2007 NISSAN 350Z service

EM-94
CYLINDER HEAD
Revision: 2006 November2007 350Z
Disassembly and AssemblyNBS00010

Refer to GI-11, "Components" for symbol marks in the figure.
DISASSEMBLY
1. Remove spark plug with spark plug wrench (commercial service tool).
2. Remove valve lifter.

Identify installation positions, and store them without mixing them up.
3. Remove valve collet.

Compress valve spring with valve spring compressor, attach-
ment and adapter (SST). Remove valve collet with magnet
hand.
CAUTION:
When working, take care not to damage valve lifter holes.
4. Remove valve spring retainer, valve spring and valve spring seat.
5. Push valve stem to combustion chamber side, and remove valve.

Identify installation positions, and store them without mixing them up.
1. Valve lifter 2. Valve collet 3. Valve spring retainer
4. Valve spring 5. Valve oil seal 6. Valve spring seat
7. Valve guide 8. Spark plug 9. Spark plug tube
10. Cylinder head (right bank) 11. Valve seat 12. Valve (EXH)
13. Valve (INT) 14. Cylinder head (left bank)
PBIC5013E
PBIC1803E

EM-96
CYLINDER HEAD
Revision: 2006 November2007 350Z
8. Install valve collet.

Compress valve spring with valve spring compressor, attach-
ment and adapter (SST). Install valve collet with 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 liquid gasket adhering to cylinder head mounting hole.
b. Apply liquid gasket 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-45, "
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 DisassemblyNBS00011
VALVE DIMENSIONS

Check dimensions of each valve. For dimensions, refer to EM-
139, "Valve Dimensions" .

If dimensions are out of the standard, replace valve and check
valve seat contact. Refer to EM-99, "
VALVE SEAT CONTACT" .
PBIC1803E
Standard press-fit height “H”:
: 37.7 - 38.7 mm (1.484 - 1.524 in)
PBIC2638E
SEM188A

CYLINDER HEAD
EM-97
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Revision: 2006 November2007 350Z
VALVE GUIDE CLEARANCE
Valve Stem Diameter
Measure diameter of valve stem with micrometer.
Valve Guide Inner Diameter
Measure inner diameter of valve guide with inside micrometer.
Valve Guide Clearance
(Valve guide clearance) = (Valve guide inner diameter) – (Valve stem diameter)

If it exceeds the limit, replace valve and/or valve guide. When valve guide must be replaced, refer to EM-
97, "VALVE GUIDE REPLACEMENT" .
VALVE GUIDE REPLACEMENT
When valve guide is removed, replace with Oversize (Service) [0.2 mm (0.008 in)] valve guide.
1. To remove valve guide, heat cylinder head to 110 to 130°C (230
to 266°F) by soaking in heated oil.
2. Drive out valve guide with a press [under a 20 kN (2 ton, 2.2 US
ton, 2.0 lmp ton) pressure] or hammer and suitable tool.
WARNING:
Cylinder head contains heat. When working, wear protec-
tive equipment to avoid getting burned.Standard
Intake : 5.965 - 5.980 mm (0.2348 - 0.2354 in)
Exhaust : 5.962 - 5.970 mm (0.2347 - 0.2350 in)
SEM938C
Standard
Intake and Exhaust : 6.000 - 6.018 mm (0.2362 - 0.2369 in)
Valve guide clearance:
Standard
Intake : 0.020 - 0.053 mm (0.0008 - 0.0021 in)
Exhaust : 0.030 - 0.056 mm (0.0012 - 0.0022 in)
Limit
Intake : 0.08 mm (0.0031 in)
Exhaust : 0.09 mm (0.0035 in)
SEM008A
SEM931C

