Hey Scotty;I have a 2013 Chevy Sonic.My question is after sitting first thing in the morning of about ten-minutes..Should the lower radiator hose and the alltwo hoses going to the overflow and the upper hose from the thermostat all be hot at one time or does it just take longer for the thermostat to open ?

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ScottyKilmer
ScottyKilmer

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it just takes longer for thermo to fully open if cold outsid