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torque to yield head bolts?

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Old Oct 24, 2009 | 02:54 PM
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Default torque to yield head bolts?

are the stock head bolts on an ls1 torque to yield? the gm bolts on summit say torque to yield. regardless i need to buy new head bolts, i was just wondering if anyone else would be able to use them
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Old Oct 24, 2009 | 05:12 PM
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Yes GM head bolts are torque to yeild, one time use.
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Old Oct 26, 2009 | 10:26 AM
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one time use, and when a friend did his the torque numbers were all over the place. would just buy a set of ARP and b done. they r reusable.
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Old Oct 26, 2009 | 10:49 AM
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Just curious - you say ARP. Can you still pull the heads on a motor that has APR studs installed while the motor is still in the car? Is there enough room to clear the studs?
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Old Oct 26, 2009 | 11:21 AM
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Originally Posted by H'ville TA
Just curious - you say ARP. Can you still pull the heads on a motor that has APR studs installed while the motor is still in the car? Is there enough room to clear the studs?
I have ARP studs and I have removed and reinstalled the heads with the moter in the car.
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Old Oct 26, 2009 | 11:33 AM
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I reused head bolts on my 6.0, I didnt see a real big problem with it but I would recommend replacing them
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Old Oct 26, 2009 | 11:36 AM
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Originally Posted by 00Silv4.8
I reused head bolts on my 6.0, I didnt see a real big problem with it but I would recommend replacing them
You didnt reuse your stock 6.0 head bolts did you?
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Old Oct 26, 2009 | 11:38 AM
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Yep, as stated they are in fact TTY bolts. Some people have re-used them but it's not suggested. You also have 2 options with ARP, studs or bolts. If you dont wanna mess with the studs, just buy the bolts. But yes, heads can be removed with studs installed.
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Old Oct 26, 2009 | 11:45 AM
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DO NOT REUSE your old head bolts for any reason the GM ones are one time use only.
Just buy a set of APR studs or ARP bolts and call it a day.
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Old Oct 26, 2009 | 11:52 AM
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I did and never had any problems
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Old Oct 26, 2009 | 11:57 AM
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That is a VERY VERY bad idea. You may snap a bolt the next time you go to take the heads off. You also dont have the right torque on you heads currently because of the bolt stretch.
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Old Oct 26, 2009 | 12:27 PM
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DON'T reuse your factory headbolts like bigboykilroy said. At the very less, purchase a new factory head bolt kit (one kit per head) from your GM dealer or summit racing. They run about $25 per set. part number GM - 12498545.
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Old Oct 26, 2009 | 12:31 PM
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Yeah, really!! It's too cheap not to use new bolts!!! And I thought I was cheap!!!
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Old Oct 26, 2009 | 12:36 PM
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wow, wish I would known that you could pull the heads in car with studs, thats what I would of done
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Old Oct 27, 2009 | 08:28 PM
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i was just looking to see if i could give away the bolts im not using. looks like theyll just be utilized in the cracked block engine table
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Old May 10, 2011 | 03:29 PM
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http://www.enginebuildermag.com/Arti...rod_bolts.aspx
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Old May 12, 2011 | 12:59 PM
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And that was helpful how???? The thread was regarding HEAD BOLTS, not connecting rod bolts.

Plus, nice resurrection of an old thread for no good reason....derr.....
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Old May 12, 2011 | 01:08 PM
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Lol, derr.... made me laugh, and the link is wrong. Sure TTY bolts can be reused soemtimes. Get out a bolt stretch gauge and check them. The link says only replace if damaged.
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