robertb6942

my 74 620 over heats on warmer days and my coolant is disappearing? no smoke from tail and no milk in the oil but i notices the heater isnt blowing hot. water pump?

1974 620 pick up all stock is over heating and the coolant disappears. no smoke outta the tail and it only happens in warmer weather. ive notice in the am i can drive it for an hour and no problems but in the day time when its warmer within 20 minutes im stopping to top coolant off. once there was coolant on the passengers floor idk from where. ive checked all the connections and they look good. another thing actually the heater doesnt blow hot either. wth?