Page 2057 of 2267

Changing Engine Coolant
WARNING:
To avoid being scalded, never change the coolant when the
engine is hot.
—DRAINING ENGINE COOLANT—
Heater
1. Set heater system as follows to prevent coolant from remain-
ing in the system.
Move temperature control dial all the way to“HOT”.
Semi-automatic air conditioning
1. Set air conditioning system as follows to prevent coolant from
remaining in the system.
a. Turn ignition switch“ON”and enter a temperature of 32°Con
the heater control.
b. Wait 30 seconds before turning ignition switch“OFF”.
2. Disconnect lower radiator hose and remove radiator cap.
3. Remove reservoir tank, drain coolant, then clean reservoir
tank.
Install it temporarily.
Be careful not to allow coolant to contact drive belts.
4. Remove cylinder block drain plug and air relief plug.
5. Check drained coolant for contaminants such as rust, corro-
sion or discoloration.
If contaminated, flush engine cooling system.
Refer to“FLUSHING COOLING SYSTEM”, MA-41.
—REFILLING ENGINE COOLANT—
6. Install lower radiator hose, reservoir tank and tighten cylinder
block drain plug securely.
Apply sealant to the thread of the cylinder block drain
plug.
:55-75N·m (5.7 - 7.6 kg-m, 41 - 55 ft-lb)
7. Fill up radiator with coolant at the speed of less than 3(2-5/8
Imp qt)/min.
If coolant spills from the air relief hole without bubbles, install
the plug and then pour coolant in again.
NMA104 Turn to HOT
Temperature control dial
NMA103 Temperature control
.NLC040
.Radiator
lower hose
NLC041 Drain plug
(cylinder block)
SMA353C Air
bleeder
ENGINE MAINTENANCECD20T
MA-40
Page 2058 of 2267

Air relief plug:
:8-9N·m (0.8 - 0.9 kg-m, 5.9 - 6.6 ft-lb)
Use genuine NISSAN Anti-Freeze Coolant or equivalent.
Refer to“RECOMMENDED FLUIDS AND LUBRICANTS”,
MA-16.
Coolant capacity (With reservoir tank):
Unit:(Imp qt)
CD20T6.1 (5-3/8)
8. Fill radiator and reservoir tank to specified level.
9. Start engine without installing radiator cap and warm it up at
2,000 rpm until radiator lower hose becomes hot.
If coolant level becomes low, refill coolant until coolant level
does not change.
If coolant overflows radiator filler hole, install filler cap.
10. Run engine at 2,500 prm for 10 seconds and return to idle
speed.
Repeat 2 or 3 times.
Watch coolant temperature gauge so as not to overheat the
engine.
11. Stop engine and wait until it cools down.
If necessary, refill radiator up to filler neck.
12. Refill reservoir tank to Max line with coolant.
13. Repeat steps 9 through 12 two or more times with radiator
cap installed until coolant level no longer drops.
14. Check cooling system for leaks with engine running.
15. Warm up engine, and check for sound of coolant flow while
running engine from idle up to 3,000 rpm with heater tem-
perature control lever set at several positions between COOL
and HOT.
Sound may be noticeable at heater water cock.
16. If the sound is heard, bleed air from cooling system by
repeating steps 9 through 12 until coolant level no longer
drops.
—FLUSHING COOLING SYSTEM—
1. Open air relief plug.
2. Fill radiator with water until water spills from the air relief
hole, then close air relief plug.
Air relief plug
:7-8N·m (0.7 - 0.8 kg-m, 5.1 - 5.8 ft-lb)
Fill radiator and reservoir tank with water and reinstall radia-
tor cap.
3. Run engine and warm it up sufficiently.
4. Rev engine 2 or 3 times under no-load.
Make sure that blower is“OFF”.
5. Stop engine and wait until it cools down.
6. Drain water.
7. Repeat steps 1 through 6 until clear water begins to drain
from radiator.
SMA182B Radiator
SMA412B MAX.
MIN.
ENGINE MAINTENANCECD20T
Changing Engine Coolant (Cont’d)
MA-41
Page 2059 of 2267

