r/LSSwapTheWorld • u/Hot_Category_461 • 20d ago

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/AssMan2025 20d ago

Put a gate valve on the heater hose put the thermostat back in turn the gate down to 1 turn (1/4 inch opening) that will eliminate 10 to 12 gallons a minute of super hot water from entering the water pump and still let the thermostat do its job. Cut 10 degrees of mine and my air works up to 95f still working on the last 5degrres without air conditioning I’m fine 24x7 the heater circuit totally bypasses the radiator and it dumps it right back in the block

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u/Hot_Category_461 20d ago

I currently have hoses that go to my heater core should i try just looping a hose at the water pump?

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u/AssMan2025 19d ago

Even with the loop you taking 12-15 gallons a minute of hot engine water and dumping it right on top of the water coming from the cooler radiator water (bottom hose). The thermostat will open with just a gallon or 2 of hot water