Nissan Frontier D22. Manual — part 206
COOLING SYSTEM
CO-7
[KA24DE]
C
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COOLING SYSTEM
PFP:21020
Cooling Circuit
EBS00GV7
ALC117
CO-8
[KA24DE]
ENGINE COOLANT
ENGINE COOLANT
PFP:KQ100
System Check
EBS00GV8
WARNING:
●
Never remove the radiator cap when the engine is hot. Serious burns could occur from high pres-
sure coolant escaping from the radiator.
●
Wrap a thick cloth around the radiator cap. Slowly turn it a quarter turn to allow built-up pressure
to escape. Carefully remove the radiator cap by turning it all the way.
CHECKING COOLING SYSTEM HOSES
●
Check hoses for improper attachment, leaks, cracks, damage, chafing and deterioration.
CHECKING RADIATOR
Check radiator for mud or clogging. If necessary, clean radiator as follows:
CAUTION:
●
Be careful not to bend or damage the radiator fins.
●
When radiator is cleaned without removal, remove all surrounding parts such as cooling fan, radi-
ator shroud and horns.
●
Tape the harness 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 when water flows clear coming out of the radiator.
4.
Blow air into the back side of radiator core vertically downward.
●
Use compressed air lower than 490 kPa (5 kg/cm
2
, 71 psi) and keep the air hose end more than 30 cm
(11.8 in) away from the core.
5.
Blow air again into all the radiator core surfaces once per minute until no water blows out and the core is
dry.
CHECKING COOLING SYSTEM FOR LEAKS
●
To check for leakage, apply pressure to the cooling system with
a radiator cap tester.
CAUTION:
Higher pressure than specified may cause radiator damage.
CHECKING RADIATOR CAP
●
To check radiator cap, apply pressure to radiator cap with a radi-
ator cap tester.
Testing pressure
: 157 kPa (1.6 kg/cm
2
, 23 psi)
SLC756A
Radiator cap relief pressure
Standard
: 78 - 98 kPa (0.8 - 1.0 kg/cm
2
, 11 - 14 psi)
Limit
: 59 kPa (0.6 kg/cm
2
, 9 psi)
SLC755A
ENGINE COOLANT
CO-9
[KA24DE]
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●
Pull the negative pressure valve to open it.
Check that it closes completely when released.
Refilling Engine Coolant
EBS00GV9
For details on refilling the engine cooling system, refer to
MA-17, "REFILLING ENGINE COOLANT"
.
SMA967B
CO-10
[KA24DE]
WATER PUMP
WATER PUMP
PFP:21020
Removal
EBS00GVA
CAUTION:
●
When removing water pump assembly, be careful not to get coolant on drive belts.
●
Water pump cannot be disassembled and should be replaced as a unit.
●
After installing water pump, connect hose and clamp securely. Check for leaks using radiator cap
tester.
1.
Drain coolant from engine.
Refer to
MA-16, "DRAINING ENGINE COOLANT"
2.
Remove fan coupling with fan.
3.
Remove power steering pump drive belt, generator drive belt, and A/C compressor drive belt.
4.
Remove water pump pulley.
5.
Remove water pump.
1.
Water inlet
2.
Thermostat
3.
Water pump
4.
Water pump pulley
5.
Fan coupling
6.
Fan
LBIA0327E
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