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Re: Torque Specs and tightening sequence, Found here
the heads are torqued down in a torquing sequence, then a turn...You tighten all the bolts starting in the middle and crossing your way out to 40 ft/lbs, then again to 60, then again to 90. At that point you then turn the bolts an additional 120 degrees. If anyone ever needs it it is in any chiltons/haynes manual that you can find.
Team NoVa
2000 Firebird- Intake, Pacesetters, !cat, full 2.5 to flowcrapster, 1.9 rockers, LS6 springs and Intense modded retainers, WS6 speedlines, T/A bumpers and hatch, 5 spd swapped, SOON TO BE nitrous'd and cammed.
Re: Torque Specs and tightening sequence, Found here
Yup its called Torque to Yield. Basically the bolts are made to stretch, and allow a more forgiving torque spec, atleast from my sources. So say its 120 degrees, you dont have to be EXACTLY 120 degrees, 123-117 and you'll be fine, especially with a simple, low rpm, low hp (all relatively speaking of course) engines.
Cummins use an impact to torque the 90 degrees on their 15Liter ISX head. A degree spec is a degree spec, so I'm not against using power tools when it comes to final torque.
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