Nissan March K13. Manual - part 285

EM-74

< REMOVAL AND INSTALLATION >

[HR12DE]

CYLINDER HEAD

2.

Tighten cylinder head bolts in numerical order as shown in the
figure with the following procedure to install cylinder head.

CAUTION:

If cylinder head bolts are reused, check their outer diame-
ters before installation. Refer to “Cylinder Head Bolts Outer
Diameter”.

a.

Apply new engine oil to threads and seating surfaces of mount-
ing bolts.

b.

Tighten all bolts.

c.

Turn all bolts 60 degrees clockwise (angle tightening).

CAUTION:

Check and confirm the tightening angle by using the angle
wrench [SST: KV10112100] (A) or protractor. Avoid judg-
ment by visual inspection without the tool.

d.

Completely loosen.

CAUTION:

In this step, loosen bolts in reverse order of that indicated in the figure.

e.

Tighten all bolts.

f.

Turn all bolts 75 degrees clockwise (angle tightening).

g.

Turn all bolts 75 degrees clockwise again (angle tightening).

3.

Install in the reverse order of removal after this step. 

Disassembly and Assembly

INFOID:0000000005988203

DISASSEMBLY

1.

Remove spark plug with a spark plug wrench (commercial service tool).

2.

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

3.

Remove valve collet. 

A

:  EXH  side

B

:  INT  side

: Engine front

: 40.0 N·m (4.1 kg-m, 30 ft-lb)

JPBIA3428ZZ

JPBIA3401ZZ

: 0 N·m (0 kg-m, 0 ft-lb)

: 40.0 N·m (4.1 kg-m, 30 ft-lb)

CYLINDER HEAD

EM-75

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• Compress valve spring with the valve spring compressor, the

attachment and the adapter [SST: KV10116200] (A). Remove
valve collet with a magnet hand (B).

CAUTION:

When working, 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 them without mixing them up.

6.

Remove valve oil seal with the valve oil seal puller [SST:
KV10107902] (A).

7.

Remove valve spring seat.

8.

When valve seat must be replaced, refer to 

EM-76, "Inspection"

 to removal.

9.

When valve guide must be replaced, refer to 

EM-76, "Inspection"

 to 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 the valve oil seal drift [SST: KV10115600] (A) to

match dimension in the figure.

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.

JPBIA3402ZZ

JPBIA3403ZZ

Height “H”

: 13.2 - 13.8 mm (0.519 - 0.543 in)

JPBIA3404ZZ

EM-76

< REMOVAL AND INSTALLATION >

[HR12DE]

CYLINDER HEAD

• Compress valve spring with the valve spring compressor, the

attachment and the adapter [SST: KV10116200] (A). Install
valve collet with a magnet hand (B).

CAUTION:

When working, 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 spark plug wrench (commercial service tool).

Inspection

INFOID:0000000005988204

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.

Cylinder Head Distortion

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

EM-76, "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-95, "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

PBIC3727E

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

PBIC3717E

A

: Straightedge

B

: Feeler gauge

Limit

: Refer to 

EM-95, "Cylinder head"

.

PBIC3207J

CYLINDER HEAD

EM-77

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• 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. When valve guide must be

replaced. Refer to 

EM-74, "Disassembly and Assembly"

.

VALVE SEAT CONTACT

• After confirming that the dimensions of valve guides and valves are within the specifications, perform this

procedure.

• Apply prussian blue (or white lead) onto contacting surface of valve seat to check the condition of the valve

contact on the surface.

• Check if the contact area band is continuous all around the circum-

ference.

• If not, grind to adjust valve fitting and check again. If the contacting

surface still has “NG” conditions (B) even after the recheck,
replace valve seat. Refer to 

EM-74, "Disassembly and Assembly"

.

VALVE SPRING SQUARENESS

• Set a try square (A) along the side of valve spring and rotate

spring. Measure the maximum clearance between the top of spring
and try square.

• If it exceeds the limit, replace valve spring.

VALVE SPRING DIMENSIONS AND VALVE SPRING PRESSURE LOAD

• Check valve spring pressure with valve spring seat installed at the

specified spring height.

CAUTION:

Never remove valve spring seat from valve spring.

• If the installation load or load with valve open is out of the stan-

dard, replace valve spring (with valve spring seat).

INSPECTION AFTER INSTALLATION

Standard

: Refer to 

EM-95, "Cylinder head"

.

Standard

: Refer to 

EM-95, "Cylinder head"

.

Standard and Limit

: Refer to 

EM-95, "Cylinder head"

.

PBIC3213J

A

:  OK

JPBIA0187ZZ

B

: Contact

Limit

: Refer to 

EM-95, "Cylinder head"

.

PBIC3219J

Standard

: Refer to 

EM-95, "Cylinder head"

.

SEM113