 head bolts |
 Jun 26, 2010 - 9:46 AM
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Enthusiast Joined Apr 7, '10 From grove city Currently Offline Reputation: 0 (0%)  |
do you need to replace the head bolts every time you take them out on a 7afe?
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Jun 27, 2010 - 7:08 AM
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 Moderator  Joined Oct 1, '02 From fall river, ma Currently Offline Reputation: 13 (100%) |
OEM head bolts are torque to yeild bolts.
meaning, you tighten them to a specific # value, then another 90*. what that last 90* is stretching the bolt. any bolt thats torque to yeild should be replaced. (especially if you dont know if they have ever been loosened and reused before.) IMO reusing them is a bad idea. they are relitivly cheap, and if one were to bottom out from overstreching it and snap, it would get ugly. -------------------- Former Team 5SFTE pro member ;)
 13.6@108MPH, 5SFTE Powered |
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Jun 27, 2010 - 8:17 AM
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Enthusiast Joined Mar 11, '06 From Way South Chicago Currently Offline Reputation: 0 (0%) |
QUOTE (presure2 @ Jun 27, 2010 - 8:08 AM)  OEM head bolts are torque to yeild bolts. meaning, you tighten them to a specific # value, then another 90*. what that last 90* is stretching the bolt. any bolt thats torque to yeild should be replaced. (especially if you dont know if they have ever been loosened and reused before.) IMO reusing them is a bad idea. they are relitivly cheap, and if one were to bottom out from overstreching it and snap, it would get ugly. having dealt with snapped head bolts...they're not THAT bad. you can usually lift the head directly off and then use vice grips to spin them out or a brass drift to get them turning and then out...or very delicately with a sharp steel punch. -------------------- |
Posts in this topic
jms7436 head bolts Jun 26, 2010 - 9:46 AM
Bitter is the torque spec a lb/ft +degrees of a turn? if ... Jun 26, 2010 - 10:49 AM garin it is always a good idea to replace head bolts whe... Jun 26, 2010 - 10:55 AM jms7436 ya you torque them to 22ft/lbs then 90 degrees and... Jun 26, 2010 - 9:47 PM Bitter yes Jun 26, 2010 - 10:39 PM Smaay it is recommended to replace them, but i re-used t... Jun 26, 2010 - 10:40 PM
jms7436 well the thing is i just rebuilt my 7a and i got p... Jun 27, 2010 - 9:54 PM |
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