Why is there no flow through the cooling system?
Why is there no flow through the cooling system? It overheats, and there doesn't appear to be flow through the cooling system. The upper radiator hose is extremely hot, the lower radiator hose is cold. The thermostat has been replaced 3 times now. They have all been put in boiling water, and they all opened. What to do when your cooling system is not working? Start your engine. When the engine is warm, visually watch the coolant in the cooling system to see if it is circulating. Tip: If the coolant is not circulating, then it may need a new...