Engine knocking on the front of the engine that gets faster when accelerating?

It sounds like you might have a rod bearing, cracked piston or a blown handbasket between two cylinders. Can you please shoot a quick video with your phone so I can hear the engine noise? That way I can tell for sure what's going on. You can upload it here with your response. We can start by doing a compression test. This guide can help you:

https://www.2carpros.com/articles/how-to-test-engine-compression

Please go over this guide and report back. As far as the "tensioner pulley is squeaking" please start another question, we handle one problem per thread.