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Nissan Versa Sedan. Instruction - part 385

CYLINDER HEAD

EM-75

< REMOVAL AND INSTALLATION >

[HR16DE]

c. Turn all bolts 60 degrees clockwise (angle tightening) using Tool

(A) in the specified order.

CAUTION:

Check and confirm the tightening angle by using Tool (A) or

protractor. Avoid judgment by visual inspection without the

tool.

d. Completely loosen all bolts.

CAUTION:

In this step, loosen bolts in reverse order of that indicated as shown.

e. Tighten all bolts.

Turn all bolts 75 degrees clockwise (angle tightening).

g. Turn all bolts 75 degrees clockwise again (angle tightening).
3. Installation of the remaining components is in the reverse order of removal.

Disassembly and Assembly

INFOID:0000000009266667

DISASSEMBLY

1. Remove spark plug with a suitable tool.
2. Remove valve lifter.

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

3. Remove valve collet.

• Compress valve spring with Tool (A). Remove valve collet with

a magnet tool (B).

CAUTION:

Be careful not to damage valve lifter holes.

4. Remove valve spring retainer and valve spring.
5. Push valve stem to combustion chamber side, and remove valve.

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

6. Remove valve oil seal using Tool (A).

Tool number

: KV10112100 (BT-8653-A)

PBIC3733E

Cylinder head bolts

: 0 N·m (0 kg-m, 0 ft-lb)

Cylinder head bolts

: 40.0 N·m (4.1 kg-m, 30 ft-lb)

Tool number

: KV10116200 (J-26336-B)
: KV10115900 (J-26336-20)
: KV10109220 ( — )

PBIC3727E

Tool number

: KV10107902 (J-38959)

PBIC3728E

EM-76

< REMOVAL AND INSTALLATION >

[HR16DE]

CYLINDER HEAD

7. Remove valve spring seat.
8. When valve seat must be replaced, refer to

EM-76, "Inspection"

for removal.

9. When valve guide must be replaced, refer to

EM-76, "Inspection"

for removal.

ASSEMBLY

1. Install valve guide if removed. Refer to

EM-76, "Inspection"

2. Install valve seat if removed. Refer to

EM-76, "Inspection"

3. Install valve oil seal.

• Install with Tool (A) to match dimension as shown.

4. Install valve spring seat.
5. Install valve.

• Install larger diameter to intake side.

6. Install valve spring.

NOTE:

It can be installed in either direction.

7. Install valve spring retainer.
8. Install valve collet.

• Compress valve spring with Tool (A). Install valve collet with a

magnet hand (B).

CAUTION:

Be careful not to damage valve lifter holes.

• Tap valve stem edge lightly with a plastic hammer after instal-

lation to check its installed condition.

9. Install valve lifter.
10. Install spark plug with a suitable tool.

Inspection

INFOID:0000000009266668

INSPECTION AFTER REMOVAL

Cylinder Head Bolts Outer Diameter

• Cylinder head bolts are tightened by plastic zone tightening

method. Whenever the size difference between “d1” and “d2”

exceeds the limit, replace them with a new one.

• If reduction of outer diameter appears in a position other than “d2”,

use it as “d2” point.

Height “H”

: 13.2 - 13.8 mm (0.520 - 0.543 in)

Tool number

: KV10115600 (J-38958)

PBIC3211J

Tool number

: KV10116200 (J-26336-B)
: KV10115900 (J-26336-20)
: KV10109220 ( — )

PBIC3727E

Limit (“d1”–“d2”): 0.15 mm (0.0059 in)

PBIC3717E

CYLINDER HEAD

EM-77

< REMOVAL AND INSTALLATION >

[HR16DE]

Cylinder Head Distortion

NOTE:

When performing this inspection, cylinder block distortion should be also checking. Refer to

EM-103, "Inspec-

tion"

1. Wipe off engine oil and remove water scale (like deposit), gasket, sealant, carbon, etc. with a scraper.

CAUTION:

Use utmost care not to allow gasket debris to enter passages for engine oil or engine coolant.

2. At each of several locations on bottom surface of cylinder head,

measure the distortion in six directions.

• If it exceeds the limit, replace cylinder head.

INSPECTION AFTER DISASSEMBLY

VALVE DIMENSIONS

• Check the dimensions of each valve. For the dimensions, refer to

EM-120, "Cylinder head"

• If dimensions are out of the standard, replace valve and check valve seat contact. Refer to “VALVE SEAT

CONTACT”.

VALVE GUIDE CLEARANCE

Valve Stem Diameter

• Measure the diameter of valve stem with micrometer (A).

Valve Guide Inner Diameter

• Measure the inner diameter of valve guide with bore gauge.

Valve Guide Clearance

• (Valve guide clearance) = (Valve guide inner diameter) – (Valve

stem diameter)

• If the calculated value exceeds the limit, replace valve and/or valve guide. Refer to

EM-75, "Disassembly

and Assembly"

VALVE GUIDE REPLACEMENT

When valve guide is removed, replace with oversized [0.2 mm (0.008 in)] valve guide.
1. To remove valve guide, heat cylinder head to 110 to 130

°C (230

to 266

°F) by soaking in heated oil.

(A) : Straightedge
(B) : Feeler gauge

Limit

: Refer to

EM-120, "Cylinder head"

PBIC3207J

Standard

: Refer to

EM-120, "Cylinder head"

Standard

: Refer to

EM-120, "Cylinder head"

Standard and Limit

: Refer to

EM-120, "Cylinder head"

PBIC3213J

SEM008A

EM-78

< REMOVAL AND INSTALLATION >

[HR16DE]

CYLINDER HEAD

2. Drive out valve guide with a press [under a 20 kN (2 ton, 2.2 US

ton, 2.0 lmp ton) force] or suitable tool.

WARNING:

Cylinder head contains heat; when working, wear protective

equipment to avoid getting burned.

3. Ream cylinder head valve guide hole with a suitable tool.

4. Heat cylinder head to 110 to 130

°C (230 to 266°F) by soaking in

heated oil.

5. Using a suitable tool, press valve guide (1) from camshaft side

to dimensions as shown.

WARNING:

Cylinder head contains heat; when working, wear protective

equipment to avoid getting burned.

6. Apply reamer finish to valve guide with a suitable tool.

SEM931C

Valve guide hole diameter (for service parts):

Intake and exhaust

: 9.175 - 9.201 mm (0.3612 - 0.3622 in)

SEM932C

SEM008A

Projection “H”: : 11.4 - 11.8 mm (0.448 - 0.464 in)

PBIC3217J

Standard

5.000 - 5.018 mm (0.1968 - 0.1975 in)

SEM932C

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