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Cross Threaded Head Bolt

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Old Sep 26, 2008 | 12:22 AM
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WS6 Rampage's Avatar
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Default Cross Threaded Head Bolt

So, I'm assembling the motor today and while I was threading in the smaller M8 head bolts I noticed that the 4th one back on the driver's side seated for a sec but then wouldn't stop turning. Now I know that this is a nightmare for anyone tearing down a motor, but is it ok to leave this one bolt the way it is instead of pulling it back out and going through the entire hellish process? I'm sorry if this is a stupid question to some but I'm just not sure. Additionally I'm curious as to what I need to do to fix this issue.

Thanks!
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Old Sep 26, 2008 | 12:33 AM
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I would pull the head and install a helicoil.
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Old Sep 26, 2008 | 01:36 AM
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if it keeps on turning, there is no clamping force present. So yes, definitely helicoil it.
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Old Sep 26, 2008 | 01:57 PM
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Originally Posted by Grimes
if it keeps on turning, there is no clamping force present. So yes, definitely helicoil it.
Thats what I was afraid of. I appreciate the advise. Thanks.
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Old Sep 26, 2008 | 04:28 PM
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Originally Posted by WS6 Rampage
Thats what I was afraid of. I appreciate the advise. Thanks.
No prob, good luck - it'll be worth it in the end!
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Old Sep 29, 2008 | 12:25 PM
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most definately!


sucks to hear
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Old Sep 29, 2008 | 09:38 PM
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ya thats big time sucky I always run a clean out tap down all my holes and blow them out with some air after. you most definitely need to run a coil in it. also brush some light oil on the head bolts when you install them to make sure they torque down evenly. If they are not all the same the head could warp.
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