Hi everyone this is my first post and engine rebuid so bear with me please. I pulled down and reassembled a 160 powertorque and every thing was ok,it started easy enough and I was going through the throttle range(so impressed with my success) and went to turn it off then decided to keep it running, it backfired and blew the headgasket.It was a new gasket and me not having a torque wrench just tightend the bolts diagonaly 1 grunt.Is 1 grunt enough or to much, or do I have another problem?Thanks for your time
