Your LS Swap Overheats Because of THIS! #lsswap #automotive #engineswap

Is your LS swap overheating even after adding electric fans, an aluminum radiator, and a good thermostat? The problem may not be the radiator — it may be trapped air in the cooling system. In this video, I explain why LS swaps can overheat when the steam port, overflow tank, expansion tank, or swirl pot setup is not right. This swirl pot helps remove air pockets, keeps coolant moving, and helps the cooling system bleed properly. This is on my LS-swapped 1972 Chevy Impala, but the same cooling problem can happen on many LS swap builds, classic Chevy projects, C10 trucks, Caprice, Camaro, Nova, and other engine swap setups. In this video: Why LS swaps overheat What a swirl pot does How trapped air causes cooling problems Why the LS steam vent matters Overflow tank vs expansion tank vs swirl pot How coolant flow and bleeding the system affect temperature Common LS swap cooling mistakes This is a real-world LS swap overheating fix for anyone fighting trapped air, steam port routing problems, coolant bleeding issues, or inconsistent engine temperature. Before you blame the radiator, fans, or water pump, check if your LS cooling system has trapped air or the wrong steam port setup. Chevys R Us — LS swaps, classic Chevy builds, DIY mechanic tips, and real-world automotive repair. Put God First. 00:00 LS Swap Overheating Problem 00:39 Why LS Swaps Trap Air 01:23 Stop Wasting Money on Cooling Parts 02:05 Overflow Tank vs Expansion Tank vs Swirl Pot 03:18 What a Swirl Pot Does 04:15 Why Trapped Air Causes LS Overheating 05:00 Mounting the Swirl Pot Higher Than the Radiator 06:10 Swirl Pot Hose Fittings and Parts 07:15 How to Plumb a Swirl Pot on an LS Swap 08:20 LS Steam Port Routing Explained 09:25 Blocking Off the Radiator Steam Port 10:15 Filling the Cooling System With Coolant 10:55 Swirl Pot Results and Cooling Test 12:00 LS Swap Overheating Fix Recap 13:15 Steam Vent, Air Pockets, and Coolant Flow 14:00 Final LS Swap Cooling Tips