Big difference between water and coolant.
When my water pump failed it leaked out of the weep hole behind the pulley at the bottom of the water pump snout. I had to use a mirror to verify that was where it was coming out. It would get on the belt and the coolant would sling everywhere. With the engine off, using a mirror you may be able to see tracks of rusty or green discharge on the underside of the water pump snout. Just because your water pump is new doesn't mean it can't be defective. I'm not saying that'* it for sure, but it is possible. I'm pretty sure mine was original and the bearing felt fine, no play or noise at all. There is also the possibility that the water pump gasket is leaking, did you use a quality sealant?
As water pumps go, these are pretty easy ones to change. I didn't remove the overflow bottle because I like a challenge, but it would have made it slightly easier to reach.
- It could also be
- bad O-ring or corroded water neck (thermostat housing)
- leaky intake gaskets
- leaky radiator or heater hose
- leaky overflow bottle or windshield washer bottle
- bad seal on the radiator cap
- leaking radiator
When the cooling system gets pressurized, it can squirt out a tiny stream of coolant that can barely be seen. If the stream is pointing at something hot, like an exhaust manifold, it will evaporate on contact. When the engine is cold, there isn't enough pressure in the system to make it squirt, just when it warms up and pressure builds.
I'm sure there are other possibilities, or it could be a combination of several of these faults.