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Conditions of engine overheating are coolant and engine temp warning lights come on a and stay on or coolant overflows from reservoir onto ground while engine is running.
Causes are
1. loss of coolant
2. loss of system pressure
3. low coolant protection ( should be -40 f)
4. belt tension too low
5. spark timing incorrect
6. timing retarded by poor function of distributor vacuum advance unit or thermal vacuum switch
7. water pump inoperative
8. radiator fins obstructed
9. cooling system passages blocked by rust or scale
10. reservoir hose pinched or kinked ( especially at radiator filler neck)
11. lower radiator hose collapses
12. defective engine metal temp switch
13. exhaust system restriction
14. thermostat stuck in closed position.
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∙ 14y ago
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