Nissan Pathfinder (2008 year). Manual — part 379

CAMSHAFT

EM-195

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[VK56DE]

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a.

Squeeze return-proof clip ends using suitable tool and push the
plunger into the tensioner body.

b.

Secure plunger using stopper pin.
• Stopper pin is made from hard wire approximately 1 mm (0.04

in) in diameter.

c.

Remove the bolts and the timing chain tensioner.

NOTE:
• Stop plunger in the fully extended position using return-proof clip

(1) if stopper pin is removed.

• Push the plunger (2) into the tensioner body while squeezing the

return-proof clip (1). Secure it using stopper pin (3).

6.

Remove the RH bank timing chain tensioner cover from the front
cover using Tool.

CAUTION:

Do not damage mating surfaces.

7.

Remove the RH bank timing chain tensioner using the following steps.

WARNING:

Plunger, spring, and spring seat pop out when squeezing return-proof clip without holding
plunger head. It may cause serious injuries. Always hold plunger head when removing.

a.

Squeeze return-proof clip ends using suitable tool and push the
plunger into the tensioner body.

b.

Secure plunger using stopper pin.
• Stopper pin is made from hard wire approximately 1 mm (0.04

in) in diameter.

KBIA2479E

KBIA2483E

Tool number

: KV10111100 (J-37228)

KBIA2521E

KBIA2479E

EM-196

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CAMSHAFT

c.

Remove the bolts and the RH bank timing chain tensioner (A).
NOTE:
If it is difficult to push plunger on RH bank timing chain tensioner
(A), remove the plunger under extended condition.

8.

Loosen camshaft sprocket bolts as shown and remove camshaft
sprockets.

CAUTION:

To avoid interference between valves and pistons, do not
turn crankshaft or camshaft with timing chain discon-
nected.

9.

Remove the RH (A) front cover bolts and LH (B) front cover
bolts.

10. Remove RH (A) camshaft bracket bolts and LH (C) camshaft

bracket bolts in the reverse of order shown to remove camshaft
brackets.
• Remove No. 1 camshaft bracket.

NOTE:
The bottom and front surface of bracket will be stuck because
of liquid gasket.

•

⇐

: Engine front

• B: Exhaust side
• D: Intake side

WBIA0705E

KBIA2485E

WBIA0706E

WBIA0707E

CAMSHAFT

EM-197

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11. Remove the camshaft.

12. Remove the valve lifters if necessary.

• Correctly identify location where each part is removed from. Keep parts organized to avoid mixing them

up.

INSPECTION AFTER REMOVAL

Camshaft Runout

1.

Put V block on precise flat work bench, and support No. 1 and
No. 5 journals of the camshaft.

2.

Set dial indicator vertically to No. 3 journal.

3.

Turn the camshaft to one direction, and measure the camshaft
runout on dial indicator (total indicator reading).

• If measurement exceeds specification, replace the camshaft.

Camshaft Cam Height

• Measure the camshaft cam height.

• If measurement is not within the specifications, replace the cam-

shaft.

Camshaft Journal Clearance

Camshaft Journal Diameter

• Measure the diameter of the camshaft journal.

Camshaft Bracket Inner Diameter

• Tighten the camshaft bracket bolt to the specified torque.
• Measure the inner diameter (A) of the camshaft bracket.

Calculation of Camshaft Journal Clearance
(Journal clearance) = (camshaft bracket inner diameter) – (camshaft
journal diameter)

• If measurement is not within specification, replace either or both

camshaft and cylinder head.

Camshaft runout

: Less than 0.02 mm (0.0008 in)

EMK0641D

Standard cam height
(intake)

: 44.865 - 45.055 mm
(1.7663 - 1.7738 in)

Standard cam height (ex-
haust)

: 45.075 - 45.265 mm
(1.7746 - 1.7821 in)

Cam wear limit
(intake & exhaust)

: 0.02 mm (0.0008 in)

PBIC0039E

Standard diameter

: 25.950 - 25.970 mm
(1.0217 - 1.0224 in)

PBIC0040E

Standard

: 26.000 - 26.021 mm (1.0236 - 1.0244 in)

Standard

: 0.030 - 0.071 mm (0.0012 - 0.0028 in)

PBIC1645E

EM-198

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CAMSHAFT

NOTE:
The inner diameter of the camshaft bracket is manufactured together with the cylinder head. Replace the
whole cylinder head as an assembly.