Checking Cooling System
CHECKING HOSES
Check hoses for proper attachment and for leaks, cracks,
damage, loose connections, chafing and deterioration.
CHECKING RADIATOR
Check radiator for mud or clogging. If necessary, clean radiator
as follows.
Be careful not to bend or damage the radiator fins.
When radiator is cleaned without removal, remove all sur-
rounding parts such as cooling fan, radiator shroud and
horns. Then tape the harness and connectors to prevent
water from entering.
1. Apply water by hose to the back side of the radiator core
vertically downward.
2. Apply water again to all radiator core surfaces once per
minute.
3. Stop washing if any stains no longer flow out from the radia-
tor.
4. Blow air into the back side of radiator core vertically down-
ward.
Use compressed air lower than 5 kg/cm2and keep distance
more than 30 cm (11.8 in).
5. Blow air again into all the radiator core surfaces once per
minute until no water sprays out.
CHECKING RADIATOR CAP
Apply pressure to radiator cap with cap tester to see if it is sat-
isfactory.
Radiator cap relief pressure:
Standard
98 - 118 kPa
(0.98 - 1.18 bar, 1.0 - 1.2 kg/cm
2, 14 - 17 psi)
Limit
59 - 118 kPa
(0.59 - 1.18 bar, 0.6 - 1.2 kg/cm
2,9-17psi)
When installing radiator cap to the tester, apply water or
coolant to the radiator cap seal.SLC613 EG17650301
ENGINE MAINTENANCECD20T
MA-42
Page 2060 of 2267
Pull the negative-pressure valve to open it. Check that it closes
completely when released.
CHECKING COOLING SYSTEM FOR LEAKS
Apply pressure to the cooling system with cap tester to check for
leakage.
Testing pressure:
157 kPa (1.57 bar, 1.6 kg/cm
2, 23 psi)
CAUTION:
Higher pressure than the specified value may cause damage
to radiator.
Checking Fuel Lines
Inspect fuel lines and tank for improper attachment and for leaks,
cracks, damage, loose connections, chafing and deterioration.
If necessary, repair or replace faulty parts.
Checking and Replacing Fuel Filter and
Draining Water
CHECKING FUEL FILTER
Check fuel filter for fuel leakage, damage and other abnormal
signs.
REPLACING FUEL FILTER
1. Disconnect fuel filter sensor connector and drain fuel.
SMA871B
SMA990A Hose adapter
EG17650301
SMA803A
Engine
Fuel line
Fuel tank
SMA794C Loosen
Drain valve
ENGINE MAINTENANCECD20T
Checking Cooling System (Cont’d)
MA-43
Page 2061 of 2267

2. Remove fuel filter, using a suitable tool.
3. Wipe clean fuel filter mounting surface on fuel filter bracket
and smear a little fuel on rubber seal of fuel filter.
4. Screw fuel filter on until O-ring touches mounting surface,
then tighten an additional 2/3 turn. Follow instructions on fuel
filter.
5. Install fuel filter sensor to new fuel filter.
6. Bleed air from fuel line.
7. Start engine and check for leaks.
DRAINING WATER
1. Set a container under fuel filter.
2. Loosen drain cock and drain water.
Loosening drain cock 4 to 5 turns causes water to start
draining. Do not remove drain cock by loosening it exces-
sively.
If water does not drain properly, move the priming pump up and
down.
3. Bleed air.
FUEL SYSTEM AIR BLEEDING
1. Move priming pump up and down until there is suddenly
more resistance in the movement. Then stop this action and
start the engine.
2. If engine does not operate smoothly after being started, rev
it two or three times.
When refilling empty fuel tank, bleed air out of fuel system.
Changing Air Cleaner Filter
Unfasten clamps to change air cleaner filter.
The viscous paper type filter does not need cleaning.
SMA896A
SMA010
MMA105A Loosen
Drain valveUp and
down
SMA795C Up and down
.SMA668B Air filter
ENGINE MAINTENANCECD20T
Checking and Replacing Fuel Filter and
Draining Water (Cont’d)
MA-44
Page 2062 of 2267

