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What does the coolant temperature gauge warn about, and what is an early sign of trouble?
- A.It warns of engine overheating; a steady climb above the normal range under a familiar load means the cooling system is falling behind and you should act before the red zone
- B.It only matters in winter
- C.A climb is normal on every grade with no limit
- D.The gauge can be ignored if steam is not visible
Correct answer
A. It warns of engine overheating; a steady climb above the normal range under a familiar load means the cooling system is falling behind and you should act before the red zone
Why
Waiting for steam means waiting until coolant is already boiling and damage has begun. Watching the trend, downshifting, reducing load, and stopping safely while the engine can still be shut down normally prevents a minor cooling problem from becoming an engine replacement.
Manual topic: Gauges - Temperature · From the General Knowledge practice bank (GK-365).