Head gasket was replaced, after 55 miles of driving, oil is found near the stamped side of the block. Coolant is low, white smoke out of the tail pipe, oil level is slightly low, basically everything pointing to a head gasket being the issue.

Its possible the head bolts were not torqued completely, or not in sequence. Can you just re-torque them down or is it necessary to remove the head and clean the surfaces due to the oil and coolant mixing?