"Coolant leak" but normal levels

The water pump seal may leak ever so slightly, I don't think you have to worry if there's no reduction in the fluid level.

 

JC91006 X2

This is where experience should be used to determine whether it's something in need of replacement or not. My theory for coolant issues......
If it's wet, get ready to replace it.
If it's crusty, roll with it and monitor.

I've had a handful of HV battery replacement jobs where I've seen pink residue on the inside of the water pump pulley. No crisis. I inform the owner, use a flashlight to show them exactly where it is so they can monitor it and monitor the coolant level. There's typically plenty of time available to make this a planned repair at some future date when it needs it.

 

The residue actually could be from a previous replacement, where you got some coolant on the pulley and it dried there.

 

Exactly. On the 2nd inverter pump change there was some pink crust on the bleeder valve. Leak or a few drops left behind from the 1st change that dried out? Who knows. This time I rinsed off the outside of the bleeder valve and all around the pump really well with some water, and dried them thoroughly. If on inspection later there are crystals I will know it wasn't from the work I just did.

 

Great opportunity for a thorough detailing of the engine compartment... That way if it's going to be a problem you'll be certain it's new if you can see it return after cleaning it.

 

Be aware do not use the overflow tank as a measure of ice coolant capacity. As in a g2 it hardly moves even if the rad is very low.

Take the black plastic cover off the top of the radiator and check the rad itself for coolant by opening the rad cap.
Not necessary to put the screws back in that cover when you close the hood it traps that cover very well.
I leave the screws off so I can check all the fluids fast once a week.