I've never heard of the pump causing a noise like this. Even my '12 that was rubbing the cover. I tend to think its a coincidence, maybe clutch slipping like Trevor noted, or something starting to seize internally. It could spit coolant from being overfilled, or from a bad head oring causing the system to be pressurized from cylinder pressure without being hot. What does your trans oil and coolant look like? In any case, you need to pull the side cover to properly inspect everything and change the impeller. I guarantee that the impeller bolt will be frozen it the shaft threads on an '07 bike, and will require the rear of the shaft to be held in a vise to extract. The '07 had a good clutch basket, at least mine did. If thats squealing I'd check the plates for spec thickness and glazing. PM me your email address if you need an engine manual.
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