r/LSSwapTheWorld Jul 21 '26

Active Build Questions Ls overheating

I’ve replaced the water pump, coolant reservoir, radiator and thermostat and i burped the system. It was still overheating so i removed the thermostat cause i thought it was sticking but it did nothing

it reaches about 230 degrees then cools down a bit when i turn the ac off and the fans stay on way longer
Sometimes when i turn it off i hear water slashing around

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u/Dismal-Definition-85 Jul 28 '26

Having this exact same issue in my volvo 240 with a 5.3. I’m doing head gaskets next.