obp Motorsport - Coolant Swirl Pot, 8" High x 2.6" Dia w/ Fill Neck, Aluminum
A swirl pot allows air to escape from the cooling system during normal operation. If your radiator is not the highest point in your cooling system, you need a swirl pot.
This aluminum swirl pot gets installed by running the outlet (discharge) from the engine block into the upper (side) inlet on the pot. Coolant swirls around the inside of the pot as it flows to the bottom, allowing air bubbles to break up and escape via the upper vent tube. Coolant is drawn out the bottom outlet, through the radiator, and back to the water pump suction side. The vent can be connected to the radiator air bleed or to a catch tank.
The top of this tank has a convenient built-in filler neck that accepts any standard full-size radiator caps, including their Stant Radiator Caps (sold separately). Simply position the swirl pot so that the filler neck is the highest point in the system, and air will find its way up. The system should be filled until the swirl pot is about 2/3 full. This ensures adequate space for the coolant to de-aerate, while also providing a sufficient volume of coolant in the swirl pot to prevent pump cavitation.
Body measures 195mm (7 5/8") tall x 65mm (2 9/16") OD (less hose fittings and filler neck). Inlet and outlet both accept 32mm (1 1/4") ID hose. Air vent fitting accepts 8mm (5/16") rubber hose.