Infiniti M45 (Y34). Manual - part 527

 

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Infiniti M45 (Y34). Manual - part 527

 

 

TIMING CHAIN

EM-45

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NOTE:
Before installing chain tensioner, it is possible to change the position of mating mark on timing chain for
that on each sprocket for alignment. 

Install chain slack guides and chain tension guides onto correct side by checking with identification
mark on surface.

Install chain tensioner with plunger fixed as described in its removal. 

CAUTION:

Before and after the installation of chain tensioner, make sure that the mating mark on timing
chain is not out of alignment.

After installing chain tensioner, remove stopper pin to release tensioner. Check that tensioner is
released.

To avoid chain-link skipping of timing chain, never move crankshaft or camshafts until front
cover is installed.

5.

In the same way as for right bank, install timing chain and associated parts on left side.

6.

Install oil pump assembly.

7.

Install oil pump drive spacer as follows:

a.

Insert oil pump drive spacer according to the directions of crank-
shaft key and the two flat surfaces of oil pump inner rotor. 

If the positional relationship does not allow the insertion,
rotate oil pump inner rotor with a finger to allow the spacer.

b.

After confirming that the position of each part is in correct condi-
tion to allow for the spacer, force fit the spacer by lightly tapping
with a plastic hammer until it contacts and does not go further. 

8.

Install front oil seal onto front cover. 

Install new oil seal in the direction shown in the figure.

CAUTION:

Be careful not to scratch or make burrs on circumference
of oil seal.

Using the front oil seal drift (commercial service tool) or drift
with 54 mm (2.13 in) diameter, force fit front oil seal until it lev-
els with the front end surface of front cover.

9.

Install chain tensioner cover onto front cover.

PBIC0058E

SEM715A

PBIC0059E

EM-46

TIMING CHAIN

Apply liquid gasket as shown in the figure.

Use Genuine RTV Silicone Sealant or equivalent. Refer to

GI-46, "RECOMMENDED CHEMICAL PRODUCTS AND
SEALANTS"

 . 

10. Install front cover as follows:

a.

Install new O-rings onto right and left cylinder heads and cylin-
der block.

b.

Apply liquid gasket as shown in the figure.
Use Genuine RTV Silicone Sealant or equivalent. Refer to

GI-46, "RECOMMENDED CHEMICAL PRODUCTS AND
SEALANTS"

.

c.

Check again that the timing mating mark on timing chain and
that on each sprocket are aligned. Then, install front cover.

CAUTION:

Be careful to avoid interference with the front end of oil
pump drive spacer. Such interference may damage front oil
seal.

d.

Tighten fixing bolts in the numerical order shown in the figure.

There are four types of mounting bolts.

SBIA0372E

SBIA0373E

PBIC0062E

KBIA0354J

PBIC0063E

TIMING CHAIN

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e.

After tightening, re-tighten to the specified torque.

CAUTION:

Be sure to wipe off any excessive liquid gasket leaking onto surface mating with oil pan.

11. Install intake valve timing control cover as follows:
a.

At the back of intake valve timing control cover, install new seal rings (three for each bank) to the area to
be inserted into camshaft sprocket (INT).

CAUTION:

Do not spread seal ring excessively to avoid breaks and deformation.

b.

On the side of front cover, install new O-ring (one for each
bank).

c.

Apply liquid gasket as shown in the figure.
Use Genuine RTV Silicone Sealant or equivalent. Refer to

GI-46, "RECOMMENDED CHEMICAL PRODUCTS AND
SEALANTS"

.

d.

Tighten fixing bolts in the numerical order shown in the figure.

12. Install intake valve timing control position sensor, intake valve timing control solenoid valve and camshaft

position sensor (PHASE) to intake valve timing control cover and front cover.

Be sure to tighten bolts with flanges completely seated.

13. Install crankshaft pulley as follows:

a.

Fix crankshaft with ring gear stopper (SST: J-45476).

b.

Install crankshaft pulley, taking care not to damage front oil seal.

Install according to dowel pin of oil pump drive spacer.

Lightly tapping its center with plastic hammer, insert pulley.

CAUTION:

Do not tap pulley on the side surface where belt is installed (outer circumference).

c.

Apply engine oil onto threaded parts of bolts and seating areas.

d.

Tighten crankshaft pulley bolt.

SBIA0374E

SBIA0375E

PBIC0051E

EM-48

TIMING CHAIN

e.

Select one most visible notch of the four on bolt flange. Corre-
sponding to the selected notch, put a mating mark (such as
paint) on crankshaft pulley. 

f.

Tighten further by 90 degrees. (Angle tightening)

Check the tightening angle by referencing to the notches. The
angle between two notches is 90 degrees.

14. Rotate crankshaft pulley in normal direction (clockwise when viewed from engine front) to check for inter-

ference among parts.

15. Install in the reverse order of removal.

NOTE:
If hydraulic pressure inside timing chain tensioner drops after removal/installation, slack in guide may gen-
erate a pounding noise during and just after engine start. However, this does not indicate an unusualness.
Noise will stop after hydraulic pressure rises.

INSPECTION AFTER INSTALLATION

Before starting engine, check the levels of engine coolant, engine oil and working fluid. If less than
required quantity, fill to the specified level.

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.

Warm up engine thoroughly to make sure there is no leakage of engine coolant, engine oil, working fluid,
fuel and exhaust gas.

Bleed air from passages in pipes and tubes of applicable lines, such as in cooling system.

After cooling down engine, again check amounts of engine coolant, engine oil and working fluid. Refill to
specified level, if necessary.

Summary of the inspection items:

 : 93.1 N·m (9.5 kg-m, 69 ft-lb)

PBIC2346E

Item

Before starting engine

Engine running

After engine stopped

Engine coolant

Level

Leakage

Level

Engine oil

Level

Leakage

Level

Working fluid

Level

Leakage

Level

Fuel

Leakage

Exhaust gas

Leakage

 

 

 

 

 

 

 

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