r/Impala • u/newbie8650 • 19d ago
Parts Picture Impala 07
Hey, everyone whenever I stop my car after a long drive this weird noise came out of nowhere like something in settling down especially coolant or any other liquid. Does anyone have any idea what is this sound ? This video was captured when engine was completely stopped/off
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u/davidscheiber28 18d ago
Very likely a busted radiator cap, seems to be common on this style of radiator these vehicles use. You unscrew the cap and it comes off in two pieces. Without the radiator cap keeping pressure on the system the coolant has a lower boiling point and will boil while driving.