Join Date: Nov 1999
Location: Chelmsford, MA, 01824
I'm installing a set of Vortec heads on the 327 in my Camaro and I have conflicting instructions on how to torque the head bolts. I haven't put heads on in 17 years so I looked at service manual for my 97 Astro with a Vortec V6. From page 6A-56 it reads:
4. Install the cylinder bolts finger tight.
4.1. Tighten the bolts in sequence to 22 lb. ft.
4.2. Tighten the bolts in sequence using the J 36660 Torque Angle Meter.
4.3. Tighten the short length bolts (11,7,3,2,6,10) 55 degrees.
4.4. Tighten the medium length bolts (12,13) 65 degrees.
4.5. Tighten the long length bolts (1,4,8,5,9) 75 degrees.
The question is should I do the 55,65,75 degree thing, or torque in sequence at 22,44, and 65 ft. lbs.?