EM-98
CYLINDER HEAD
Revision: 2006 November2007 350Z
3. Using valve guide reamer (commercial service tool), ream cylin-
der head valve guide hole.
4. Heat cylinder head to 110 to 130°C (230 to 266°F) by soaking in
heated oil.
5. Using valve guide drift (commercial service tool), press valve
guide from camshaft side to the dimensions as in the figure.
WARNING:
Cylinder head contains heat. When working, wear protec-
tive equipment to avoid getting burned.
6. Using valve guide reamer (commercial service tool), apply
reamer finish to valve guide.Valve guide hole diameter (for service parts):
Intake and exhaust
: 10.175 - 10.196 mm (0.4006 - 0.4014 in)
SEM932C
SEM008A
Projection “L”
Intake and exhaust
: 12.6 - 12.8 mm (0.496 - 0.504 in)
SEM950E
Standard:
Intake and exhaust
: 6.000 - 6.018 mm (0.2362 - 0.2369 in)
SEM932C

CYLINDER HEAD
EM-99
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Revision: 2006 November2007 350Z
VALVE SEAT CONTACT

After confirming that the dimensions of valve guides and valves
are within the specifications, perform this procedure.

Apply prussian blue (or white lead) onto contacting surface of
valve seat to check the condition of the valve contact on the sur-
face.

Check if the contact area band is continuous all around the cir-
cumference.

If not, grind to adjust valve fitting and check again. If the contact-
ing surface still has “NG” conditions even after the re-check,
replace valve seat. Refer to EM-99, "
VALVE SEAT REPLACE-
MENT" .
VALVE SEAT REPLACEMENT
When valve seat is removed, replace with Oversize (Service) [0.5 mm (0.020 in)] valve seat.
1. Bore out old seat until it collapses. Boring should not continue beyond the bottom face of the seat recess
in cylinder head. Set the machine depth stop to ensure this. Refer to EM-141, "
Va l v e S e a t" .
CAUTION:
Prevent to scratch cylinder head by excessive boring.
2. Ream cylinder head recess diameter for service valve seat.

Be sure to ream in circles concentric to valve guide center.
This will enable valve to fit correctly.
3. Heat cylinder head to 110 to 130°C (230 to 266°F) by soaking in
heated oil.
4. Provide valve seats cooled well with dry ice. Force fit valve seat into cylinder head.
WARNING:

Avoid directly touching cold valve seats.

Cylinder head contains heat. When working, wear protective equipment to avoid getting burned.
5. Using valve seat cutter set (commercial service tool) or valve
seat grinder, finish seat to the specified dimensions. Refer to
EM-141, "
Valve Seat" .
CAUTION:
When using valve seat cutter, firmly grip cutter handle with
both hands. Then, press on the contacting surface all
around the circumference to cut in a single drive. Improper
pressure on with cutter or cutting many different times may
result in stage valve seat.
SBIA0322E
Oversize (Service) [0.5 mm (0.020 in)]
Intake : 38.500 - 38.516 mm (1.5157 - 1.5164 in)
Exhaust : 32.100 - 32.116 mm (1.2638 - 1.2644 in)
SEM795A
SEM008A
SEM934C

ENGINE ASSEMBLY
EM-103
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Revision: 2006 November2007 350Z
1. Remove passenger-side kicking plate inner, dash side finisher, and instrument passenger panel lower.
Refer to EI-35, "
BODY SIDE TRIM" and IP-10, "INSTRUMENT PANEL ASSEMBLY" .
2. Disconnect engine room harness connectors at unit sides TCM
(A/T models), ECM and other.
3. Disengage intermediate fixing point. Pull out engine room harnesses to engine room side, and temporarily
secure them on engine.
CAUTION:

When pulling out harnesses, take care not to damage harnesses and connectors.

