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Anonymous
Anonymous asked in Cars & TransportationMaintenance & Repairs · 1 month ago

I just had the expansion tank for my car replaced . after the mechanic added the coolant. he revved the engine very hard, .?

is this normal, I thought he was going to blow the head gasket?

7 Answers

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  • 1 month ago
    Favorite Answer

    It's done to spin the water pump quickly and boost the circulation of coolant.  That helps get air bubbles out and also helps show up any leaks. It's not dangerous unless prolonged unnecessarily.

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  • 1 month ago

    No harm if done very quickly.

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  • Dan
    Lv 5
    1 month ago

    No load on the engine, the head gasket couldn't care less.

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  • 1 month ago

    He was trying to purge the air from the cooling system and was making sure the coolant was circulating.

    Source(s): Mitsubishi Master Tech
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  • 1 month ago

    So long as he'd given time for the oil to circulate no harm should result from this.

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  • 1 month ago

    This is generally not good practice these days.

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  • Anonymous
    1 month ago

    Old school mechanics do that.   No harm if done very quickly.

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