Nissan Terrano r20e. Instruction — part 279

Tool name

Description

Deep socket (12 mm)

NT821

Removing and installing glow plugs

PREPARATION

ZD

Commercial Service Tools (Cont’d)

EM-7

SEM290G

NOISE, VIBRATION AND HARSHNESS (NVH) TROUBLESHOOTING

ZD

EM-8

NVH Troubleshooting Chart — Engine Noise

Use the chart below to help you find the cause of the symptom.
1. Locate the area where noise occurs.
2. Confirm the type of noise.
3. Specify the operating condition of engine.
4. Check specified noise source.
If necessary, repair or replace these parts.

Location of

noise

Type of

noise

Operating condition of engine

Source of

noise

Check item

Reference

page

Before

warm-up

After

warm-up

When

starting

When

idling

When

racing

While

driving

Top of
engine
Rocker
cover
Cylinder
head

Ticking or
clicking

C

A

—

A

B

—

Tappet
noise

Valve clearance

MA section
(“Adjusting
Intake &
Exhaust
Valve
Clearance”,
“ENGINE
MAINTE-
NANCE”)

Rattle

C

A

—

A

B

C

Camshaft
bearing
noise

Camshaft bushing clearance
Camshaft runout

EM-31, 31

Crankshaft
pulley
Cylinder
block (Side
of engine)
Oil pan

Slap or
knock

—

A

—

B

B

—

Piston pin
noise

Piston and piston pin clear-
ance
Connecting rod bushing
clearance

EM-71, 73

Slap or rap

A

—

—

B

B

A

Piston slap
noise

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

EM-75, 72,
72, 73

Knock

A

B

C

B

B

B

Connecting
rod bearing
noise

Connecting rod bushing
clearance (Small end)
Connecting rod bearing
clearance (Big end)

EM-73, 77

Knock

A

B

—

A

B

C

Main bear-
ing noise

Main bearing oil clearance
Crankshaft runout

EM-78, 76

Front of
engine
Timing gear
cover

Tapping or
ticking

A

A

—

B

B

B

Timing gear
noise

Timing gear backlash

EM-41

Front of
engine

Squeaking
or fizzing

A

B

—

B

—

C

Other drive
belts (Stick-
ing or slip-
ping)

Drive belts deflection

MA section
(“Checking
Drive Belts”,
“ENGINE
MAINTE-
NANCE”)

Creaking

A

B

A

B

A

B

Other drive
belts (Slip-
ping)

Idler pulley bearing operation

Squall
Creak

A

B

—

B

A

B

Water pump
bearing
noise

Water pump bearing opera-
tion

LC section
(“Water
Pump
Inspection”,
“ENGINE
COOLING
SYSTEM”)

A: Closely related

B: Related

C: Sometimes related

—: Not related

NOISE, VIBRATION AND HARSHNESS (NVH) TROUBLESHOOTING

ZD

EM-9

1. Warm up engine.
2. Turn ignition switch OFF.
3. Using CONSULT-II, make sure no error codes are indicated for

self-diagnosis items. Refer to EC section, “Fuel Pressure
Release”.

I

Do not disconnect CONSULT-II until the end of this operation;
it will be used to check engine rpm and for error detection at
the end of this operation.

4. Disconnect the negative battery terminal.
5. Remove the following parts.

I

Intercooler

I

Throttle body

I

Rocker cover

6. To prevent fuel from being injected during inspection, remove

fuel injection pump fuse [ENG CONT A/T (15A)] from fuse box
on the right side of engine compartment.

7. Remove glow plugs from all the cylinders.

I

Before removal, clean the surrounding area to prevent
entry of any foreign materials into the engine.

I

Carefully remove glow plugs to prevent any damage or
breakage.

I

Handle with care to avoid applying any shock to glow
plugs.

8. Install adapter (SST) to installation holes of glow plugs and

connect compression gauge for diesel engine.

: 15 - 19 N

⋅

m (1.5 - 2.0 kg-m, 11 - 14 ft-lb)

9. Connect battery negative terminal.
10. Set the ignition switch to “START” and crank. When gauge

pointer stabilizes, read compression pressure and engine rpm.
Repeat the above steps for each cylinder.

I

Always use a fully-charged battery to obtain specified
engine speed.

Unit: kPa (bar, kg/cm

2

, psi)/rpm

Standard

Minimum

Difference limit between

cylinders

2,942 (29.42, 30.0, 427)/

200

2,452 (24.52, 25.0, 356)/

200

294 (2.94, 3.0, 43)/200

I

When engine rpm is out of the specified range, check the spe-
cific gravity of battery liquid. Measure again under corrected
conditions.

I

If engine rpm exceeds the limit, check valve clearance and
combustion chamber components (valves, valve seats, cylinder
head gaskets, piston rings, pistons, cylinder bores, cylinder
block upper and lower surfaces) and measure again.

11. Complete this operation as follows:
a. Turn the ignition switch to “OFF”.
b. Disconnect battery negative terminal.
c. Replace glow plug oil seals and install glow plugs.
d. Install fuel injection pump fuse [ENG CONT A/T (15A)].
e. Connect battery negative terminal.
f.

Using CONSULT-II make sure no error code is indicated for
items of self-diagnosis. Refer to EC section, “Trouble Diagno-
sis — Index”.

YEM039

SEM334G

MEASUREMENT OF COMPRESSION PRESSURE

ZD

EM-10