After temporarily securing, cover connectors with vinyl or similar material to protect against for-
eign material adhesion.
Vehicle Underbody
1. Remove exhaust front tube. Refer to EX-3, "EXHAUST SYSTEM" .
2. Disconnect steering lower joint at power steering gear assembly side, and release steering lower shaft.
Refer to PS-10, "
STEERING COLUMN" .
3. Remove propeller shaft. Refer to PR-5, "
REAR PROPELLER SHAFT" .
CAUTION:
Do not impact or damage propeller shaft tube.
4. Disengage shift lever and remove clutch tube (M/T models). Refer to MT-18, "
TRANSMISSION ASSEM-
BLY" and CL-15, "CLUTCH PIPING" .
5. Disengage A/T control rod at control device assembly side. Then, temporarily secure it on transmission,
so that it does not sag (A/T models). Refer to AT- 2 0 4 , "
SHIFT CONTROL SYSTEM" .
6. Remove rear plate cover from oil pan (upper). Then remove bolts fixing drive plate to torque converter
(A/T models). Refer to EM-26, "
OIL PAN AND OIL STRAINER" and AT- 2 4 2 , "TRANSMISSION ASSEM-
BLY" .
7. Remove bolts fixing transmission to lower rear side of oil pan (upper). Refer to MT-18, "
TRANSMISSION
ASSEMBLY" (M/T models) or AT- 2 4 2 , "TRANSMISSION ASSEMBLY" (A/T models).
8. Remove front stabilizer. Refer to FSU-18, "
STABILIZER BAR" .
9. Separate steering outer sockets from steering knuckle. Refer to PS-17, "
POWER STEERING GEAR AND
LINKAGE" .
10. Separate transverse links from suspension member and vehicle body. Refer to FSU-13, "
TRANSVERSE
LINK" .
Removal Work
1. Use a manual lift table caddy (commercial service tool) or equiv-
alently 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.
2. Remove front cross bar. Refer to FSU-5, "
FRONT SUSPENSION ASSEMBLY" .
PBIC0883E
PBIC0804E

EM-110
CYLINDER BLOCK
Revision: 2006 November2007 350Z

Use 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.
17. Remove piston from connecting rod as follows:
a. Using snap ring pliers, remove snap ring.
b. Heat piston to 60 to 70°C (140 to 158°F) with industrial use drier
or equivalent.
c. Push out piston pin with stick of outer diameter approximately 20
mm (0.79 in).
18. Remove lower cylinder block bolts.
NOTE:
Use TORX socket (size E14).

Before loosening lower cylinder block bolts, measure the crankshaft end play. Refer to EM-125,
"CRANKSHAFT END PLAY" .

Loosen lower cylinder block bolts in reverse order shown in the figure in several different steps.
PBIC0087E
PBIC1638E
PBIC1639E
PBIC0262E

EM-114
CYLINDER BLOCK
Revision: 2006 November2007 350Z
e. Turn lower cylinder block bolts (No.1 to 16) 90 degrees clock-
wise (angle tightening).
CAUTION:
Use the angle wrench [SST: KV10112100 (BT8653-A)] (A) to
check tightening angle. Do not make judgment by visual
inspection.

After installing lower cylinder block bolts, make sure that crankshaft can be rotated smoothly by hand.

Check the crankshaft end play. Refer to EM-125, "CRANKSHAFT END PLAY" .
9. Install piston to connecting rod as follows:
a. Using snap ring pliers, install new snap ring to the groove of piston rear side.

Insert it fully into groove to install.
b. Install piston to connecting rod.

Using industrial use drier or similar tool, heat piston until piston pin can be pushed in by hand without
excess force [approx. 60 to 70°C (140 to 158°F)]. From the front to the rear, insert piston pin into piston
and connecting rod.

Assemble so that the front mark on the piston head and the
cylinder number on connecting rod are positioned as shown in
the figure.
c. Install new snap ring to the groove of the piston front side.

Insert it fully into groove to install.

After installing, make sure that connecting rod moves smoothly.
10. Using piston ring expander (commercial service tool), install pis-
ton rings.
CAUTION:

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

Be careful not to damage piston rings by expending them
excessively.
PBIC5018E
A : Piston grade number
B : Front mark
C : Pin grade number
D : Cylinder number
E : Front mark
: Engine front
PBIC5049E
PBIC0087E