loosening nuts and bolts, as a basic rule, star t with the one furthest outside, then the one diagonally
opposite, and so on. If the order of loosening is specified, do exactly as specified. Power tools may be used
where noted in the step.
Precaution for Inspection, Repair and ReplacementINFOID:0000000001325755
Before repairing or replacing, thoroughly inspect parts. Inspect new replacement parts in the same way, and
replace if necessary.
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