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Nissan Titan. Manual - part 69

OVERHEATING CAUSE ANALYSIS

CO-9

< SYSTEM DESCRIPTION >

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 >

• 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

, 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

CO-11, "Changing Engine Cool-

ant"

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

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

MA-15,

"FOR NORTH AMERICA : Fluids and Lubricants"

(United

States and Canada) or

MA-16, "FOR MEXICO : Fluids and

Lubricants"

(Mexico).

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

EM-92, "Exploded View"

Tool number

: KV991J0070 (J-45695)

Cooling system capacity
(with reservoir)

: Refer to

CO-24, "Stan-

dard and Limit"

Compressed air
supply pressure

: 549 - 824 kPa (5.6 - 8.4 kg/cm

80 - 119 psi)

LLIA0058E

Content .. 67 68 69 70 ..