My upper and lower radiator hoses suck in(collapse) like theres a vacum after the car cools down completly! I rebuilt the motor this winter and put a CSR Electric water pump on and filled up the coolant from the thermostate housing (160* TStat). The car runs great and stays right at 170-175 Oh and I also deleted the heat Just wanted to know If this is normal? The hoeses open back up once the motor warms up or if I take off the radiator fill cap off. There is NO air in the system im almost positive!

 

I had the same problem...just undo the hose closest to where its collapsing when you see it collapse like that...you might get a little coolant everywhere....but its worth a try! fixed mine when i did it