2007 NISSAN 350Z Engine Mechanical Workshop Manual

CAMSHAFT
EM-73
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Revision: 2006 November2007 350Z
2. Remove fuel sub tube. Refer to EM-34, "FUEL INJECTOR AND FUEL TUBE" .
3. Remove camshaft sensor bracket bolts in reverse order as
shown in the figure.
4. Remove intake and exhaust camshaft brackets.

Mark camshafts, camshaft brackets and bolts so they are placed in the same position and direction for
installation.

Equally loosen camshaft bracket bolts in several steps in
reverse order as shown in the figure.
5. Remove camshaft.
6. Remove valve lifter.

Identify installation positions, and store them without mixing them up.
7. Remove timing chain tensioner (secondary) (1) from cylinder
head.

Remove timing chain tensioner (secondary) (1) with its stop-
per pin (C) attached.
NOTE:
Stopper pin (C) was attached when timing chain (secondary)
was removed.
: Engine front
PBIC5054E
PBIC2050E
A : Right bank
B : Left bank
PBIC5045E

EM-74
CAMSHAFT
Revision: 2006 November2007 350Z
INSPECTION AFTER REMOVAL
Camshaft Runout
1. Put V-block on precise flat table, and support No. 2 and 4 jour-
nals of camshaft.
CAUTION:
Do not support journal No. 1 (on the side of camshaft
sprocket) because it has a different diameter from the other
three locations.
2. Set dial indicator vertically to No. 3 journal.
3. Turn camshaft to one direction with hands, and measure the
camshaft runout on a dial indicator. (Total indicator reading)
4. If it exceeds the limit, replace camshaft.
Camshaft Cam Height
1. Measure the camshaft cam height with a micrometer.
2. If wear is beyond the limit, replace camshaft.
Camshaft Journal Oil Clearance
CAMSHAFT JOURNAL DIAMETER

Measure the outer diameter of camshaft journal with a microme-
ter.
CAMSHAFT BRACKET INNER DIAMETER

Tighten camshaft bracket bolt with the specified torque. Refer to EM-77, "INSTALLATION" for the tighten-
ing procedure.

Measure the inner diameter “A” of camshaft bracket with a bore
gauge.Standard : Less than 0.02 mm (0.0008 in)
Limit : 0.05 mm (0.0020 in)
PBIC0929E
Standard cam height:
Intake : 45.865 – 46.055 mm (1.8057 – 1.8132 in)
Exhaust : 45.875 – 46.065 mm (1.8061 – 1.8136 in)
Cam wear limit
: 0.2 mm (0.008 in)
EMQ0072D
Standard:
No. 1 : 25.935 - 25.955 mm (1.0211 - 1.0218 in)
No. 2, 3, 4 : 23.445 - 23.465 mm (0.9230 - 0.9238 in)
PBIC0040E
Standard:
No. 1 : 26.000 - 26.021 mm (1.0236 - 1.0244 in)
No. 2, 3, 4 : 23.500 - 23.521 mm (0.9252 - 0.9260 in)
PBIC1645E

CAMSHAFT
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Revision: 2006 November2007 350Z
CAMSHAFT JOURNAL OIL CLEARANCE

(Oil clearance) = (Camshaft bracket inner diameter) – (Camshaft journal diameter)

If it exceeds the limit, replace either or both camshaft and cylinder head.
NOTE:
Camshaft brackets cannot be replaced as single parts, because there are machined together with cylinder
head. Replace whole cylinder head assembly.
Camshaft End Play

Install a dial indicator in thrust direction on front end of camshaft.
Measure the end play of a dial indicator when camshaft is
moved forward/backward (in direction to axis).

Measure the following parts if out of the limit.
–Dimension “A” for camshaft No. 1 journal
–Dimension “B” for cylinder head No. 1 journal bearing

Refer to the standards above, and then replace camshaft and/or
cylinder head.
Camshaft Sprocket Runout
1. Put V-block on precise flat table, and support No. 2 and 4 journal of camshaft.
CAUTION:
Do not support journal No. 1 (on the side of camshaft sprocket) because it has a different diameter
from the other three locations.
2. Measure the camshaft sprocket runout with a dial indicator.
(Total indicator reading)

