OK thats what I am going to keep (on) doing in addition to accurate preoiling: when the dampener is 90 deg (1/4 turn) BTDC #1 compression for the pass head & 20 deg ATDC #6 compression for the dr head. thanks guys! RR. EDIT my current & future ones will be magnums so there will be a different procedure, having some one preoil as I slowly turn the crank thru 2 revolutions.