Abstract: A flushing and recharging system for an automotive engine includes a tee branch inserted in the coolant return hose from the cylinder block of an engine to the radiator, and which is employed to flush and recharge the cooling system with coolant fluid, provision being made for reversing the fluid flow through the return hose, the supply of scavening water optionally being a flow pulsating in pressure and velocity. The waste coolant scavenged from the cooling system is separated out to remove particulate matter and to separate petroleum products from the water base of the coolant fluid.