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Nissan Pathfinder. Manual - part 560

CAMSHAFT

EM-79

< REMOVAL AND INSTALLATION >

7. Before installing camshaft brackets, apply liquid gasket to mat-

ing surface of No. 1 camshaft bracket.

• Use Genuine Silicone RTV Sealant or equivalent. Refer to

CAUTION:

• Installation should be done within 5 minutes after apply-

ing liquid gasket.

• Do not fill the engine with engine oil for at least 30 min-

utes after the components are installed to allow the liq-

uid gasket to cure.

• Before installation, wipe off any protruding liquid gasket.

• Refer to

EM-4, "Precaution for Liquid Gasket"

• Install camshaft brackets in their original positions and direc-

tion. Align the stamp marks as shown.

• If checking and adjusting any part of valve assembly or

camshaft, check valve clearance according to the refer-

ence data. Refer to

EM-18, "Valve Clearance"

SEM446G

PBIC0915E

Valve clearance (cold) Intake

: 0.26 - 0.34 mm
(0.010 - 0.013 in)

Valve clearance (cold) Exhaust

: 0.29 - 0.37 mm
(0.011 - 0.015 in)

SEM564G

EM-80

< REMOVAL AND INSTALLATION >

CAMSHAFT

• Tighten the camshaft brackets in three steps, in numerical

order shown.

8. Measure difference in levels between front end faces of No. 1

camshaft bracket and cylinder head.

• If measurement is outside the specified range, re-install cam-

shaft and camshaft bracket.

9. Install camshaft position sensors (PHASE) (RH and LH bank.)
10. Install the timing chains. Refer to

EM-62, "Removal and Installation"

Inspection After Removal

INFOID:0000000009177930

INSPECTION

Camshaft Visual Check

Check camshaft for scratches and wear. Replace if necessary.

Camshaft Runout

(1) 1.96 N·m (0.2 kg-m, 17 in-lb)

Tighten No. 7 - 10, then
tighten No. 1 - 6 in the nu-
merical order shown.

(2) 5.88 N·m (0.6 kg-m, 52 in-lb)

Tighten No. 1 - 10 in the nu-
merical order shown.

(3) 10.41 N·m (1.10 kg-m, 8 ft-lb)

Tighten No. 1 - 10 in the nu-
merical order shown.

SEM885EA

SEM886EA

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

EMQ0044D

CAMSHAFT

EM-81

< REMOVAL AND INSTALLATION >

1. Put V-block on precise flat bed and support No. 2 and No. 4 jour-

nal of camshaft as shown.

2. Set dial gauges vertically to No. 3 journal as shown.
3. Turn camshaft in one direction slowly by hand measure the cam-

shaft runout on the dial gauges.

• Runout is the largest indicator reading after one full revolution.

4. If actual runout exceeds the limit, replace the camshaft.

Camshaft Lobe Height

1. Measure camshaft lobe height as shown. Refer to

EM-134,

"Camshaft"

2. If wear has reduced the camshaft lobe height below specifica-

tions, replace the camshaft.

Camshaft Journal Clearance

Outer Diameter of Camshaft Journal

• Measure outer diameter of camshaft journal as shown.

Inner Diameter of Camshaft Bracket
1. Tighten camshaft bracket bolt with specified torque.
2. Using inside micrometer, measure inner diameter (A) of cam-

shaft bracket.

Calculation of Camshaft Journal Clearance

(Journal clearance) = (inner diameter of camshaft bracket) – (outer diameter of camshaft journal)

Camshaft Runout
Standard

: Less than 0.02 mm (0.0008 in)

Limit

: 0.05 mm (0.0020 in)

PBIC0929E

SEM549A

Standard outer diameter
No.1

: 25.935 - 25.955 mm
(1.0211 - 1.0218 in)

Standard outer diameter
No.2, 3, 4

: 23.445 - 23.465 mm
(0.9230 - 0.9238 in)

SEM012A

Standard inner diameter
No.1

: 26.000 - 26.021 mm
(1.0236 - 1.0244 in)

Standard inner diameter
No.2, 3, 4

: 23.500 - 23.521 mm
(0.9252 - 0.9260 in)

SEM862E

EM-82

< REMOVAL AND INSTALLATION >

CAMSHAFT

• When out of the specified range, replace either or both camshaft and cylinder head.

NOTICE:

Inner diameter of camshaft bracket is manufactured together with cylinder head. Replace the whole cylinder

head assembly.

Camshaft End Play

1. Install the camshaft in the cylinder head.
2. Install dial gauge in thrust direction on front end of camshaft.

Measure end play when camshaft is moved forward/backward

(in direction to axis) as shown.

• If out of the specified range, replace with new camshaft and mea-

sure again.

• If out of the specified range again, replace with new cylinder head.

Camshaft Sprocket Runout

1. Put V-block on precise flat bed and support No. 2 and No. 4 jour-

nal of camshaft as shown.

2. Install camshaft sprocket on camshaft.
3. Measure camshaft sprocket runout.

4. If sprocket runout exceeds the limit, replace camshaft sprocket.

Valve Lifter

• Check if the surface of the valve lifter has any excessive wear or

cracks replace as necessary.

Valve Lifter Clearance

Outer Diameter of Valve Lifter

Standard
No.1

: 0.045 - 0.086 mm (0.0018 - 0.0034 in)

Standard
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

Runout

: Less than 0.15 mm (0.0059 in)

PBIC0930E

KBIA0182E

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