Camshaft End Play

• Install dial gauge in the thrust direction on the front end of the cam-

shaft. Measure the end play when the camshaft is moved forward/
backward (in direction to axis).

• If measurement is out of the specified range, replace the camshaft

and measure again.

• If measurement is still out of the specified range, replace the cylin-

der head.

• Measure the following parts if end play is outside the specified

value.

- Dimension

″

A

″

for camshaft No. 1 journal

- Dimension

″

B

″

for cylinder head No. 1 journal

• If measurements are not within specification, replace the camshaft

and/or cylinder head.

Camshaft Sprocket Runout

1.

Install the camshaft in the cylinder head.

2.

Install the camshaft sprocket to the camshaft.

3.

Measure the camshaft sprocket runout.

• If measurement exceeds the specification, replace the cam-

shaft sprocket.

Valve Lifter

Check if the surface of the valve lifter has any wear or cracks.
• If any damage is found, replace the valve lifter.
• Select the thickness of the head so that the valve clearance is

within the standard when replacing. Refer to

EM-202, "Inspection

after Installation"

.

Valve Lifter Clearance

Valve Lifter Diameter

Standard

: 0.115 - 0.188 mm (0.0045 - 0.0074 in)

PBIC0042E

Standard

: 30.500 - 30.548 mm (1.2008-1.2027 in)

Standard

: 30.360 - 30.385 mm (1.1953-1.1963 in)

KBIA2426J

Runout

: Less than 0.15 mm (0.0059 in)

KBIA0181J

KBIA0182E

CAMSHAFT

EM-199

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• Measure the diameter of the valve lifter.

Valve Lifter Hole Diameter

• Measure the diameter of the valve lifter hole of the cylinder head,

using suitable tool.

Calculation of Valve Lifter Clearance
(Valve lifter clearance) = (valve lifter hole diameter) – (valve lifter
diameter)

• If the measurement is not within specification, referring to each

specification of the valve lifter diameter and hole diameter, replace
either or both the valve lifter and cylinder head.

INSTALLATION

1.

Install the valve lifters if removed.
• Install removed parts in their original locations.

2.

Install the camshafts. Use the table below for identification of the
RH and LH, and intake and exhaust.

• Install so that the RH bank (B) dowel pins (A) and LH bank (C)

dowel pins (A) at the front of the camshaft face are in the
direction shown.

Standard

: 33.977 - 33.987 mm (1.3377 - 1.3381 in)

JEM798G

Standard

: 34.000 - 34.016 mm (1.3386 - 1.3392 in)

Standard

: 0.013 - 0.039 mm (0.0005 - 0.0015 in)

PBIC0043E

Bank

INT EXH

Identification

paint (front)

Identification

paint (rear)

Identification

rib

RH

INT

Pink

—

Yes

EXH

—

Orange

Yes

LH

INT

Pink

—

No

EXH

—

Orange

No

KBIA2523E

WBIA0708E

EM-200

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CAMSHAFT

3.

Install the RH bank (B) and LH bank (D) camshaft brackets (A).
• Install by referring to the installation location mark (E) on the

upper surface.

• Install so that the installation location mark (E) can be correctly

read when viewed from the intake manifold side (C).

• Install No. 1 camshaft bracket using the following procedure:
• C:11 mm (0.43 in)
• D: 2.0 - 3.0 mm (0.079 - 0.118 in) dia.
- Apply liquid gasket to No. 1 camshaft bracket (A) and (B) as

shown.
Use Genuine RTV Silicone Sealant or equivalent. Refer to

GI-26, "Recommended Chemical Products and Sealants"

.

CAUTION:

• After installation, be sure to wipe off any excessive liq-

uid gasket outside of application (C) and (D) both on RH
and LH sides.

• Remove completely any excess of liquid gasket inside

bracket.

