GM Performance Head bolts question

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Jul 24, 2012 | 04:39 PM

silentkillzr

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From: Wisconsin

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.

Jul 24, 2012 | 04:47 PM

silentkillzr

Thread Starter

Member

iTrader: (2)

Joined: Mar 2009

Posts: 297

Likes: 1

From: Wisconsin

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?

Jul 25, 2012 | 06:02 AM

novaderrik

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Joined: Jul 2007

Posts: 1,293

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From: Howard Lake, MN

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.