I agree with Steve. This sounds like an engine knock. One thing I would suggest is changing the oil and seeing if there is metal in it. You should be able to drain it into a clean pan and then swirl it around to see the bottom.
You can drain it through a clean white rag as well. However, draining it into a pan and then pouring off the top part so you can see the bottom of the pan is the best and easiest way to see the metal flake as it will go to the bottom of the pan.
If there is metal in the oil then that is coming from the bearing faces. Unfortunately there is no other repair then to take it apart and replace the bearings as Steve mentioned.
Below is what bearings that are worn look like or worse they have grooves cut into them which means the motor was only a short time away from locking up.
Please let us know if you have questions on this. Thanks
Saturday, September 4th, 2021 AT 3:15 PM