Ch. 4 · Pre-Drive Conduct

When the amount of coolant has decreased significantly, there is a risk of water leakage from the radiator, radiator hoses, or similar parts.

[True / False · Hard]

Answer: ✓ True

Explanation

The radiator and cooling system inspection method in the Rules of the Road states: "When the amount of coolant has decreased significantly, there is a risk of water leakage from the radiator, radiator hoses, or similar parts."

Driving school curriculumStage 2 – Topic 9: Vehicle maintenance

Hikari
Hikari
If coolant drops a little, I can just top it off later, right?
Misaki
Misaki
That's incorrect. A big drop means the radiator or hoses are probably leaking — topping off won't fix the leak, and your engine can overheat.
Hikari
Hikari
So I need to find the leak first?
Misaki
Misaki
Yes. Inspect the radiator and hoses right away, or you'll be stranded with a fried engine.

Source: Ch. 4 Pre-Drive Conduct · Section (第３節 自動車の点検) · 冷却水の量が著しく減少しているときは、ラジエータ、ラジエータホースなどからの水漏れのおそれがあります。

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Source content excerpted from the NPA “Rules of the Road” instructional manual, in the public domain under Japanese Copyright Act Article 13(2). Explanations are AI-assisted and copyrighted by the MenkyoQuest editorial team.