Nissan Pathfinder (2011 year). Manual - part 369

TIMING CHAIN

EM-63

< REMOVAL AND INSTALLATION >

[VQ40DE]

After removing timing chain (primary), do not turn crankshaft and camshaft separately, or valves

will strike the piston heads.

8. Remove crankshaft sprocket, if necessary.
9. Remove timing chain (secondary) and camshaft sprockets as follows:
a. Attach stopper pin to the right and left timing chain tensioners

(secondary).

NOTE:

• Use stopper pin included with Tool J-50246.

b. Remove camshaft sprocket (INT and EXH) bolts.
c. Remove timing chain (secondary) together with camshaft sprockets.

• Turn camshaft slightly to secure slack of timing chain on timing chain tensioner (secondary) side.

• Insert 0.5 mm (0.020 in)-thick metal or resin plate between tim-

ing chain and timing chain tensioner plunger (guide). Remove

timing chain (secondary) together with camshaft sprockets

with timing chain loose from guide groove.

CAUTION:

Be careful of plunger coming off when removing timing

chain (secondary).

NOTE:

Camshaft sprocket (INT) is a one piece integrated design with

sprockets for timing chain (primary) and for timing chain (sec-

ondary).

• When handling camshaft sprocket (INT), be careful of the fol-

lowing:

CAUTION:

• Handle carefully to avoid any shock to camshaft

sprocket.

• Do not disassemble. (Do not loosen bolts (A) as shown).

NOTE:

For removal of timing chain tensioner (secondary), refer to

EM-

70, "Removal and Installation (Secondary Timing Chain Ten-

sioner)"

. [Removing camshaft bracket (No. 1) is required.]

INSPECTION AFTER REMOVAL

Check for cracks and any excessive wear at link plates. Replace

chain if necessary.

• Inspect all timing chains and associated parts for wear or damage,

replace as necessary.

INSTALLATION

PBIC2047E

PBIC1978E

PBIC2920E

PBIC0282E

2011 Pathfinder

EM-64

< REMOVAL AND INSTALLATION >

[VQ40DE]

TIMING CHAIN

NOTE:

The figure above shows the relationship between the mating mark on each timing chain and that on the corre-

sponding sprocket, with the components installed.
1. Make sure that dowel pin hole, dowel pin of camshaft and crank-

shaft key are located as shown. (No. 1 cylinder at compression

TDC)

•

NOTE:

Though camshaft does not stop at the position as shown, for

the placement of cam nose, it is generally accepted camshaft

is placed for the same direction of the figure.

2. Install timing chains (secondary) and camshaft sprockets as follows:

CAUTION:

Mating marks between timing chain and sprockets slip easily. Confirm all mating mark positions

repeatedly during the installation process.

Internal chain guide

Camshaft sprocket (intake)

Mating mark (blue link)

Mating mark (punched)

Secondary timing chain tensioner

Mating mark (copper link)

Secondary timing chain

Camshaft sprocket (exhaust)

Tensioner guide

10. Water pump

11. Crankshaft sprocket

12. Mating mark (notched)

13. Primary timing chain

14. Slack guide

15. Primary timing chain tensioner

16. Mating mark (back side)

17. Crankshaft key

Camshaft dowel pin hole (intake side)

: At cylinder head upper face side in each bank.

Camshaft dowel pin (exhaust side)

: At cylinder head upper face side in each bank.

Crankshaft key

: At cylinder head side of right bank.

AWBIA1011GB

KBIA1073E

2011 Pathfinder

TIMING CHAIN

EM-65

< REMOVAL AND INSTALLATION >

[VQ40DE]

a. Push plunger of timing chain tensioner (secondary) and keep it

pressed in with stopper pin.

• Use stopper pin included with Tool J-50246.

b. Before installing timing chains (secondary) and camshaft

sprockets, confirm mating marks are visible. If necessary, use

paint or equivalent to re-mark the camshaft sprockets at each

mating mark.

c. Install timing chains (secondary) (8) and camshaft sprockets

[INT (1) and EXH (9)].

• Left bank mating marks (6)

• Align the timing chain mating marks (secondary) (2) (blue

color link) with the ones on camshaft sprockets (INT and EXH)

(4), (5), (7) and (10) (punched), and install them.

NOTE:

• Mating marks for camshaft sprocket (INT) are on the back

side of camshaft sprocket (secondary).

• There are two types of mating marks, circle (7), (10) and

oval (4), (5) types. They should be used for the right and left

banks, respectively.

• Align dowel pin (3) and pin hole on camshafts with the groove

(11) and dowel pin on sprockets, and install them.

• On the intake side, align pin hole on the small diameter side of

the camshaft front end with dowel pin (3) on the back side of

camshaft sprocket, and install them.

• On the exhaust side, align dowel pin on camshaft front end

with pin groove (11) on camshaft sprocket, and install them.

• In case that positions of each mating mark and each dowel pin

do not fit on mating parts, make fine adjustment to the position by slightly turning camshaft(s).

