I just replaced my head gasket as some of you have probably gathered.. I followed the torque specs, stages, and sequence to the letter. However, on the passenger side of the block there is an oil slick that wasent there before, which would lead me to believe there is a leak.... i dont get it.. The head was resurfaced, and i know that i followed everything properly.. Is there a possibility that the head needs to be retightened after it has been driven a few miles? Any ideas would help me out a lot... Thanks everyone..