How can you confirm you have a faulty water pump
2 Answers
Nightlights127 answered 8 years ago
Get it hot feel the hose to the thermostat see if it is hotter than the bottom hose if so it is thermostat. . Sounds like the coolant is low . Would cause heater to run like crap. Stuck thermostat do it too
I had already changed thermostat thinking that was the problem