The noise is fairly loud...I guess more of a hammer knock... Tomorrow morning I will try to post a sound clip or short movie clip so you guys can hear the sound.
Oh and it makes the noise once you apply the throttle...not at idle=no sound

Yeah I do use 87 octane but I thought that did matter since it’s not a high performance engine and im certainly not pushing it. As for the oil pump whats the best way to check that?

Thanks so far!