Re: Torque and tightening follow order cylinder head bolts Johnson 5.5 HP ?
Wabbit,<br /><br />You can usually re-use the head bolts. Clean the threads of the bolts and chase the threads in the block. Don't use anti-seize on the bolts, it throws off the torque figures by a wide margin. <br />Tightening sequence is usually done in a circular pattern, starting in the center of the pattern.<br /><br />If these numbers represent the head bolts,<br /><br />1 2 3<br />4 5 6<br /><br />The sequence would be 2,5,4,1,3,6. I like to torque them to 50% of the final torque, then tighten again to 100% of final torque. After motor is run tested and cool , go back and re-check torque.<br /><br />As for the torque force, here are the units you'll be most familiar with.<br /><br />1 inch pound-force = 0.1129848 newton meter <br />10 inch pound-force = 1.1298483 newton meter<br />20 inch pound-force = 2.2596966 newton meter<br />30 inch pound-force = 3.3895449 newton meter<br />40 inch pound-force = 4.5193932 newton meter<br />50 inch pound-force = 5.6492415 newton meter<br /><br />1 foot pound-force = 1.355818 newton meter<br />10 foot pound-force = 13.5581795 newton meter<br />20 foot pound-force = 27.116359 newton meter<br />30 foot pound-force = 40.6745386 newton meter<br />40 foot pound-force = 54.2327181 newton meter<br />50 foot pound-force = 67.7908976 newton meter
