Infiniti Q45 (FY33). Manual — part 413

SEM416FC

GI

MA

LC

EC

FE

AT

PD

FA

RA

BR

ST

RS

BT

HA

EL

IDX

TIMING CHAIN

EM-13

POSITION FOR APPLYING LIQUID GASKET

Refer to “Installation” in “OIL PAN” for installing oil pan (EM-12).

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Before installation, wipe off the protruding sealant.

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TIMING CHAIN

EM-14

CAUTION:

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After removing timing chain, do not turn crankshaft and
camshaft separately, or valves will strike piston heads.

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When installing camshafts, chain tensioners, oil seals, or
other sliding parts, lubricate contacting surfaces with new
engine oil.

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Apply new engine oil to bolt threads and seat surfaces
when installing cylinder head, camshaft sprockets, crank-
shaft pulley, and camshaft brackets.

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Before disconnecting fuel hose, release fuel pressure.
Refer to EC section (“Fuel Pressure Release”, “BASIC
SERVICE PROCEDURE”).

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Do not spill engine coolant on drive belts.

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Removal

1.

Remove engine assembly from vehicle. Refer to “ENGINE
REMOVAL” (EM-43).

2.

Remove the following parts.

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Engine mounts

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Alternator

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Air conditioner compressor

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Exhaust manifold

3.

Place engine assembly on stand.

4.

Remove intake manifold collector.

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5.

Disconnect injector harness connector and remove fuel tube
assembly with injector.

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Do not disassemble fuel hose.

6.

Remove intake manifold.

7.

Remove rocker cover. Refer to “CYLINDER HEAD” (EM-30).

SEM257G

8.

Set No. 1 piston at TDC on its compression stroke.
Align the timing mark on crankshaft pulley with timing indica-
tor on front cover.

GI

MA

LC

EC

FE

AT

PD

FA

RA

BR

ST

RS

BT

HA

EL

IDX

TIMING CHAIN

EM-15

SEM468F

Make sure the intake camshaft lobe for the No. 1 cylinder faces the
intake port and the exhaust lobe faces the exhaust port.
Reference:
It is possible to confirm camshaft positions by checking notch posi-
tions on the camshaft when No. 1 piston is at TDC of the compres-
sion stroke. This is the position where cylinder head bolts can be
removed.

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9.

Remove crankshaft pulley.

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Do not remove the crankshaft pulley balance weight.

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Do not disassemble the crankshaft pulley.

10. Remove camshaft position sensor assembly.

Do not disassemble camshaft position sensor unit.

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11. Remove front cover upper.

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Loosen bolts and nuts in the numerical order shown in the fig-
ure and then remove them.

TIMING CHAIN

Removal (Cont’d)

EM-16