Changing Engine Oil
WARNING:
Be careful not to burn yourself, as the engine oil is hot.
Prolonged and repeated contact with used engine oil
may cause skin cancer; try to avoid direct skin contact
with used oil. If skin contact is made, wash thoroughly
with soap or hand cleaner as soon as possible.
1. Warm up engine, and check for oil leakage from engine com-
ponents.
2. Stop engine.
3. Remove drain plug and oil filler cap.
4. Drain oil and refill with new engine oil.
Oil specification and viscosity:
ACEA B2-96 (CCMC-PD2)
See“RECOMMENDED FLUIDS AND LUBRICANTS”,
MA-16.
Oil capacity (Approximately):
Unit:(Imp pts)
Drain and refill
With oil filter change5.0
Without oil filter change4.5
Dry engine (engine overhaul)5.1
CAUTION:
Be sure to clean drain plug and install with new washer.
Drain plug:
:29-39N·m (3.0 - 4.0 kg-m, 22 - 29 ft-lb)
The refill capacity depends on the oil temperature and
drain time. Use these specifications for reference only.
Always use the dipstick to determine when the proper
amount of oil is in the engine.
5. Warm up engine, and check area around drain plug and oil
filter for oil leakage.
6. Stop engine.
7. Check oil level.
Changing Engine Oil Filter
1. Remove oil filter with Tool.
WARNING:
Be careful not to burn yourself, as engine and engine oil are
hot.
SMA418C Engine oil drain plug
.SMA411C Oil filter cap
Engine oil
level gauge
SMA822C Refill oil to this“H”
level.
Do not overfill.
SMA412C Engine oil
filter
ENGINE MAINTENANCECD20T
MA-45
Page 2063 of 2267

2. Clean the oil filter mounting surface on cylinder block. Coat
the rubber seal of the new oil filter with engine oil.
3. Screw in the oil filter until a slight resistance is felt, then
tighten an additional 2/3 turn.
4. Add engine oil.
Refer to“Changing Engine Oil”, MA-45.
Clean excess oil from engine.
Checking Injection Nozzles
1. Remove injection delivery tubes and fuel spill tube.
2. Remove nozzle assembly with S.S.T. KV119E0030.
No. 1 cylinder nozzle assembly should not be disassembled
as it is provided with a needle lift sensor.
WARNING:
When using nozzle tester, be careful not to allow diesel fuel
sprayed from nozzle to come into contact with your hand or
body, and make sure that your eyes are properly protected.
3. Clean and check nozzles.
4. Install nozzle to injection nozzle tester and bleed air from
flare nut.
NMA037
.99545R2500
(KV101060S0)
SMA010
SMA229B 2/3 turn
SMA419C Injection nozzle assembly
EF791A
ENGINE MAINTENANCECD20T
Changing Engine Oil Filter (Cont’d)
MA-46
Page 2064 of 2267
5. Check initial injection pressure by pumping tester handle
slowly (one time per second).
Injection pressure:
12,749 kPa (127.5 bar, 130 kg/cm
2, 1,849 psi)
Always check initial injection pressure before installing
new nozzle.
6. Check fuel spray pattern by pumping tester handle quickly (4
or 6 times per second).
a. If main spray angle is within 30 degrees as shown, injec-
tion nozzle is good.
b. It is still normal even if a thin stream of spray deviates
from main spray (pattern B).
7. If spray is not correct, clean injection nozzle tip or replace it.
Refer to EC section for injection pressure adjustment, clean-
ing and replacement.
8. Install all injection nozzles with S.S.T. KV119E0030 and
securely connect fuel spill hoses and delivery tubes.
9. Bleed air from fuel system and check for fuel leakage with
engine running.
Replacing Timing Belt
Refer to“TIMING BELT”in EM section.
SEF672A
SEF079S
ENGINE MAINTENANCECD20T
Checking Injection Nozzles (Cont’d)
MA-47