The 603 uses stretch bolts. Buy new ones -- there are 17 of the, three different lengths. I believe the instructions with the head gasket I just did say torque to 15 ft/lbs, to 35 ft/lbs, then 90 degree turn, wait ten minutes, another 90 degrees. No torque figures for the 90 degree turns, as it will vary and actually doesn't go up much.

Peter


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