Nissan Frontier. Instruction — part 224
ENGINE COOLANT
CO-43
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7. The vacuum gauge will begin to rise and there will be an audible hissing noise. During this process open
the ball valve on the refill hose slightly. Rising coolant will be visible in the refill hose. After the refill hose is
full of coolant, close the ball valve. This will purge air trapped in the refill hose.
8. Continue to draw the vacuum until the gauge reaches 28 inches
of vacuum. The gauge may not reach 28 inches in high altitude
locations. Refer to the following table for expected vacuum read-
ings.
9. When the vacuum gauge has reached the specified amount, disconnect the air hose and wait 20 seconds
to see if the system loses vacuum. If the vacuum level drops, perform necessary repairs to the system
and repeat steps 6 - 8 to bring the vacuum to the specified amount. Recheck for leaks.
10. Place the coolant container (with the refill hose inserted) at the same level as the top of the radiator. Then
open the ball valve on the refill hose so the coolant will be drawn up to fill the cooling system. The cooling
system is full when the vacuum gauge reads zero.
CAUTION:
Do not allow the coolant container to get too low when filling, to avoid air from being drawn into
the cooling system.
11. Remove the Tool from the radiator neck opening and install the radiator cap.
12. Remove the non-vented reservoir cap.
13. Fill the cooling system reservoir tank to the specified level. Run the engine to warm up the cooling system
and top up the system as necessary before installing the vented reservoir cap.
14. Install the engine under cover. Refer to
EXT-15, "Removal and Installation"
FLUSHING COOLING SYSTEM
1. Drain the water from the engine cooling system. Refer to
CO-40, "Changing Engine Coolant"
.
2. Fill the radiator and the reservoir tank (to the “MAX” line), with water. Reinstall the radiator cap and leave
the vented reservoir cap off.
3. Run the engine until it reaches normal operating temperature.
4. Press the engine accelerator two or three times under no-load.
5. Stop the engine and wait until it cools down.
6. Drain the water from the engine cooling system. Refer to
CO-40, "Changing Engine Coolant"
.
7. Repeat steps 2 through 6 until clear water begins to drain from the radiator.
Altitude above sea level
Vacuum gauge reading
0 - 100 m (328 ft)
: 28 inches of vacuum
300 m (984 ft)
: 27 inches of vacuum
500 m (1,641 ft)
: 26 inches of vacuum
1,000 m (3,281 ft)
: 24 - 25 inches of vacuum
LLIA0057E
CO-44
< REMOVAL AND INSTALLATION >
[VQ40DE]
RADIATOR
REMOVAL AND INSTALLATION
RADIATOR
Exploded View
INFOID:0000000009478186
Removal and Installation
INFOID:0000000009478187
WARNING:
Do not remove the radiator cap when the engine is hot. Serious burns could occur from high pressure
engine coolant escaping from the radiator. Wrap a thick cloth around the cap. Slowly turn it a quarter
of a turn to release built-up pressure. Carefully remove radiator cap by turning it all the way.
NOTE:
When removing components such as hoses, tubes/lines, etc., cap or plug openings to prevent fluid from spill-
ing.
REMOVAL
1. Drain engine coolant from radiator. Refer to
1.
Radiator bracket
2.
Mounting rubber (upper)
3.
Radiator cap
4.
Radiator
5.
Mounting rubber (lower)
6.
A/T fluid cooler hose
7.
A/T fluid cooler hose (if equipped)
8.
O-ring
9.
Drain plug
10. Cooling fan assembly (Motor driven
type)
11. Radiator shroud (upper)
12. Radiator hose (lower)
13. Radiator shroud (lower)
14. Reservoir tank hose
15. Reservoir tank cap
16. Reservoir tank
17. Water hose
18. Radiator hose (upper)
A.
To heater return tube
B.
To water pipe
C.
To A/T cooler tube
D.
To water inlet and thermostat assembly
Front
AWBIA1010GB
RADIATOR
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CAUTION:
• Perform this step when engine is cold.
• Do not spill engine coolant on drive belts.
2. Remove engine room cover. Refer to
EM-140, "Removal and Installation"
.
3. Remove air duct and resonator assembly and air cleaner case (upper). Refer to
.
4. Remove reservoir tank hose from radiator.
5. Remove PCV hose.
6. Remove radiator hoses (upper and lower).
CAUTION:
Be careful not to allow engine coolant to contact drive belts.
7. Disconnect A/T fluid cooler hoses, if equipped.
8. Remove engine cooling fan (Motor driven type). Refer to
CO-48, "Removal and Installation (Motor driven
.
9. Remove front grille. Refer to
EXT-23, "Removal and Installation"
10. Remove the upper radiator bracket bolts.
11. Remove the two A/C condenser bolts.
12. Remove radiator as follows:
CAUTION:
Do not damage or scratch A/C condenser and radiator core when removing.
a. Lift and pull radiator rearward to disengage mounting rubber
(lower) from radiator core support center.
CAUTION:
Because A/C condenser is attached to the front-lower por-
tion of radiator, moving it in the rear direction should be at a
minimum.
LBIA0419E
LBIA0421E
PBIC1936E
CO-46
< REMOVAL AND INSTALLATION >
[VQ40DE]
RADIATOR
b. Lift A/C condenser up and remove radiator after disengaging the
fitting at front-bottom surface.
CAUTION:
Lifting A/C condenser should be minimum to prevent a load
to A/C piping.
c.
After removing radiator, put A/C condenser on radiator core sup-
port center and temporarily fasten it with rope or wire to prevent
overloading the A/C piping.
INSTALLATION
Installation is in the reverse order of removal.
INSPECTION AFTER INSTALLATION
• Check for engine coolant leaks. Refer to
• Start and warm up engine. Visually check for engine coolant and A/T fluid leaks. Repair as necessary.
• Check and adjust engine coolant level and A/T fluid (if equipped). Refer to
(United States and Canada) or
MA-18, "FOR MEXICO : Fluids and Lubricants"
(Mexico).
PBIC1054E
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