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Vauxhall Chevette
Cooling trouble shooter
Cooling

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FAULT CAUSE CURE
Loss of coolant 1. Leaks. 1. Locate and repair.
2. Damaged radiator or heater matrix. 2. Repair or replace radiator or matrix.
3. Damaged cylinder head gasket. 3. Replace gasket. Check engine oil and refill as necessary.
4. Cracked cylinder block. 4. Replace cylinder block. Check engine oil in crank-case for mixing with water.
5. Cracked cylinder head. 5. Replace cylinder head.
6. Loose cylinder head nuts. 6. Tighten cylinder head nuts.
Poor circulation 1. Restriction in system 1. Check hoses for kinking. Clear the system of rust and sludge.
2. Insufficient coolant. 2. Replenish.
3. Inoperative water pump. 3. Replace water pump.
4. Loose fan belt. 4. Adjust/replace belt.
5. Thermostat not opening. 5. Replace thermostat.
Corrosion 1. Insufficient anti-freeze. 1. Add anti-freeze.
2. Infrequent flushing and changing of coolant. 2. Flush thoroughly at least every two years.
Overheating 1. Inoperative thermostat. 1. Replace thermostat.
2. Radiator fins obstructed. 2. Clean fins.
3. Incorrect engine tune. 3. Tune engine.
4. Inoperative water pump. 4. Replace.
5. Loose fan belt. 5. Adjust tension.
6. Restricted radiator. 6. Flush radiator.
7. Inaccurate temperature gauge. 7. Replace temperature gauge.
8. Faulty sender unit. 8. Replace sender unit.
Overcooling 1. Inoperative thermostat. 1. Replace thermostat.
2. Faulty temperature gauge. 2. Check gauge.
3. Faulty sender unit. 3. Check sender unit.


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