If it exceeds the limit, replace camshaft sprocket.
CAUTION:
When replacing camshaft sprocket (EXH), replace valve
timing control cover (including magnet retarder and cover). Standard:
No. 1 : 0.045 - 0.086 mm (0.0018 - 0.0034 in)
No. 2, 3, 4 : 0.035 - 0.076 mm (0.0014 - 0.0030 in)
Limit : 0.15 mm (0.0059 in)
Standard : 0.115 - 0.188 mm (0.0045 - 0.0074 in)
Limit : 0.24 mm (0.0094 in)
SEM864E
Standard : 27.500 - 27.548 mm (1.0827 - 1.0846 in)
Standard : 27.360 - 27.385 mm (1.0772 - 1.0781 in)
KBIA2404J
Limit : 0.15 mm (0.0059 in)
PBIC0930E

EM-76
CAMSHAFT
Revision: 2006 November2007 350Z
Valve Lifter
Check if surface of valve lifter has any wear or cracks.

If anything above is found, replace valve lifter. Refer to EM-138,
"Available Valve Lifter" .
Valve Lifter Clearance
VALVE LIFTER OUTER DIAMETER

Measure the outer diameter at 1/2 height of valve lifter with a
micrometer since valve lifter is in barrel shape.
VALVE LIFTER HOLE DIAMETER

Measure the inner diameter of valve lifter hole of cylinder head
with an inside micrometer.
VALVE LIFTER CLEARANCE

(Valve lifter clearance) = (Valve lifter hole diameter) – (Valve lifter outer diameter)

If the calculated value is out of the standard, referring to each standard of valve lifter outer diameter and
valve lifter hole diameter, replace either or both valve lifter and cylinder head.
KBIA0182E
Standard (Intake and exhaust)
: 33.980 – 33.990 mm (1.3378 – 1.3382 in)
JEM798G
Standard (Intake and exhaust)
: 34.000 - 34.016 mm (1.3386 - 1.3392 in)
SEM867E
Standard (Intake and exhaust)
: 0.010 – 0.036 mm (0.0004 – 0.0014 in)

CAMSHAFT
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Revision: 2006 November2007 350Z
INSTALLATION
1. Install timing chain tensioners (secondary) (1) on both sides of
cylinder head.

Install timing chain tensioner with its stopper pin (C) attached.

Install timing chain tensioner with sliding part facing down-
ward on right-side cylinder head, and with sliding part facing
upward on left-side cylinder head.
2. Install valve lifter.

Install it in the original position.
3. Install camshafts.

Follow your identification marks made during removal, or fol-
low the identification marks that are present on new cam-
shafts for proper placement and direction.

Install camshaft so that and dowel pin (A) on front end face
are positioned as shown in the figure. (No. 1 cylinder TDC on
its compression stroke)
NOTE:
Though camshaft does not stop at the portion as shown in the
figure, for the placement of cam nose, it is generally accepted
camshaft is placed for the same direction of the figure.
A : Right bank
B : Left bank
PBIC5045E
: Engine front
Bank INT/EXHDowel
pin (1)Paint marks
Identification
mark (D)
M1 (E) M2 (F) M3 (C)
RHINT (A) Yes Green No Light blue 1E
EXH (B) Yes No Green Light blue 1F
LHINT (A) Yes Green No Light blue 1G
EXH (B) Yes No Green Light blue 1H
PBIC5009E
1 : Crankshaft key
PBIC5010E

EM-78
CAMSHAFT
Revision: 2006 November2007 350Z
4. Install camshaft brackets.

Remove foreign material completely from camshaft bracket
backside and from cylinder head installation face.

Install camshaft bracket in original position and direction as
shown in the figure.

Install camshaft brackets (No. 2 to 4) aligning the stamp
marks as shown in the figure.
NOTE:
There are no identification marks indicating left and right for
camshaft bracket (No. 1).

Apply liquid gasket to mating surface of camshaft bracket (No.
1) as shown on right and left banks.
Use Genuine RTV Silicone Sealant or equivalent. Refer to
GI-45, "
RECOMMENDED CHEMICAL PRODUCTS AND
SEALANTS" .
PBIC2051E
PBIC2052E
a : 8.5 mm (0.335 in)
b: 2 mm
c : Clearance 5 mm (0.20 in)
d: φ 2.5 mm (0.098 in)
PBIC5162E

CAMSHAFT
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Revision: 2006 November2007 350Z
5. Tighten camshaft bracket bolts in the following steps, in numeri-
cal order as shown in the figure.
a. Tighten No. 7 to 10 in numerical order as shown.
b. Tighten No. 1 to 6 in numerical order as shown.
c. Tighten No. 1 to 10 in numerical order as shown.
d. Tighten No. 1 to 10 in numerical order as shown.
CAUTION:
After tightening mounting bolts of camshaft brackets (No.
1), be sure to wipe off excessive liquid gasket from the
parts list below.

