I have just replaced some hoses and flushed the system,i have then done a 50/50mix of water.and coolant. Car is not over heating, heaters are warm in the car however the exspansion tank is luke warm at best when engine is warm with fans coming on amd off. Im sure it supppse to get very hot which it did before.
when i take return pipe off the thermostat housing i have a little spray off coolant only when engine is revved, could that be issue?