- Apply liquid gasket (C) to the back side of the LH (A) bank

front cover and RH (B) bank front cover as shown.
Use Genuine RTV Silicone Sealant or equivalent. Refer to

GI-26, "Recommended Chemical Products and Sealants"

.

- C: 2.6 - 3.6 mm (0.102 - 0.142 in) dia.

⇐

: Front

AWBIA0164ZZ

WBIA0710E

WBIA0711E

CAMSHAFT

EM-201

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- Position No. 1 camshaft bracket close to the mounting posi-

tion, and then install it to prevent from touching liquid gasket
applied to each surface.

- Temporarily tighten the RH (A) and LH (B) front cover bolts (4

for each bank) as shown.

4.

Tighten the camshaft bracket bolts as follows:

CAUTION:

After tightening the camshaft bracket bolts, be sure to wipe
off excessive liquid gasket from the parts listed below.
• Mating surface of rocker cover
• Mating surface of front cover
• A: RH bank
• B: Exhaust side
• C: LH bank
• D: Intake side
•

⇐

: Front

a.

Tighten the RH (A) and LH (B) front cover bolts (4 for each bank)
as shown to the specified torque.

SBIA0259E

WBIA0706E

Camshaft bracket bolts

Step 1 (bolts 9 - 12)

: 2.0 N·m (0.2 kg-m, 17 in-lb)

Step 2 (bolts 1 - 8)

: 2.0 N·m (0.2 kg-m, 17 in-lb)

Step 3 (all bolts)

: 5.9 N·m (0.6 kg-m, 52 in-lb)

Step 4 (all bolts)

: 10.4 N·m (1.1 kg-m, 92 in-lb)

WBIA0707E

Front cover bolts

: 11.0 N·m (1.1 kg-m, 8 ft-lb)

WBIA0706E

EM-202

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[VK56DE]

CAMSHAFT

5.

Install the camshaft sprockets using the following procedure:
• A: LH bank shown

a.

Install the camshaft sprockets aligning them with the matching
marks painted on the timing chain (B) and the camshaft sprock-
ets (C) before removal. Align the camshaft sprocket key groove
with the dowel pin on the camshaft front edge at the same time.
Then temporarily tighten camshaft sprocket bolts.

• Install the intake VTC (A) and exhaust (B) side camshaft

sprockets by selectively using the groove of the dowel pin
according to the bank for the exhaust (B) side camshaft
sprockets. (Common part used for both exhaust banks.)

• A: Intake (VTC)
• B: Exhaust
• R: for RH bank
• L: for LH bank

b.

Lock the hexagonal part of the camshaft in the same way as for
removal, and tighten the camshaft sprocket bolts.

c.

Check again that the timing alignment mark on the timing chain
and on each sprocket are aligned.

6.

Install the chain tensioner using the following procedure:
NOTE:
LH is shown.

a.

Install the chain tensioner.
• Compress the plunger and hold it using a stopper pin when

installing.

• Loosen the slack guide side timing chain by rotating the cam-

shaft hexagonal part if mounting space is small.

b.

Remove the stopper pin and release the plunger to apply ten-
sion to the timing chain.

c.

Install the RH bank timing chain tensioner cover onto the front
cover.
• Apply liquid gasket as shown.

Use Genuine RTV Silicone Sealant or equivalent. Refer to

GI-26, "Recommended Chemical Products and Sealants"

.

7.

Check and adjust valve clearances. Refer to

EM-202, "Inspec-

tion after Installation"

.

8.

Installation of the remaining components is in the reverse order
of removal.

Inspection after Installation

INFOID:0000000001683807

INSPECTION OF CAMSHAFT SPROCKET (INT) OIL GROOVE

CAUTION:

• Perform this inspection only when DTC P0011 is detected in self-diagnostic results of CONSULT III

and it is directed according to inspection procedure of EC section. Refer to

EC-573, "Component

Inspection"

.

• Check when engine is cold so as to prevent burns from any splashing engine oil.

AWBIA0152ZZ

AWBIA0151ZZ

Chain tensioner bolts

: 6.9 N·m (0.70 kg-m, 61 in-lb)

Tensioner cover bolts

: 9.0 N·m (0.92 kg-m, 80 in-lb)

KBIA2479E

KBIA2547E