Hi all, Newbie to diagnosing my own issues so any assistance would be helpful. Just had to add coolant to my 99 GT as it was half empty. Looked underneath and no leak until running and under pressure. It appears to stop once the car is shut off. From what I see it looks like the leak is running off the bottom center pulley, which I presume could mean the leak is originating from my water pump. Is there anyway to tell for sure without having to just replace it? Thanks for any help ya'll can provide.