Oil pressure getting past the long head bolt on drivers side oil galley

Head bolt holes were not cleaned, tapped and blown out with air. Or bolts to long . We always clean and run thread chasers in all threaded holes. Many times there is crud packed in the bottom of holes.

Take a long skinny screwdriver and twist it down in the hole while blowing it out and then thread chase it. Measure the depth of the hole and then the length of the bolt.