Over heating problem
 

I'm having over heating issues. My car runs at normal temp when driving but overheats at stops. I changed thermostat still overheats I took it to shop and noticed engine fan wasn't kicking on. Could this bee water pump failure? I tried to move the fan by hand it doesn't move is this normal? I put new radiator, fan clutch and fan blade in 1 year ago, due to fender bender. They think is a electric fan but the engine cooling fan is belt driven. I'm a chef and am not close to a mechanic all my car knowledge is mostly from this sight and Internet . My car is a 1979 280 e and has 250000 miles well maintained. I need help!!

Radiator is plugged up, thats why viscous fan dosent operate , to confirm drive at steady speed with fan shroud removed so yo can pull over , quickly shut engine off and feel for cold spots on radiator, or buy cheep infrared temp gauge and do the same and check radiator , it should be evenly hot, any cold spots provided you have a good thermostat means new radiator time

The car us in the shop. I had a coolant leak about a month ago and put bars radiator fix in it could that have clogged it? Or was that a sight that my pump was failing and leaking coolant? I found a article on this site about water pump failure . And I have the same symptoms they talked about! I drive and it stays at normal op temp and when at red lights it starts to heat up . I am ready to go take my car to a different ship because they have no idea what's wrong with it. If I could find out and troubleshoot via Internet then they could to! I'm tight on cash right now so I'm having to use a credit account I have with Firestone! This sucks I need my car and I feel like my first assumption was right about the water pump . Could a faulty water pump be the reason the fans not turning or is this normal and the fans not supposed to move? I seen a YouTube video that showed a bad fan clutch and the fan blade was turning with no resistance?

bars stopleak is the pits and prestones