I’ll check valve lash since the covers alreadyoff and check valve timing next. Gotta grab my electric impact from work today too.Hey, you know what you should do? Check the timing belt.........
LOL, just thought I'd also join the band wagon
But seriously, if the tensioner let off and it slipped immediately while cranking you'd have this problem. I had a tensioner bolt actually break off one time. The actual block broke. You likely don't have that issue, but pull the upper timing cover and line it up to see.