Correct answer
Yes, and it should be between the maximum and minimum marks.
Yes, following the manufacturer’s checks and conditions. In the expansion tank, the level must be between the minimum and maximum marks; it must not overflow or be filled completely. Check it cold when specified and do not open a hot pressurised system because of burn risk. Do not wait for overheating to check the level. Oil and other fluid checks may have different conditions: not all are always checked cold.
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No, it's only necessary when you notice an abnormal rise in engine temperature.
Yes, and I must check that the reservoir is overflowing.
Yes, and it should be between the maximum and minimum marks.
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