Nissan March K13. Manual — part 270

EM-14

< BASIC INSPECTION >

[HR12DE]

COMPRESSION PRESSURE

COMPRESSION PRESSURE

Inspection

INFOID:0000000005988166

1.

Warm up engine thoroughly. Then, stop it.

2.

Release fuel pressure. Refer to following.
• HR12DE (TYPE 1):

EC-113, "Work Procedure"

• HR12DE (TYPE 2):

EC-386, "Work Procedure"

3.

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

EM-41, "Removal and Installation"

.

4.

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

5.

Install compression gauge (B) with an adapter (A) (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.

6.

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. Refer to

PG-130, "How to Handle Battery"

.

• 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, and 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.

7.

After inspection is completed, install removed parts.

8.

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

JPBIA3440ZZ

a

: 20 mm (0.79 in)

JPBIA0171ZZ

Compression pressure

: Refer to

EM-92, "General Specification"

.

COMPRESSION PRESSURE

EM-15

< BASIC INSPECTION >

[HR12DE]

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9.

Perform trouble diagnosis. If DTC appears, erase it. Refer to following.
• HR12DE (TYPE 1):

EC-45, "Diagnosis Description"

• HR12DE (TYPE 2):

EC-346, "Diagnosis Description"

EM-16

< SYMPTOM DIAGNOSIS >

[HR12DE]

NOISE, VIBRATION AND HARSHNESS (NVH) TROUBLESHOOTING

SYMPTOM DIAGNOSIS

NOISE, VIBRATION AND HARSHNESS (NVH) TROUBLESHOOTING

NVH troubleshooting Chart

INFOID:0000000005988167

1.

Locate the area where noise occurs.

2.

Confirm the type of noise.

3.

Specify the operating condition of engine.

JPBIA3381ZZ

NOISE, VIBRATION AND HARSHNESS (NVH) TROUBLESHOOTING

EM-17

< SYMPTOM DIAGNOSIS >

[HR12DE]

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4.

Check specified noise source.

If necessary, repair or replace these parts.

A: Closely related

B: Related

C: Sometimes related

—: Not related

Location

of noise

Type of

noise

Operating condition of engine

Source of

noise

Check item

Refer-

ence page

Before

warm-

up

After

warm-

up

When

start-

ing

When

idling

When

racing

While

driving

Top of en-
gine
Rocker
cover
Cylinder
head

Ticking or
clicking

C

A

—

A

B

—

Tappet
noise

Valve clearance

EM-11

Rattle

C

A

—

A

B

C

Camshaft
bearing
noise

Camshaft journal oil
clearance
Camshaft runout

EM-93

Crank-
shaft pul-
ley
Cylinder
block
(Side of
engine)
Oil pan

Slap or
knock

—

A

—

B

B

—

Piston pin
noise

Piston to piston pin oil
clearance
Connecting rod bushing
oil clearance

EM-97

Slap or
rap

A

—

—

B

B

A

Piston
slap noise

Piston to cylinder bore
clearance
Piston ring side clear-
ance
Piston ring end gap
Connecting rod bend
and torsion

EM-97

Knock

A

B

C

B

B

B

Connect-
ing rod
bearing
noise

Connecting rod bushing
oil clearance
Connecting rod bearing
oil clearance

EM-97

EM-100

Knock

A

B

—

A

B

C

Main bear-
ing noise

Main bearing oil clear-
ance
Crankshaft runout

EM-99
EM-97

Front of
engine
Front cov-
er

Tapping or
ticking

A

A

—

B

B

B

Timing
chain and
chain ten-
sioner
noise

Timing chain cracks
and wear
Timing chain tensioner
operation

EM-51
EM-43

Front of
engine

Squeak-
ing or fizz-
ing

A

B

—

B

—

C

Drive belt
(Sticking
or slip-
ping)

Drive belt deflection

EM-92

Creaking

A

B

A

B

A

B

Drive belt
(Slipping)

Idler pulley bearing op-
eration

Squall
Creak

A

B

—

B

A

B

Water
pump
noise

Water pump operation

CO-19