Contents: Overheat ↡ Hypothermia ↡ External coolant leak ↡ Internal coolant leak ↡ Corrosion ↡ Fuel and exhaust systems ↡
Overheat
- Insufficient amount of coolant in the system (Weekly check).
- Thermostat is faulty (Chapter 3).
- The radiator or radiator grille is clogged (Chapter 3).
- The electric radiator cooling fan or coolant temperature sensor is faulty (Chapter 3).
- Temperature gauge malfunction (Chapter 3).
- Air lock in the cooling system (Chapter 1).
- The radiator cap is faulty (Chapter 3).
Hypothermia
- Thermostat is faulty (Chapter 3).
- The coolant temperature gauge sensor is faulty (Chapter 3).
- Viscous coupling failure (Chapter 3)
External coolant leak
- The hoses or clamps are damaged (Chapter 1).
- Leak through the radiator or heater heat exchanger (Chapter 3).
- The radiator cap is faulty (Chapter 3).
- Leak through the seal of the cooling system pump (Chapter 3).
- Internal water pump leak (Chapter 3).
- Liquid boiling due to overheating (Chapter 3).
- Leaking rod plugs (Chapter 2).
Internal coolant leak
- Cylinder head gasket leak (Chapter 2).
- Crack in the cylinder head or in the cylinder block (Chapter 2).
Corrosion
- Rare replacement of fluid and flushing of the cooling system (Chapter 1).
- Incorrect coolant composition or wrong type of antifreeze ("Weekly checks").
Fuel and exhaust systems
Increased fuel consumption
- Clogged air cleaner filter element (Chapter 1).
- Incorrect choke adjustment or choke sticking - carburetor models (Chapter 4A).
- Fuel injection system malfunction (Chapter 4B).
- Fuel Injector Failure - Diesel Models (Chapter 4B).
- Incorrect ignition timing or ignition system malfunction (Chapters 1 and 5).
- Insufficient tire pressure ("Weekly check").
Fuel leak and/or fuel smell
- Damage or corrosion of the fuel tank, lines or connections (Chapter 4).
Excessive noise or soot from the exhaust system
- Leak in the exhaust system or manifold connections (Chapters 1 and 4).
- Leaking through a rusty or damaged muffler or pipes (Chapters 1 and 4).
- Contact of the exhaust pipe with the underbody or suspension due to damage to the exhaust line mount (Chapter 1).
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