Nissan Titan. Instruction — part 69
OVERHEATING CAUSE ANALYSIS
CO-9
< SYSTEM DESCRIPTION >
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Except cool-
ing system
parts mal-
function
—
Overload on engine
Abusive driving
High engine rpm under no
load
Driving in low gear for ex-
tended time
Driving at extremely high
speed
Powertrain system malfunc-
tion
—
Installed improper size
wheels and tires
Dragging brakes
Improper ignition timing
Blocked or restricted air
flow
Blocked radiator grille
Installed car brassiere
—
Mud contamination or paper
clogging
Blocked bumper
Blocked radiator
Blocked condenser
Blocked air flow
Installed large fog lamp
Symptom
Check items
CO-10
< PERIODIC MAINTENANCE >
ENGINE COOLANT
PERIODIC MAINTENANCE
ENGINE COOLANT
Inspection
INFOID:0000000009886472
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 radiator cap. Slowly turn it a
quarter of a turn to release built-up pressure. Carefully remove radiator cap by turning it all the way.
CHECKING COOLING SYSTEM HOSES
Check hoses for the following:
• Improper attachment
• Leaks
• Cracks
• Damage
• Loose connections
• Chafing
• Deterioration
LEVEL CHECK
• Check if the engine coolant reservoir tank level is within MIN to
MAX level when engine is cool.
• Adjust engine coolant level as necessary.
CHECKING COOLING SYSTEM FOR LEAKS
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 radiator cap. Slowly turn it a
quarter of a turn to release built-up pressure. Carefully remove radiator cap by turning it all the way.
• To check for leakage, apply pressure to the cooling system at the
reservoir filler neck using suitable tool (A) and Tool (B).
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
SMA412B
Tool number
: — (J-24460-92)
Test pressure
: 137 kPa (1.4 kg/cm, 20 psi)
AWBIA1467ZZ
ENGINE COOLANT
CO-11
< PERIODIC MAINTENANCE >
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• Check reservoir cap relief pressure using suitable tool and Tool.
NOTE:
Apply engine coolant to the cap seal.
• Replace the reservoir cap if there is any damage in the negative-
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.
Changing Engine Coolant
INFOID:0000000009886473
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 radiator cap. Slowly turn it a
quarter of a turn to release built-up pressure. Carefully remove radiator cap by turning it all the way.
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 undercover or skid plate. Refer to
EXT-15, "Removal and Installation"
3. Open the radiator drain plug at the bottom of the radiator, and
remove the radiator filler cap. This is the only step required
when partially draining the cooling system (radiator only).
CAUTION:
• Perform this step when the engine is cold.
• Do not to allow the coolant to contact the drive belts.
4. When draining all of the coolant in the system, it is necessary to
drain the cylinder block. Remove the RH cylinder block drain
plug to drain the right bank and the oil cooler hose to drain the
left bank as shown.
Tool number
: — (J-24460-92)
Standard
: 110 kPa (1.12 kg/cm
2
, 16 psi)
WBIA0611E
WBIA0391E
PBIC0146E
CO-12
< PERIODIC MAINTENANCE >
ENGINE COOLANT
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. Refer to
.
REFILLING ENGINE COOLANT
1. Close the radiator drain plug. Install the reservoir tank, cylinder block drain plug, and the oil cooler hose,
(if removed).
• The radiator must be completely empty of coolant and water.
• Apply sealant to the threads of the cylinder block drain plug. Use Genuine High Performance Thread
Sealant or equivalent. Refer to
GI-21, "Recommended Chemical Products and Sealants"
.
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.
• Use recommended coolant or equivalent. Refer to
"FOR NORTH AMERICA : Fluids and Lubricants"
States and Canada) or
MA-16, "FOR MEXICO : Fluids and
CAUTION:
Do not use any cooling additives such as radiator sealer. Addi-
tives may clog the cooling system and cause damage to the
engine, transmission and/or cooling system.
6. Install an air hose to the venturi assembly, the air pressure must
be within specification.
CAUTION:
WBIA0392E
Radiator drain plug
: Refer to
CO-15, "Removal and Installation"
.
RH cylinder block drain plug
: Refer to
.
Tool number
: KV991J0070 (J-45695)
Cooling system capacity
(with reservoir)
: Refer to
Compressed air
supply pressure
: 549 - 824 kPa (5.6 - 8.4 kg/cm
2
,
80 - 119 psi)
LLIA0058E
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