[heymanwatchthis]

Try checking exhaust pipes and manifolds for missing bolts or leaks. I have a funny sound and found a missing bolt on exhaust manifold. An exhaust shop will likely be happy to help you look for leaks.

Regarding water pump, take off accessory belt and check the pump pulley, should give general idea of health. I ordered a Peirberg water pump from Pelican, was much lower price than "Genuine Porsche" - when I took OEM pump off, it was also Peirberg (pump will have a P on casting)!