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Author Topic: Stripped valve cover bolt hole  (Read 2049 times)

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Stripped valve cover bolt hole
« on: June 01, 2010, 09:41:18 AM »

Ok, I'm an idiot, I over torqued one of my valve cover bolts and the thread gave way.   :pullhairout: :pullhairout:  Good thing is that it was the bolt on the edge, the one that holds down the rubber cam end seal. So its pretty easy to get at and it goes right through the head. So....

What is the best option?

1) Retap the hole to the next size up (from a 6mm to a 8mm hole)
OR
2) Use one of those inserts, Helicoil, kits and keep the standard bolt?


I'm cheap and as proven by my latest deed, dont know very much, so I'm leaning to the retapping. Sounds simple enough for me to not mess up.... LOL

Any and all suggestions welcome.
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Re: Stripped valve cover bolt hole
« Reply #1 on: June 01, 2010, 10:08:04 AM »

oh, option 3) Loctite Form-a-thread. Seems like its the JB weld of the thread world. Anyone know if this stuff works?

http://www.amazon.com/Loctite-Thread-Stripped-Thread-Repair/dp/B001Q5GOFS/ref=pd_sbs_indust_3
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antiq

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Re: Stripped valve cover bolt hole
« Reply #2 on: June 01, 2010, 02:14:54 PM »

my preference is always to use the helicoil. which does require tapping to a larger size to install the helicoil.BTW smaller bolts are not tightened as much as larger bolts.
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Re: Stripped valve cover bolt hole
« Reply #3 on: June 01, 2010, 11:53:00 PM »

Also look up "timeserts." They are suppose to be really stong.  One you fix it, or before you fix it, you really should invest in a torque wrench (one measured in inch pounds).  It will save you tons of headaches.  Ed
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Re: Stripped valve cover bolt hole
« Reply #4 on: June 02, 2010, 09:38:51 AM »

Live and learn right. I'll never do that again. Let this be a warnig to you all.

Funny thing is that, I knew better. I knew that those bolts didnt need that much torque, but I over did it anyway. When I told one of my riding buddies about this, he just shook his head in disappointment.

Helicoil is on its way.
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Re: Stripped valve cover bolt hole
« Reply #5 on: June 04, 2010, 05:48:50 AM »

I wish ya success.
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Re: Stripped valve cover bolt hole
« Reply #6 on: June 04, 2010, 11:59:52 AM »

I am a helicoil god! all hail!  :iconworship: LOL

Kit arrived earier than expected. Hole is Drilled, tapped, and coiled. Took me about an hour to do. But the process itself probably took less than 5 mins. I took my time, and second guessed everything I did this time around. Man did I learn a good lesson. woo hoo its go time!  :ridin:
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Re: Stripped valve cover bolt hole
« Reply #7 on: June 04, 2010, 01:17:37 PM »

What...no pics X-|  :)

I haven't installed a helicoil before, but I'm sure I'll have to eventually down the road. Glad you have it all straightened out now.
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Re: Stripped valve cover bolt hole
« Reply #8 on: June 04, 2010, 02:51:19 PM »

Just went and looked as those 'timeserts', thats good stuff, but cannot get them down here in NZ. They certainly look stronger than helicoil and will not pull out like helicoil.
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Re: Stripped valve cover bolt hole
« Reply #9 on: June 05, 2010, 01:08:25 AM »

So it did work? Outstanding!!!
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Re: Stripped valve cover bolt hole
« Reply #10 on: June 05, 2010, 10:24:13 AM »

Timeserts are the hot ticket, IMO. We use them at work all the time. We gave up on Helicoils many years ago. As well, Timseserts come on oversizes on the outside threads for when your hole is REALLY knackered.
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Re: Stripped valve cover bolt hole
« Reply #11 on: June 07, 2010, 10:37:10 AM »

I popped in the helicoil, it was $25 vs a $60 timesert.
pics tonight  :iconwhistle:

Hope it holds up.
I think it should, there isnt that much stress - 90in-lbs(about 7.5ft/lbs) - know that I know the right torque :P
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