Nissan Frontier D22. Manual - part 206

COOLING SYSTEM

CO-7

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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

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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

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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