Head bolt question
Thread Starter
Pro
Joined: Jun 2007
Posts: 713
Likes: 9
From: Saratoga Springs Ut
Head bolt question
I putting mine back togeather after a lifter swap, and I over turned the first bolt by mistake. I went like a 180 degrees instead of 90 because my batteries were low on my Torque wrench and it diden't beep at me, so I backed it out. Should I replace the 1 bolt or am I ok to reuse it?
Tech Contributor
Joined: Dec 2006
Posts: 10,962
Likes: 29
From: Van Buren Arkansas
Wounded Warrior Escort '11
Yes, I agree with replacing it but the torque sequence and settings, the first pass only is done to FtLbs of torque. The remaining turns are all done by "degrees" and the last pass is extremely difficult. So the question comes, at which part of the sequence did you turn it a full 180 deg?
Thread Starter
Pro
Joined: Jun 2007
Posts: 713
Likes: 9
From: Saratoga Springs Ut
Yes, I agree with replacing it but the torque sequence and settings, the first pass only is done to FtLbs of torque. The remaining turns are all done by "degrees" and the last pass is extremely difficult. So the question comes, at which part of the sequence did you turn it a full 180 deg?
Last edited by TheDEfan; Oct 4, 2011 at 02:08 PM.
Tech Contributor
Joined: Dec 2006
Posts: 10,962
Likes: 29
From: Van Buren Arkansas
Wounded Warrior Escort '11
So did you stop there or continue? Question is in regards that if you stopped there, now the head is not down properly at that point. I tend to doubt you warped it. Depends on where you stopped the process and what the status is now. As stated, if you used ARP bolts, no issue, but OEM, then personally speaking, at that second turn, you are turning in degrees, not waiting for a beep from a torque wrench. The implication is that you were torquing to FtLbs instead of degrees which is wrong therefore you won't know what the final turn should be.
Drifting
Joined: Jan 2008
Posts: 1,722
Likes: 138
From: Florida
St. Jude Donor '09
No bolt can be re-used when taken past its elastic limit and yield point during tightning, regardless of the manufacturer.
Perhaps you should read up on fastener tensioning before making incorrect recommendations like this one.
Perhaps you should read up on fastener tensioning before making incorrect recommendations like this one.
Last edited by ipuig; Oct 5, 2011 at 04:53 AM.
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Thread Starter
Pro
Joined: Jun 2007
Posts: 713
Likes: 9
From: Saratoga Springs Ut
So did you stop there or continue? Question is in regards that if you stopped there, now the head is not down properly at that point. I tend to doubt you warped it. Depends on where you stopped the process and what the status is now. As stated, if you used ARP bolts, no issue, but OEM, then personally speaking, at that second turn, you are turning in degrees, not waiting for a beep from a torque wrench. The implication is that you were torquing to FtLbs instead of degrees which is wrong therefore you won't know what the final turn should be.
Last edited by TheDEfan; Oct 4, 2011 at 06:33 PM.