Cars: Why is my vehicle water reservoir building up pressure and overflowing? - Qs and As

Question: My car's coolant reservoir is building up pressure and overflowing. What could be wrong?..

Answer:
  • Have the radiator cap checked. A loose radiator cap might be the culprit..
  • If the problem persists, seek for professional help. Your auto technician should have a general look at the vehicles' cooling system..