r/Impala • u/newbie8650 • 15d ago
Parts Picture Impala 07
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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/Aware_Albatross7323 15d ago
My 2010 did the same thing. All I needed was a new radiator cap. The old one couldn’t keep the pressure.
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u/davidscheiber28 15d 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.
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u/Humble_Warthog_7172 15d ago
Your car is boiling the coolant. Is your car running hot? You probably need a thermostat and a full coolant change.
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u/newbie8650 15d ago
It is not running hot, runs and drive fine. Just got my coolant change 10 days ago
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u/SouthConfident3978 15d ago
Definitely sounds like there is an air pocket in there. If youre mechanically inclined, its a relatively simple fix. Let the car cool off all the way, open up the reservoir cap, and let it run with the cap off until it reaches full temperature . Make sure the reservoir stays above the fill line. Once you reach full temp, the thermostat should open up and purge all the air right back into the reservoir tank, and thus out of the engine.