Nissan Pathfinder (2006 year). Manual — part 241

CAMSHAFT

EM-75

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2006 Pathfinder

CAMSHAFT

PFP:13001

Removal and Installation

EBS00QC0

1.

Intake valve timing control solenoid
valve (right bank)

2.

Gasket

3.

Camshaft bracket (No. 2 to 4)

4.

Camshaft (EXH)

5.

Camshaft (INT)

6.

Camshaft bracket (No. 1)

7.

Dowel pin

8.

Valve lifter

9.

O-ring

10.

Timing chain tensioner (secondary)
(right bank)

11.

Spring

12. Plunger

13.

Timing chain tensioner (secondary)
(left bank)

14.

Cylinder head (right bank)

15. Cylinder head (left bank)

16. O-ring

17.

Camshaft position sensor (PHASE)
(right bank)

18.

Camshaft position sensor (PHASE)
(left bank)

19. Intake valve timing control solenoid

valve (left bank)

PBIC2930E

EM-76

CAMSHAFT

2006 Pathfinder

REMOVAL

1.

Remove front timing chain case, camshaft sprocket, timing chain and rear timing chain case. Refer to

EM-

56, "REMOVAL"

.

2.

Remove camshaft position sensor (PHASE) (right and left
banks) from cylinder head back side.

CAUTION:

●

Handle carefully to avoid dropping and shocks.

●

Do not disassemble.

●

Do not allow metal powder to adhere to magnetic part at
sensor tip.

●

Do not place sensors in a location where they are
exposed to magnetism.

3.

Remove intake valve timing control solenoid valves.

●

Discard intake valve timing control solenoid valve gaskets and
use new gaskets for installation.

4.

Remove 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.

5.

Remove camshafts.

6.

Remove valve lifters.

●

Identify installation positions, and store them without mixing them up.

KBIA1046E

SEM443GA

PBIC2050E

CAMSHAFT

EM-77

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2006 Pathfinder

7.

Remove timing chain tensioner (secondary) from cylinder head.

●

Remove timing chain tensioner (secondary) with its stopper
pin attached.

NOTE:
Stopper pin was attached when timing chain (secondary) was
removed.

INSPECTION AFTER REMOVAL
Camshaft 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.

Set dial indicator vertically to No. 3 journal.

3.

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

4.

If it exceeds the limit, replace camshaft.

Camshaft Cam Height

1.

Measure the camshaft cam height with micrometer.

2.

If wear exceeds the limit, replace camshaft.

Camshaft Journal Oil Clearance

CAMSHAFT JOURNAL DIAMETER

●

Measure the outer diameter of camshaft journal with microme-
ter.

CAMSHAFT BRACKET INNER DIAMETER

●

Tighten camshaft bracket bolt with the specified torque. Refer to

EM-80, "INSTALLATION"

for the tighten-

ing procedure.

PBIC2111E

Standard

: Less than 0.02 mm (0.0008 in)

Limit

: 0.05 mm (0.0020 in)

PBIC0929E

Standard:

Intake

: 45.465 - 45.655 mm (1.7900 - 1.7974 in)

Exhaust

: 45.075 - 45.265 mm (1.7746 - 1.7821 in)

Limit:

Intake

: 45.265 mm (1.7821 in)

Exhaust

: 44.875 mm (1.7667 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

EM-78

CAMSHAFT

2006 Pathfinder

●

Measure the inner diameter “A” of camshaft bracket with bore
gauge.

CAMSHAFT JOURNAL OIL CLEARANCE

●

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

●

If the calculated value exceeds the limit, replace either or both camshaft and cylinder head.

NOTE:
Camshaft bracket cannot be replaced as a single part, because it is machined together with cylinder head.
Replace whole cylinder head assembly.

Camshaft End Play

●

Install dial indicator in thrust direction on front end of camshaft.
Measure the end play of 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.

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

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

CAMSHAFT

EM-79

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2006 Pathfinder

2.

Measure the camshaft sprocket runout with dial indicator. (Total
indicator reading)

●

If it exceeds the limit, replace camshaft sprocket.

Valve Lifter

Check if surface of valve lifter has any wear or cracks.

●

If anything above is found, replace valve lifter. Refer to

EM-136,

"Available Valve Lifter"

.

Valve Lifter Clearance

VALVE LIFTER OUTER DIAMETER

●

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

VALVE LIFTER HOLE DIAMETER

●

Measure the inner diameter of valve lifter hole of cylinder head
with inside micrometer.

VALVE LIFTER CLEARANCE

●

(Valve lifter clearance) = (Valve lifter hole diameter) – (Valve lifter outer diameter), Refer to

EM-84, "Valve

Clearance"

.

Limit

: 0.15 mm (0.0059 in)

PBIC0930E

KBIA0182E

Standard (Intake and exhaust)

: 33.977 - 33.987 mm (1.3377 - 1.3381 in)

JEM798G

Standard (Intake and exhaust)

: 34.000 - 34.016 mm (1.3386 - 1.3392 in)

SEM867E

Standard (Intake and exhaust)

: 0.013 - 0.039 mm (0.0005 - 0.0015 in)

EM-80

CAMSHAFT

2006 Pathfinder

●

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.

INSTALLATION

1.

Install timing chain tensioners (secondary) on both sides of cyl-
inder head.

●

Install timing chain tensioner with its stopper pin 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.

●

Install new O-rings as shown.

2.

Install valve lifters.

●

Install it in the original position.

3.

Install camshafts.

●

Install camshaft with dowel pin attached to its front end face
on the exhaust side.

●

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 dowel pin hole and dowel pin on front
end face are positioned as shown. (No. 1 cylinder TDC on its
compression stroke)
NOTE:

●

Large and small pin holes are located on front end face of
camshaft (INT), at intervals of 180

°

. Face small dia. side

pin hole upward (in cylinder head upper face direction).

●

Though camshaft does not stop at the portion as shown, for
the placement of cam nose, it is generally accepted cam-
shaft is placed for the same direction as shown.

PBIC2111E

KBIA1071E

Bank

INT/EXH

Dowel pin

Paint marks

Identification

mark

M1

M2

RH

INT

No

Green

No

RE

EXH

Yes

No

White

RE

LH

INT

No

Green

No

LH

EXH

Yes

No

White

LH

KBIA1009E

PBIC2478E

CAMSHAFT

EM-81

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2006 Pathfinder

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.

●

Install camshaft brackets (No. 2 to 4) aligning the stamp
marks as shown.
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-47, "Recommended Chemical Products and Sealants"

.

PBIC2051E

PBIC2052E

PBIC2660E

EM-82

CAMSHAFT

2006 Pathfinder

5.

Tighten camshaft bracket bolts in the following steps, in numeri-
cal order as shown.

6.

Measure the difference in levels between front end faces of
camshaft bracket (No. 1) and cylinder head.

●

Measure two positions (both intake and exhaust side) for a
single bank.

●

If the measured value is out of the standard, re-install cam-
shaft bracket (No. 1).

7.

Check and adjust the valve clearance. Refer to

EM-84, "Valve Clearance"

.

8.

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

Camshaft bracket bolts

Step 1 (bolts 7 - 10)

: 1.96 N·m (0.2 kg-m, 17 in-lb)

Step 2 (bolts 1 - 6)

: 1.96 N·m (0.2 kg-m, 17 in-lb)

Step 3

: 5.88 N·m (0.6 kg-m, 52 in-lb)

Step 4

: 10.4 N·m (1.1 kg-m, 92 in-lb)

PBIC2050E

Standard

: –0.14 to 0.14 mm (–0.0055 to 0.0055 in)

EMQ0044D