Nissan Frontier. Instruction — part 223
ENGINE COOLANT
CO-39
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PERIODIC MAINTENANCE
ENGINE COOLANT
System Inspection
INFOID:0000000009478184
WARNING:
• Do not remove the radiator/reservoir cap when the engine is hot. Serious burns could occur from
high pressure fluid escaping from the radiator or reservoir.
• Wrap a thick cloth around the cap. Slowly push down and turn it a quarter turn to allow built-up pres-
sure to escape. Carefully remove the cap by pushing down and turning it all the way.
CHECKING COOLING SYSTEM HOSES
Check hoses for the following:
• Improper attachment
• Leaks
• Cracks
• Damage
• Loose connections
• Chafing
• Deterioration
CHECKING RESERVOIR LEVEL
• Check if the engine coolant reservoir tank level is within MIN to
MAX when the engine is cool.
• Adjust engine coolant level as necessary.
CHECKING COOLING SYSTEM FOR LEAKS
WARNING:
Do not remove the radiator/reservoir cap when the engine is hot. Serious burns could occur from high
pressure coolant escaping from the radiator or reservoir.
• To check for leakage, apply pressure to the cooling system at the
reservoir filler neck using suitable tool and Tool.
CAUTION:
Higher pressure than specified may cause radiator damage.
NOTE:
In case that engine coolant decreases, replenish cooling system
with engine coolant.
• If any concerns are found, repair or replace damaged parts.
CHECKING RESERVOIR CAP
1. Inspect the reservoir cap.
• Replace the cap if the metal plunger cannot be seen around the edge of the black rubber gasket.
• Replace the cap if deposits of waxy residue or other foreign material are on the black rubber gasket or
the metal retainer.
NOTE:
Thoroughly wipe out the reservoir filler neck to remove any waxy residue or foreign material.
SMA412B
Tool number
: EG17650301 (J-33984-A)
Testing pressure : Refer to
WBIA0568E
CO-40
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ENGINE COOLANT
2. Pull the negative-pressure valve to open it and check that it
closes completely when released.
• Check that there is no dirt or damage on the valve seat of the
reservoir cap negative-pressure valve.
• Check that there are no abnormalities in the opening and clos-
ing conditions of the negative-pressure valve.
3. Check reservoir cap relief pressure using suitable tool and Tool.
NOTE:
• Apply engine coolant to the cap seal surface.
• Replace the reservoir cap if there is any damage in the nega-
tive-pressure valve, or if the open-valve pressure is outside of
the limit.
CHECKING RADIATOR CAP
Inspect the radiator cap.
NOTE:
Thoroughly wipe out the radiator filler neck to remove any waxy residue or foreign material.
• Replace the cap if deposits of waxy residue or other foreign material are on the black rubber gasket or the
metal retainer.
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 shroud
and horns. Then tape the harness and electrical connectors to prevent water from entering.
1. Spray water to the back side of the radiator core using a side to side motion from the top down.
2. Stop spraying when debris no longer flows from radiator core.
3. Blow air into the back side of radiator core using a side to side motion from the top down.
• Use compressed air lower than 490 kPa (5 kg/cm
2
, 71 psi) and keep distance more than 30 cm (11.8 in).
4. Continue to blow air until no water sprays out.
5. Check for coolant leaks. Repair as necessary.
Changing Engine Coolant
INFOID:0000000009478185
WARNING:
• To avoid being scalded, do not change the coolant when the engine is hot.
• Wrap a thick cloth around the cap to carefully remove the cap. First, turn the cap a quarter of a turn
to release any built-up pressure, then push down and turn the cap all the way to remove it.
• Avoid direct skin contact with used coolant. If skin contact is made, wash thoroughly with soap or
hand cleaner as soon as possible.
• Keep coolant out of the reach of children and pets.
DRAINING ENGINE COOLANT
1. Turn ignition switch ON and set temperature control lever all the way to HOT position or the highest tem-
perature position. Wait 10 seconds and turn ignition switch OFF.
2. Remove the engine under cover. Refer to
EXT-15, "Removal and Installation"
.
SMA967B
Tool number
: EG17650301 (J-33984-A)
Standard
: Refer to
WBIA0570E
ENGINE COOLANT
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3. Open the radiator drain plug at the bottom of the radiator, and
remove the reservoir cap. This is the only step required when
partially draining the cooling system (radiator only).
CAUTION:
• Do not allow the coolant to contact the drive belts.
• Perform this step when engine is cold.
4. When draining all of the coolant in the system for engine
removal or repair, it is necessary to drain the cylinder block.
Remove the cylinder block drain plugs (A), (B), (C), (D) and
block heater (if equipped), to drain the cylinder block as shown.
CAUTION:
Do not reuse copper sealing washers.
NOTE:
For Canada, the (D) cylinder block drain plug as shown, is not a
cylinder block drain plug but a block heater.
5. Remove the reservoir tank to drain the engine coolant, then clean the reservoir tank before installing it.
6. Check the drained coolant for contaminants such as rust, corrosion or discoloration.
If the coolant is contaminated, flush the engine cooling system. Follow the “Flushing Cooling System" pro-
cedure.
REFILLING ENGINE COOLANT
LLIA0070E
WLIA0020E
CO-42
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ENGINE COOLANT
1. Close the radiator drain plug. Install the reservoir tank, cylinder
block drain plugs (A), (B), (C), (D) and block heater (if
equipped).
CAUTION:
Do not reuse copper sealing washers.
• The radiator must be completely empty of coolant and water.
• Apply sealant to the threads of the cylinder block drain plugs
(A), (B), (C), (D).
• Use Genuine High Performance Thread Sealant or equiva-
GI-21, "Recommended Chemical Products
• Tighten each plug to the specified torque. Refer to
2. Set the vehicle heater controls to the full HOT and heater ON position. Turn the vehicle ignition ON with
the engine OFF as necessary to activate the heater mode.
3. Remove the vented reservoir cap and replace it with a non-vented reservoir cap before filling the cooling
system.
4. Install the Tool by installing the radiator cap adapter onto the
radiator neck opening. Then attach the gauge body assembly
with the refill tube and the venturi assembly to the radiator cap
adapter.
5. Insert the refill hose into the coolant mixture container that is
placed at floor level. Make sure the ball valve is in the closed
position.
CAUTION:
Do not use any cooling system additives such as radiator
sealer. Additives may clog the cooling system and cause
damage to the engine, transmission and/or cooling system.
NOTE:
Use recommended coolant or equivalent. Refer to
USA AND CANADA : Fluids and Lubricants"
(United States and
MA-18, "FOR MEXICO : Fluids and Lubricants"
(Mexico).
6. Install an air hose to the venturi assembly, the air pressure must
be within specification.
CAUTION:
The compressed air supply must be equipped with an air dryer.
Radiator drain plug
: Refer to
WLIA0020E
Tool number
: KV991J0070 (J-45695)
Cooling system capacity
(with reservoir)
:
Compressed air
supply pressure
: 549 - 824 kPa (5.6 - 8.4 kg/cm
2
,
80 - 119 psi)
LLIA0058E
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