2006 INFINITI M35 light

EM-6
[VQ35DE]
PRECAUTIONS
Revision: 2006 January2006 M35/M45
Dowel pins are used for several parts alignment. When replacing and reassembling parts with dowel pins,
make sure that dowel pins are installed in the original position.
Cover openings of engine system with a tape or equivalent, if necessary, to seal out foreign materials.
Mark and arrange disassembly parts in an organized way for easy troubleshooting and re-assembly.
When loosening nuts and bolts, as a basic rule, start 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 in the step.
Precautions for Inspection, Repair and ReplacementNBS004MK
Before repairing or replacing, thoroughly inspect parts. Inspect new replacement parts in the same way, and
replace if necessary.
Precautions for Assembly and InstallationNBS004ML
Use torque wrench to tighten bolts or nuts to specification.
When tightening nuts and bolts, as a basic rule, equally tighten in several different steps starting with the
ones in center, then ones on inside and outside diagonally in this order. If the order of tightening is speci-
fied, do exactly as specified.
Replace with new gasket, packing, oil seal or O-ring.
Dowel pins are used for several parts alignment.When replacing and reassembling parts with dowel
pins,make sure that dowel pins are installed in the original position.
Thoroughly wash, clean, and air-blow each part. Carefully check engine oil or engine coolant passages for
any restriction and blockage.
Avoid damaging sliding or mating surfaces. Completely remove foreign materials such as cloth lint or dust.
Before assembly, oil sliding surfaces well.
Release air within route when refilling after draining engine coolant.
After repairing, start the engine and increase engine speed to check engine coolant, fuel, engine oil, and
exhaust gases for leakage.
Precautions for Angle TighteningNBS004MM
Use the angle wrench [SST: KV10112100 (BT8653-A)] for the final tightening of the following engine parts:
–Cylinder head bolts
–Main bearing cap bolts
–Connecting rod cap bolts
–Crankshaft pulley bolt
Do not use a torque value for final tightening.
The torque value for these parts are for a preliminary step.
Ensure thread and seat surfaces are clean and coated with engine oil.
Precautions for Liquid GasketNBS004MN
REMOVAL OF LIQUID GASKET SEALING
After removing mounting nuts and bolts, separate the mating
surface using the seal cutter (SST) and remove old liquid gasket
sealing.
CAUTION:
Be careful not to damage the mating surfaces.
Tap the seal cutter to insert it (1), and then slide it (2) by tapping
on the side as shown in the figure.
In areas where the seal cutter (SST) is difficult to use, use a
plastic hammer to lightly tap the parts, to remove it.
CAUTION:
If for some unavoidable reason tool such as a screwdriver
is used, be careful not to damage the mating surfaces.
PBIC0002E

PRECAUTIONS
EM-7
[VQ35DE]
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Revision: 2006 January2006 M35/M45
LIQUID GASKET APPLICATION PROCEDURE
1. Using a scraper, remove old liquid gasket adhering to the liquid
gasket application surface and the mating surface.
Remove liquid gasket completely from the groove of the liquid
gasket application surface, mounting bolts, and bolt holes.
2. Wipe the liquid gasket application surface and the mating sur-
face with white gasoline (lighting and heating use) to remove
adhering moisture, grease and foreign materials.
3. Attach liquid gasket tube to the tube presser [SST: WS39930000
(—)].
Use Genuine RTV Silicone Sealant or equivalent. Refer to
GI-48, "
RECOMMENDED CHEMICAL PRODUCTS AND
SEALANTS" .
4. Apply liquid gasket without breaks to the specified location with
the specified dimensions.
If there is a groove for liquid gasket application, apply liquid
gasket to the groove.
As for bolt holes, normally apply liquid gasket inside the
holes. Occasionally, it should be applied outside the holes.
Make sure to read the text of this manual.
Within five minutes of liquid gasket application, install the mat-
ing component.
If liquid gasket protrudes, wipe it off immediately.
Do not retighten mounting bolts or nuts after the installation.
After 30 minutes or more have passed from the installation, fill
engine oil and engine coolant.
CAUTION:
If there are specific instructions in this manual, observe
them.
PBIC0003E
EMA0622D
SEM159F

