To avoid running into the problem of a failed water pump, there are a couple warning signs that you can look for. The first is if coolant is leaking around the water pump. Weep holes located on the casing of the water pump will leak coolant when the pump is failing. The second red flag is if the water pump is making more noise than usual. This may be from a defective impeller or an impeller that’s no longer properly attached to its drive shaft.
It’s unlikely that you’ll have to diagnose your car’s water pump problems yourself, but just remember it’s always a good idea to have your water pump replaced when your vehicle’s manufacturer recommends changing the timing belt.