Nissan Teana J32. Manual - part 474

EM-20

< ON-VEHICLE MAINTENANCE >

CAMSHAFT VALVE CLEARANCE

• By referring to the figure, measure the valve clearances at

locations marked “

×

” as shown in the table below (locations

indicated in the figure).

• No. 5 cylinder at compression TDC

3.

Perform adjustment if the measured value is out of the standard. Refer to “ADJUSTMENT”.

ADJUSTMENT

• Perform adjustment depending on selected head thickness of valve lifter.
1.

Measure the valve clearance. Refer to “INSPECTION”.

2.

Remove camshaft. Refer to 

EM-84, "Exploded View"

.

3.

Remove valve lifters at the locations that are out of the standard.

4.

Measure the center thickness of the removed valve lifters with a
micrometer (A).

5.

Use the equation below to calculate valve lifter thickness for replacement.

• VQ25DE

: Engine front

Measuring position [bank 1 (A)]

No. 1 CYL.

No. 3 CYL.

No. 5 CYL.

No. 5 cylinder at 

compression TDC

EXH (C)

×

 (B)

INT (D)

×

 (E)

Measuring position [bank 2 (H)]

No. 2 CYL.

No. 4 CYL.

No. 6 CYL.

No. 5 cylinder at 

compression TDC

INT (D)

×

 (F)

EXH (C)

×

 (G)

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Valve lifter thickness calculation:

t = t

1

+ (C

1 

– C

2

)

t

= Valve lifter thickness to be replaced

t

1

= Removed valve lifter thickness

C

1

= Measured valve clearance

C

2

= Standard valve clearance:

Intake

: 0.30 mm (0.012 in) 

Exhaust

: 0.33 mm (0.013 in) 

CAMSHAFT VALVE CLEARANCE

EM-21

< ON-VEHICLE MAINTENANCE >

C

D

E

F

G

H

I

J

K

L

M

A

EM

N

P

O

- Thickness of new valve lifter can be identified by stamp marks

on the reverse side (inside the cylinder).

Stamped mark 788P indicates 7.88 mm (0.3102 in) in thick-
ness. (intake side)
Stamped mark 666U indicates 6.66 mm (0.2622 in) in thick-
ness. (exhaust side)
Available thickness of valve lifter: 27 size with range 7.88 to
8.40 mm (0.3102 to 0.3307 in) (intake side) and 6.66 to 7.18
mm (0.2622 to 0.2827 in) (exhaust side) in steps of 0.02
(0.0008 in) (when manufactured at factory). Refer to 

EM-136, "Camshaft"

.

CAUTION:

Install identification letter at the end, “P”and “U”, at each of proper positions. (Be careful of mis-
installation between intake and exhaust)

• VQ35DE
- Thickness of new valve lifter can be identified by stamp marks

on the reverse side (inside the cylinder).

Stamp mark 788P indicates 7.88 mm (0.3102 in) in thickness.

Available thickness of valve lifter: 27 sizes with range 7.88 to 8.40 mm (0.3102 to 0.3307 in) in steps of
0.02 mm (0.0008 in) (when manufactured at factory). Refer to 

EM-136, "Camshaft"

.

6.

Install selected valve lifter.

7.

Install camshaft. Refer to 

EM-84, "Exploded View"

.

8.

Manually turn crankshaft pulley a few turns. 

9.

Check that the valve clearances for cold engine are within the specifications by referring to the specified
values. Refer to 

EM-17, "Inspection and Adjustment"

.

10. Install all removal parts in the reverse order of removal. 
11. Warm up the engine, and check for unusual noise and vibration.

A

:  Stamp

B

: Thickness of valve lifter

A

:  Stamp

B

: Thickness of valve lifter

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EM-22

< ON-VEHICLE MAINTENANCE >

COMPRESSION PRESSURE

COMPRESSION PRESSURE

Inspection

INFOID:0000000003802245

1.

Warm up engine thoroughly. Then, stop it.

2.

Release fuel pressure. Refer to 

EC-411, "Inspection"

.

3.

Disconnect fuel pump fuse to avoid fuel injection during measurement. Refer to 

EC-20,

"Component Parts Location"

.

4.

Remove engine cover. Refer to 

EM-24, "Exploded View"

.

5.

Remove ignition coil and spark plug from each cylinder. Refer to 

EM-49, "Exploded View"

.

6.

Connect engine tachometer (not required in use of CONSULT-III).

7.

Install compression gauge with an adapter (commercial service
tool) onto spark plug hole.

• Use the adapter whose picking up end inserted to spark plug

hole is smaller than 20 mm (0.79 in) in diameter. Otherwise, it
may be caught by cylinder head during removal.

8.

With accelerator pedal fully depressed, turn ignition switch to “START” for cranking. When the gauge
pointer stabilizes, read the compression pressure and the engine rpm. Perform these steps to check each
cylinder.

CAUTION:

Always use a fully charged battery to obtain the specified engine speed.
• If the engine speed is out of the specified range, check battery liquid for proper gravity. Check the

engine speed again with normal battery gravity. 

• If compression pressure is below minimum value, check valve clearances and parts associated with

combustion chamber (valve, valve seat, piston, piston ring, cylinder bore, cylinder head, cylinder head
gasket). After the checking, measure compression pressure again.

• If some cylinder has low compression pressure, pour small amount of engine oil into the spark plug hole

of the cylinder to recheck it for compression.

- If the added engine oil improves the compression, piston rings may be worn out or damaged. Check pis-

ton rings and replace if necessary.

- If the compression pressure remains at low level despite the addition of engine oil, valves may be mal-

functioning. Check valves for damage. Replace valve or valve seat accordingly.

• If two adjacent cylinders have respectively low compression pressure and their compression remains

low even after the addition of engine oil, cylinder head gaskets are leaking. In such a case, replace cyl-
inder head gaskets.

9.

After inspection is completed, install removed parts.

PBIC0900E

a

: 

φ

20 mm (0.79 in)

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Compression pressure

: Refer to 

EM-135, "General Specification"

.

COMPRESSION PRESSURE

EM-23

< ON-VEHICLE MAINTENANCE >

C

D

E

F

G

H

I

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K

L

M

A

EM

N

P

O

10. Start the engine, and check that the engine runs smoothly.

11. Perform trouble diagnosis. If DTC appears, erase it. Refer to 

EC-124, "Description"

.