TIMING CHAIN
EM-69
[VQ35DE]
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Revision: 2006 January2006 M35/M45
31. Remove internal chain guide, tension guide and slack guide.
NOTE:
Tension guide can be removed after removing timing chain (pri-
mary).
32. Remove timing chain (primary) and crankshaft sprocket.
CAUTION:
After removing timing chain (primary), do not turn crankshaft and camshaft separately, or valves
will strike the piston heads.
33. Remove timing chain (secondary) and camshaft sprockets as follows:
a. Attach suitable stopper pin to the right and left timing chain ten-
sioners (secondary).
NOTE:
Use approximately 0.5 mm (0.02 in) dia. hard metal pin as a
stopper pin.
For removal of timing chain tensioner (secondary), refer to
EM-84, "
CAMSHAFT" . [Removing camshaft bracket (No. 1)
is required.]
b. Remove camshaft sprocket (INT and EXH) mounting bolts.
Secure the hexagonal portion of camshaft using a wrench to
loosen mounting bolts.
CAUTION:
Do not loosen the mounting bolts with securing anything
other than the camshaft hexagonal portion or with ten-
sioning the timing chain.
c. Remove timing chain (secondary) together with camshaft sprockets.
Turn camshaft slightly to secure slackness of timing chain on timing chain tensioner (secondary) side.
PBIC2266E
PBIC2047E
KBIA1698J

EM-108
[VQ35DE]
CYLINDER HEAD
Revision: 2006 January2006 M35/M45
8. Install valve collet.
Compress valve spring with the valve spring compressor, the
attachment and the adapter (SST). Install valve collet with a
magnet hand.
CAUTION:
When working, take care not to damage valve lifter holes.
Tap valve stem edge lightly with plastic hammer after installa-
tion to check its installed condition.
9. Install valve lifter.
Install it in the original position.
10. Install spark plug tube.
Press-fit spark plug tube as follows:
a. Remove old locking sealant adhering to cylinder head mounting hole.
b. Apply sealant to area within approximately 12 mm (0.47 in) from edge of spark plug tube press-fit side.
Use Genuine High Strength Locking Sealant or equivalent. Refer to GI-48, "
RECOMMENDED
CHEMICAL PRODUCTS AND SEALANTS" .
c. Using drift, press-fit spark plug tube so that its height “H” is as
specified in the figure.
CAUTION:
When press-fitting, take care not to deform spark plug
tube.
After press-fitting, wipe off liquid gasket protruding onto
cylinder-head upper face.
11. Install spark plug with spark plug wrench (commercial service tool).
Inspection after DisassemblyNBS004NV
VALVE DIMENSIONS
Check the dimensions of each valve. For the dimensions, refer to EM-154, "Valve Dimensions" .
If dimensions are out of the standard, replace valve and check valve seat contact. Refer to EM-110,
"VA LV E S E AT C O N TA C T" .
VALVE GUIDE CLEARANCE
Valve Stem Diameter
Measure the diameter of valve stem with micrometer.
Valve Guide Inner Diameter
Measure the inner diameter of valve guide with bore gauge.
PBIC1803E
Standard press-fit height “H”:
: 38.1 - 39.1 mm (1.500 - 1.539 in)
PBIC2638E
Standard
Intake : 5.965 - 5.980 mm (0.2348 - 0.2354 in)
Exhaust : 5.955 - 5.970 mm (0.2344 - 0.2350 in)
SEM938C

CYLINDER BLOCK
EM-147
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Revision: 2006 January2006 M35/M45If 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-136, "
HOW TO SELECT CONNECTING ROD 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-128, "
ASSEMBLY" for the tightening procedure.
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-128, "
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 diam-
eter and crankshaft main journal diameter to obtain the specified bearing oil clearance. Refer to EM-137,
"HOW TO SELECT MAIN 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
bearing beam to the specified torque. Refer to EM-128, "
ASSEMBLY" for the tightening procedure.
CAUTION:
Never rotate crankshaft.Standard : 0.034 - 0.059 mm (0.0013 - 0.0023 in)
(actual clearance)
Limit : 0.070 mm (0.0028 in)
PBIC1149E
Standard : 0.035 - 0.045 mm (0.0014 - 0.0018 in)
(actual clearance)
Limit : 0.065 mm (0.0026 in)
PBIC1644E

