So i am in the middle of doing a head gasket in my 93 m104 engine. .yesterday, i installed the new head bolts. I used the torque wrench to torque them to spec in sequence. i then marked them with a sharpee at the 12 o'clock position and turned them 90 degrees in sequence so that all of them were are the 3 o'clock position. i did that again as recommended so all of the markings are now at the 6 o'clock position where they should be ... here are my questions:

first, despite being very careful and focused...not all the markings on the bolts are exactly at the 6 o'clock position..i guess it has to do with differences in the way the breaker bar was gripped depending on location and some play in the driver-socket-breaker bar combo....so should i go back and further torque them till they are in the exact position?

secondly, is there anyway to verify that everything seated and sealed correctly? i really do not want to see any oil leaks due to a looser than usual head bolt, or minor differences in head bolt tension?

I really appreciate any feedback on this.....

Thanks,

Latief