White foam can mean that ur gasket is going and when the engine hits the combustion cycle it is also heating up and foaming the coolant.Click to see full answer. Keeping this in consideration, what does white foam in Radiator mean?The foam could be oil in the coolant. Pop off your oil cap and have a look in there. If there is foam in there, then you have a problem. Foam in just the coolant is probably just crap getting stirred up from the flush.One may also ask, how do you know if your Headgasket is blown? How To Tell if a Head Gasket Is Blown: Coolant leaking externally from below the exhaust manifold. White smoke from the exhaust pipe. Bubbles in the radiator or coolant overflow tank. Overheating engine. White milky oil. Fouled spark plugs. Low cooling system integrity. Similarly, how do I stop my coolant from foaming? Let your chips dam up the two downhill runs into the chip tray. Add a damn there if needed. If your coolant is foaming, “filtering” it through chips before it hits the chip tray is very helpful to reduce foam. Chips pop air bubbles.What causes foam in engine oil?Foaming in oil is mainly due to the accumulation of small air bubbles at the surface of the lubricant. It is caused by excessive agitation, inadequate levels of lubricating oil, air leaks/ingress, contamination or cavitation. Foaming is an undesired phenomenon in engines, hydraulics, turbines and cooling systems.