EM-164
[VK45DE]
PRECAUTIONS
Revision: 2006 January2006 M35/M45
Mark and arrange disassembly parts in an organized way for easy troubleshooting and assembly.
When loosening nuts and bolts, as a basic rule, start 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.
Precautions for Inspection, Repair and ReplacementNBS004OA
Before repairing or replacing, thoroughly inspect parts. Inspect new replacement parts in the same way, and
replace if necessary.
Precautions for Assembly and InstallationNBS004OB
Use torque wrench to tighten bolts or nuts to specification.
When tightening nuts and bolts, as a basic rule, equally tighten in several different steps starting with the
ones in center, then ones on inside and outside diagonally in this order. If the order of tightening is speci-
fied, do exactly as specified.
Replace with new gasket, packing, oil seal or O-ring.
Thoroughly wash, clean, and air-blow each part. Carefully check engine oil or engine coolant passages for
any restriction and blockage.
Guide pins are used for several parts alignment. When replacing and reassembling parts with guide pins,
make sure that guide pins are installed in the original position.
Avoid damaging sliding or mating surfaces. Completely remove foreign materials such as cloth lint or dust.
Before assembly, oil sliding surfaces well.
Release air within route when refilling after draining engine coolant.
After repairing, start engine and increase engine speed to check engine coolant, fuel, engine oil, and
exhaust gases for leakage.
Parts Requiring Angle TighteningNBS004OC
Use angle wrench [SST: KV10112100 (BT8653-A)] for the final tightening of the following engine parts:
–Cylinder head bolts
–Main bearing cap bolts
–Connecting rod cap nuts
–Crankshaft pulley bolt (No angle wrench is required as the bolt flange is provided with notches for angle
tightening)
Do not use a torque value for final tightening.
The torque value for these parts are for a preliminary step.
Ensure thread and seat surfaces are clean and coated with engine oil.
Precautions for Liquid GasketNBS004OD
REMOVAL OF LIQUID GASKET SEALING
After removing mounting nuts and bolts, separate the mating
surface using seal cutter (SST) and remove old liquid gasket
sealing.
CAUTION:
Be careful not to damage the mating surfaces.
Tap seal cutter to insert it (1), and then slide it (2) by tapping on
the side as shown in the figure.
In areas where seal cutter (SST) is difficult to use, use plastic
hammer to lightly tap the parts, to remove it.
CAUTION:
If for some unavoidable reason tool such as screwdriver is
used, be careful not to damage the mating surfaces.
PBIC0002E

PRECAUTIONS
EM-165
[VK45DE]
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EM
Revision: 2006 January2006 M35/M45
LIQUID GASKET APPLICATION PROCEDURE
1. Using scraper, remove old liquid gasket adhering to the liquid
gasket application surface and the mating surface.
Remove liquid gasket completely from the groove of the liquid
gasket application surface, mounting bolts, and bolt holes.
2. Wipe the liquid gasket application surface and the mating sur-
face with white gasoline (lighting and heating use) to remove
adhering moisture, grease and foreign materials.
3. Attach liquid gasket tube to tube presser [SST: WS39930000
(—)].
Use Genuine RTV Silicone Sealant or equivalent. Refer to
GI-48, "
RECOMMENDED CHEMICAL PRODUCTS AND
SEALANTS" .
4. Apply liquid gasket without breaks to the specified location with
the specified dimensions.
If there is a groove for the liquid gasket application, apply liq-
uid gasket to the groove.
As for the bolt holes, normally apply liquid gasket inside the
holes. Occasionally, it should be applied outside the holes.
Make sure to read the text of this manual.
Within five minutes of liquid gasket application, install the mat-
ing component.
If liquid gasket protrudes, wipe it off immediately.
Do not retighten mounting bolts and nuts after the installation.
Wait 30 minutes or more after installation before refilling engine with engine oil and engine coolant.
CAUTION:
If there are specific instructions in this manual, observe them.
PBIC0003E
EMA0622D
SEM159F

TIMING CHAIN
EM-207
[VK45DE]
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Revision: 2006 January2006 M35/M45
NOTE:
To remove timing chain and related parts, start with those on left bank. The procedure for removing parts
on right bank is omitted because it is the same as that for left bank.
a. Press tab in the direction of arrow (or turn lever in the direction
of arrow) to unlock the locking with the groove that stops ten-
sioner plunger from returning.
Lightly press tensioner plunger to release the tension of
spring for this operation.
b. Push in tensioner plunger to align the hole on lever and that on
pump main body.
Pushing in tensioner too far does not allow the holes to align.
Therefore, push in plunger to the degree at which the start of
stopper groove and tab engages.
c. Insert stopper pin [hard wire with approx. 0.5 mm (0.020 in)
diameter or similar tool] to fix plunger. With plunger fixed, remove chain tensioner.
17. Remove chain tension guide and timing chain slack guide.
18. Remove timing chain and crankshaft sprocket.
CAUTION:
After removing timing chain, do not turn crankshaft and camshaft separately, or valves will strike
the piston head.
19. With hexagonal part of camshaft locked with wrench, loosen
mounting bolts securing camshaft sprocket to remove camshaft
sprocket.
CAUTION:
Do not loosen mounting bolts with securing anything other
than the camshaft hexagonal portion or with tensioning the
timing chain.
20. Perform same procedure as for left bank, remove timing chain and related parts on right side.
21. Use scraper to remove all traces of old liquid gasket from front cover and opposite mating surfaces.
Remove oil liquid gasket from bolt hole and thread.
22. Use scraper to remove all trace of liquid gasket from chain tensioner cover and intake valve timing control
covers.
PBIC2343E
PBIC0030E
PBIC2084E