Nissan Sentra manuals

Nissan Sentra Service Manual: Symptom diagnosis

OVERHEATING CAUSE ANALYSIS

Troubleshooting Chart

  Symptom

Check items

Cooling system parts malfunction Poor heat transfer Water pump malfunction Worn or loose drive belt —
Thermostat stuck closed Engine coolant circulation
Damaged fins Dust contamination or rock clogging
Mechanical damage
Clogged radiator cooling tube Excess foreign material (rust, dirt, sand, etc.)
Reduced air flow Cooling fan does not operate Fan shroud and motor as- High resistance to fan rota- sembly —
High resistance to fan rotation
Damaged fan blades
Damaged radiator shroud — Radiator shroud —
Improper engine coolant mixture ratio — Engine coolant viscosity —
Poor engine coolant quality — Periodic maintenance —
Insufficient engine coolant Engine coolant leaks Cooling hose Loose clamp
Cracked hose
Water pump Poor sealing
Radiator cap Loose
Poor sealing
Radiator O-ring for damage, deterioration or improper fitting
Cracked radiator tank
Cracked radiator core
Reservoir tank Cracked reservoir tank
Overflowing reservoir tank Exhaust gas leaks into cooling system Cylinder head deterioration
Cylinder head gasket deterioration
Except cooling system parts malfunction

—

Overload on engine Abusive driving High engine rpm under no load
Driving in low gear for extended time
Driving at extremely high speed
Powertrain system malfunction

—

Installed improper size wheels and tires
Dragging brakes
Improper ignition timing
Blocked or restricted air flow Blocked radiator grille Installed car brassiere —
Blocked bumper
Blocked radiator
Blocked condenser Mud contamination or paper clogging
Installed large fog lamp
System description
DESCRIPTION Engine Cooling System Schematic CVT Models Radiator Water inlet Reservoir tank Thermostat Engine oil cooler Thermostat housing Water pump Cylinder head Cylinder b ...

Periodic maintenance
ENGINE COOLANT System Inspection 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. Wr ...

Other materials:

Precaution for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT BELT PRE-TENSIONER"
The Supplemental Restraint System such as “AIR BAG” and “SEAT BELT PRE-TENSIONER”, used along with a front seat belt, helps to reduce the risk or severity of injury to the driver and front passenger for certain types of collision. Information necessary to service the system ...

Precaution for Work
When removing or disassembling each component, be careful not to damage or deform it. If a component may be subject to interference, be sure to protect it with a shop cloth. When removing (disengaging) components with a screwdriver or similar tool, be sure to wrap the component with a ...

Speedometer and odometer
Speedometer The speedometer indicates the vehicle speed. Odometer/Twin trip odometer The odometer 2 and the twin trip odometer 1 are displayed when the ignition switch is placed in the ON position. The odometer records the total distance the vehicle has been driven. The twin trip o ...

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