Texas Speed LS1 Cylinder Head Upgrade - Big Power, Small Change - Part 1
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Each head deck is wiped down with a grease and wax remover, and a final check of the block is made to ensure that it's clean and the locating pins on the heads are in place. The heads are then carefully placed onto the block and the replacement head bolts are slid into position. Head bolts 1-10, which are located in the center and the bottom of the head are first torqued to 22 lb-ft in a specific sequence that goes from the center outward, alternating sides. Once complete, a torque angle gauge (GM tool J 366660-A) is used to rotate the bolts 90 degrees. A second pass on bolts 1-8 puts an additional 90 degrees of rotation in, while bolts 9 and 10 (center head bolts, upper far right and far left) are rotated 50 degrees. Once complete, bolts 11-15 (the top row of bolts closest to the intake valley) are torqued to 22 lb-ft, alternating side to side, working outward. View Related Article
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