• Bolts for camshaft sprockets must be tightened in the next step. Tightening them by hand is enough to

prevent the dislocation of dowel pins.

d. Confirm the mating marks are aligned, then finger tighten camshaft sprocket bolts. Final tightening will be

done with all timing chains installed.

SEM430G

SEM811G

Right bank

: Use circle type (7) and (10).

Left bank

: Use oval type (4) and (5).

WBIA0689E

2011 Pathfinder

EM-66

< REMOVAL AND INSTALLATION >

[VQ40DE]

TIMING CHAIN

e. Remove stopper pins out from timing chain tensioners (second-

ary).

3. Install timing chain (primary) as follows:
a. Install crankshaft sprocket.

• Make sure the mating marks on crankshaft sprocket face the

front of engine.

b. Install the primary timing chain.

• Water pump (G).

• Install primary timing chain so the mating mark punched (B) on

camshaft sprocket is aligned with the blue link (A) on the tim-

ing chain, while the mating mark notched (E) on the crankshaft

sprocket (D) is aligned with the copper link (F) on the timing

chain, as shown.

• When it is difficult to align mating marks (A) with (B) and (E)

with (F) of the primary timing chain with each sprocket, gradu-

ally turn the camshaft to align it with the mating marks.

• During alignment, be careful to prevent dislocation of mating

mark alignments of the secondary timing chains.

PBIC2110E

SEM929E

WBIA0721E

2011 Pathfinder

TIMING CHAIN

EM-67

< REMOVAL AND INSTALLATION >

[VQ40DE]

4. Install internal chain guide.

• If removed, reinstall slack guide.

CAUTION:

Do not overtighten slack guide bolts. It is normal for a gap

to exist under the bolt seats when bolts are tightened to

specification.

• Remove stopper pin from primary timing chain tensioner.

5. Make sure again that the mating marks on camshaft sprockets and timing chain have not slipped out of

alignment.

6. Tighten camshaft sprocket bolts to specification with all timing chains installed and Ring Gear Stopper

Tool holding the crankshaft.

7. Install front timing chain case. Refer to

EM-53, "Removal and Installation"

INSPECTION AFTER INSTALLATION

• 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-18, "FOR USA AND CANADA : Fluids and Lubricants"

(United

States and Canada) and

MA-20, "FOR MEXICO : Fluids and Lubricants"

(Mexico).

• 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 leak-

age 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 and 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.

PBIC2109E

PBIC2633E

Tool number

: — (J-48761)

2011 Pathfinder

EM-68

< REMOVAL AND INSTALLATION >

[VQ40DE]

TIMING CHAIN

• Warm up engine thoroughly to make sure there is no leakage of fuel, exhaust gas, or any oils/fluids including

engine oil and engine coolant.

• Bleed air from passages in lines and hoses, such as in cooling system.

• After cooling down engine, again check oil/fluid levels including engine oil and engine coolant. Refill to spec-

ified level, if necessary.

• Summary of the inspection items:

*Power steering fluid, brake fluid, etc.

Item

Before starting engine

Engine running

After engine stopped

Engine coolant

Level

Leakage

Level

Engine oil

Level

Leakage

Level

Transmission/
transaxle fluid

A/T and CVT Models

Leakage

Level/Leakage

Leakage

M/T Models

Level/Leakage

Leakage

Level/Leakage

Other oils and fluids*

Level

Leakage

Level

Fuel

Leakage

Exhaust gas

—

Leakage

—

2011 Pathfinder

TIMING CHAIN TENSIONER

EM-69

< REMOVAL AND INSTALLATION >

[VQ40DE]

TIMING CHAIN TENSIONER

Exploded View

INFOID:0000000006708627

Removal and Installation (Primary Timing Chain Tensioner)

INFOID:0000000006708628

REMOVAL

1. Remove engine room cover. Refer to

EM-25, "Removal and Installation"

2. Remove engine under cover. Refer to

EXT-15, "Removal and Installation"

3. Partially drain engine coolant. Refer to

CO-13, "Changing Engine Coolant"

4. Remove lower fan shroud. Refer to

CO-18, "Exploded View"

5. Disconnect crankcase ventilation hose and remove air duct and resonator assembly. Refer to

EM-26,

"Removal and Installation"

6. Disconnect MAF sensor and remove air cleaner case (upper). Refer to

EM-26, "Removal and Installation"

7. Remove coolant reservoir hose.
8. Disconnect upper radiator hose from radiator.
9. Disconnect and remove engine cooling fan (Motor driven type). Refer to

CO-22, "Removal and Installation

(Motor driven type)"

10. Remove upper fan shroud. Refer to

CO-18, "Exploded View"

11. Remove drive belt. Refer to

EM-14, "Removal and Installation"

12. Remove drive belt auto-tensioner. Refer to

EM-15, "Drive Belt Auto Tensioner and Idler Pulley"

13. Remove chain tensioner cover.
14. Remove timing chain tensioner (primary) as follows:

AWBIA0859GB

Internal chain guide

O-ring