GM Performance Head bolts question
07-24-2012, 04:39 PM
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Car: 1984 Firebird (89 Formula Clone)
Engine: 357
Transmission: m29 T56
Axle/Gears: 3.27 9 bolt Borg Warner.
GM Performance Head bolts question
I cant seem to find any info on these bolts, http://www.summitracing.com/parts/NAL-12495499/
Im not sure if i have to stretch these bolts or not, can anyone help me out with a proper installation of these? Ive got my heads on and torqued to spec using these bolts, i am not sure if i have to loosen them and retorque for a proper stretch.
Im not sure if i have to stretch these bolts or not, can anyone help me out with a proper installation of these? Ive got my heads on and torqued to spec using these bolts, i am not sure if i have to loosen them and retorque for a proper stretch.
07-24-2012, 04:47 PM
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Car: 1984 Firebird (89 Formula Clone)
Engine: 357
Transmission: m29 T56
Axle/Gears: 3.27 9 bolt Borg Warner.
Re: GM Performance Head bolts question
From what ive read on them they are not TTY so im fairly certain i dont need to make another pass after torquing them properly. Any input? 
07-25-2012, 06:02 AM
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Car: 86 Camaro
Engine: 355- hopefully a 5.3 this summer
Transmission: 700r4
Axle/Gears: 3.42
Re: GM Performance Head bolts question
those are the bolts that GM put on probably millions of factory installed small blocks starting in the early 90's sometime- every LT1 and vortec 350/305 got those bolts in them. they aren't torque to yield and they can be reused many times over. just torque them down and forget about them.
07-25-2012, 02:27 PM
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Car: 1984 Firebird (89 Formula Clone)
Engine: 357
Transmission: m29 T56
Axle/Gears: 3.27 9 bolt Borg Warner.
Re: GM Performance Head bolts question
Alright thats what i figured, Thanks for clarifying!
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