I have a good running k301 hear that makes a squeaking sound when you start it or throttle up, at first I thought it was the belt but I cleaned the pulley's and installed a new belt but it didn't change. I then thought the muffler was leaking so I tried a different and it still does it and it does it with no muffler. I'm now leaning towards the head gasket, what do you guys think?
https://youtu.be/Z2MCQkip3oI