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The coolant temperature keeps climbing toward the red zone while you climb a grade on a hot day. Which action comes first?
- A.Turn the heater off so the cab stays cool
- B.Pour cold water into a hot radiator immediately
- C.Ignore it until steam appears, since gauges often read high
- D.Ease off the load on the engine, watch the gauge, and stop safely to find the cause if it keeps rising
Correct answer
D. Ease off the load on the engine, watch the gauge, and stop safely to find the cause if it keeps rising
Why
A rising temperature gauge is an early warning of overheating, low coolant, a slipping belt, or a blocked radiator. Reducing engine load and stopping before a boil-over prevents warped parts and a much more expensive failure.
Manual topic: Vehicle Systems - Cooling · From the General Knowledge practice bank (GK-116).