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V · 02-28-2007, 08:26 AM

on an LS1, you do not ever want to use the old bolt as the final installed bolt. Both procedures are used as one...

whenever changing the pulley, to reinstall the new pulley, you use the old bolt first and torque it down to 240 ft/lbs to ensure that the pulley is fully seated. Once that is done, you remove the old bolt and install a BRAND NEW bolt. the new bolt is torqued to 37 ft/lbs, then rotated another 140 degress.

i believe this is basically because GM decided to use torque to yeild bolt, just liek they did with the stock headbolts, which should also never be reused.

02-28-2007, 08:26 AM	#5
V Stalker Join Date: Aug 2004 Posts: 12,080 iTrader: (12)	on an LS1, you do not ever want to use the old bolt as the final installed bolt. Both procedures are used as one... whenever changing the pulley, to reinstall the new pulley, you use the old bolt first and torque it down to 240 ft/lbs to ensure that the pulley is fully seated. Once that is done, you remove the old bolt and install a BRAND NEW bolt. the new bolt is torqued to 37 ft/lbs, then rotated another 140 degress. i believe this is basically because GM decided to use torque to yeild bolt, just liek they did with the stock headbolts, which should also never be reused. Last edited by V; 02-28-2007 at 08:28 AM.