Mating surface of rocker cover

Mating surface of rear timing chain case
6. Inspect and adjust the valve clearance. Refer to EM-80, "
Valve Clearance" .
7. Install camshaft sensor bracket.

Tighten camshaft sensor bracket bolts in numerical order as
shown in the figure.
8. Install in the reverse order of removal after this step.
INSPECTION AFTER INSTALLATION
Inspection of Camshaft Sprocket (INT) Oil Groove
CAUTION:

Perform this inspection only when DTC P0011 or P0021 are detected in self-diagnostic results of
CONSULT-III and it is directed according to inspection procedure of EC section. Refer to EC-81,
"TROUBLE DIAGNOSIS" .

Check when engine is cold so as to prevent burns from any splashing engine oil.
1. Check the engine oil level. Refer to LU-6, "
ENGINE OIL" .
2. Perform the following procedure so as to prevent the engine from being unintentionally started while
checking.
a. Release fuel pressure. Refer to EC-79, "
FUEL PRESSURE RELEASE" .
b. Disconnect ignition coil and injector harness connectors.
3. Remove intake valve timing control solenoid valve. Refer to EM-72, "
CAMSHAFT" . : 1.96 N·m (0.2 kg-m, 17 in-lb)
: 1.96 N·m (0.2 kg-m, 17 in-lb)
: 5.88 N·m (0.6 kg-m, 52 in-lb)
: 10.4 N·m (1.1 kg-m, 92 in-lb)
PBIC2050E
: Engine front
PBIC5054E

EM-80
CAMSHAFT
Revision: 2006 November2007 350Z
4. Crank the engine, and then make sure that engine oil comes out
from valve timing control solenoid valve hole. End crank after
checking.
WARNING:
Be careful not to touch rotating parts (drive belts, idler pul-
ley, and crankshaft pulley, etc.).
CAUTION:
Engine oil may squirt from intake valve timing control sole-
noid valve installation hole during cranking. Use a shop
cloth to prevent the engine components and the vehicle. Do not allow engine oil to get on rubber
components such as drive belt or engine mount insulators. Immediately wipe off any splashed
engine oil.

Clean oil groove between oil strainer and intake valve timing control solenoid valve if engine oil does not
come out from valve timing control solenoid valve hole. Refer to LU-4, "
LUBRICATION SYSTEM" .
5. Remove components between intake valve timing control solenoid valve and camshaft sprocket (INT),
and then check each oil groove for clogging.

Clean oil groove if necessary. Refer to LU-4, "LUBRICATION SYSTEM" .
6. After inspection, install removed parts.
Inspection for Leaks
The following are procedures for checking fluids leak, lubricates leak and exhaust gases leak.

Before starting engine, check oil/fluid levels including engine coolant and engine oil. If less than required
quantity, fill to the specified level. Refer to MA-11, "
RECOMMENDED FLUIDS AND LUBRICANTS" .

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.
NOTE:
If hydraulic pressure inside timing chain tensioner drops after removal/installation, slack in the guide may
generate a pounding noise during and just after engine start. However, this is normal. Noise will stop after
hydraulic pressure rises.

Warm up engine thoroughly to make sure there is no leakage of fuel, exhaust gases, or any oil/fluids
including engine oil and engine coolant.

Bleed air from lines and hoses of applicable lines, such as in cooling system.

After cooling down engine, again check oil/fluid levels including engine oil and engine coolant. Refill to the
specified level, if necessary.
Summary of the inspection items:
* Transmission/transaxle/CVT fluid, power steering fluid, brake fluid, etc.
Valve ClearanceNBS0000U
INSPECTION
Perform inspection as follows after removal, installation or replacement of camshaft or valve-related parts, or if
there is unusual engine conditions regarding valve clearance.
1 : Valve timing control solenoid valve
: Engine front
PBIC5141E
Items Before starting engine Engine running After engine stopped
Engine coolant Level Leakage Level
Engine oil Level Leakage Level
Other oils and fluid* Level Leakage Level
Fuel Leakage Leakage Leakage
Exhaust gases — Leakage —