Block Helicoil Size - Club700XX - Honda TRX700XX Forum
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post #1 of 7 Old 12-01-2010, 07:23 AM Thread Starter
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Block Helicoil Size

I was reassembling my engine and while torquing the cylinder head nuts to 49 ft/lbs the stud stripped out the treads in the engine block half. I need to find out what size helicoil is needed to repair the threads. Is this common or do I need to have my torque wrench calibrated? The other three torqued fine. Just don't want to have to tear down again after I repair with the helicoil. Thanks
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post #2 of 7 Old 12-01-2010, 05:10 PM
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Yes I would get it calibrated just to be safe and I couldnt tell you on the bolt size but guessing from what it torques to I would say the bolt size is 10mm or 12mm but your thread pitch can be a 1.00, 1.25, 1.5 etc Hopefully someone can answer that for you better than me.

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post #3 of 7 Old 12-01-2010, 07:45 PM
 
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Hers a IPB http://www.nielsens.com/fiche_section_detail.asp

here is a link to a helicoil chart. If i knew the thread pitch i could tell you. but the stud seams to be a 12MM. the best person to ask would be EHS or Bo White. http://www.helicoil.in/pdf/HeliCoil%...rket%20Kit.pdf
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post #4 of 7 Old 12-01-2010, 08:12 PM
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If no one knows, you should be able to take the stud to Napa, Fastenal, or a similar store that has a metric thread gauge. Fastenal could probably order you the metric heli coil too.


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post #5 of 7 Old 12-01-2010, 08:38 PM
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I know we were scared torquing the cylinder head nuts to 49 ft/lbs. That seems like alot!

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post #6 of 7 Old 12-02-2010, 04:57 AM
 
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You can Figure out the Thread pitch if you have a Tap and Die set too... taking it to any Hardware store would work too...

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post #7 of 7 Old 12-02-2010, 06:27 AM Thread Starter
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Just wanted to get the helicoil before I tore it back down. I might just install helicoils in all 4 locations and use some thread lock. That should prevent this from happening again.
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