I am having overheating issues with my 1993 3.4L V6 Camaro,Once I start the car with no AC or Heat on while at idle or driving the car will overheat, almost to the red line. When I get onto the highway it will slowly drop all the way down to operating tempeture.Also if I turn on either the AC or Heat while driving around town the car will not overheat.On my way home I turned everything off and let the car overheating, when I got home I opened the hood and the fans are going but still overheating.Also the major sympton is that the water pump will click on and off when I have AC blowing. It will click on and off every 10 seconds or so.New waterpump?
I should change the water pump. The vains or fins in the housing are probably worn. You will see that they are when you pull off and flip it over. Those fins is what keeps the water moving......Steve
Try a thermostat first. The heater bypasses the thermostat and the engine runs cool. Its a cheap fix and if thats not the fix go with troubleshooting the radiator, colapsed hoses, water pump! Be sure to install it correctly!
