I have a squeak that can be heard in the videos below. It's not a belt/pulley, as it remains when running with no belt. I have no misfires/codes showing any issues. Compression is good on all cylinders, but could be possibly a head gasket or intake gasket? I've stethoscoped all potentially obvious external sources (haven't found an exhaust leak) and I believe it could be the crank pulley or a headgasket. I have no issues other than the noise at the moment, but wanted to check with the discoweb board for ideas. Thanks.
https://youtu.be/10lMyACJ874
https://youtu.be/fiiY6kU2SKg
https://youtu.be/10lMyACJ874
https://youtu.be/fiiY6kU2SKg