Date registered: Dec 2005
Vehicle: 222.132 & 221.122 & 212.025 & 906.633
Mentioned: 3 Post(s)
Quoted: 32 Post(s)
The water pump is at the engine bay :-) Seriously, are you after the main engine water pump? It is driven by the poly belt, you should be able to identify each equipment driven by the belt, one of them the water pump.
I never add water on my cars (know on wood). There is a fault if you need to add water.
You have to add antifreeze even if you were from Arizona, and you have to use the exact correct type of antifreeze (normally identified by color but I would check from a dealer). The antifreeze additives are important even if there is no risk for freezing.
If the coolant warning light is on, there is an issue that needs to be fixed, even if it was only the coolant warning light switch broken and no water leak at all.
What is your car mileage? Perhaps the water pump is leaking, they have a limited life time and aren't that expensive to fix.