How do I keep this top radiator connector from coming off.
I have a 2001 VW Beetle that has had cooling system problems like crazy. We replaced the radiator, the hoses, and just recently, the inlet. Well now the radiator connector keeps popping off and even looks melted around the edges. The water/ coolant just pours out around it just as fast as I put it in. This car is driving me crazy and costing me a lot of money I don't have. I need advice so I can fix it and sell it. (pic is part I am talking about, not actually mine)