I would be happy to help, but the policy is everything has to stay online. I hope you understand.
However, I can help you this was also. I listened to your video. I think you are hearing the top of a piston hitting a valve. I can't be certain, but that is what it sounds like.
In this case, we have two ways it can be checked. First, you could use a borescope camera. If you remove the spark plugs, you can place the camera into the cylinders and see if there is evidence they are hitting. Or, you can perform a compression test. If I am correct, I feel you will find no compression on one or more of the cylinders.
Here is a link that explains how to perform a compression test. You will need a compression gauge, but most parts stores will lend one to you free of charge.
At this point, this is what I feel needs done to confirm what I'm saying is the cause. If it is, we need to remove the cylinder head and see if it can be salvaged.
Let me know. If you have any questions, let me know.
Saturday, November 26th, 2022 AT 8:34 PM