Stripped a header bolt hole - Team Camaro Tech
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post #1 of 6 (permalink) Old Oct 29th, 00, 04:02 PM Thread Starter
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Marty
 
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Guys,

I was installing new header gaskets with ARP bolts this weekend. The heads are TrickFlow aluminum pieces. Was using my 1/4" rachet when I felt it break loose - I stripped the bolt hole in the head. What are my options to "fix" this?

Feeling pretty stupid at the moment....Marty

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Marty

69 Camaro, 350, TrickFlow heads, T5, 3.73
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post #2 of 6 (permalink) Old Oct 29th, 00, 04:21 PM
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Sometimes you can put a stud in the hole and catch a couple threads at the bottom of the hole. A stud will hold quite a bit like this. Otherwise you'll have to put a thread insert in the hole. Talk to a local auto machine shop and they'll have a thread in insert that you have to drill out the hole bigger, put the insert on a bolt, and just turn it in. Helicoil is the best, but expensive and harder to use, but it might be worth the trouble with these heads though.
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post #3 of 6 (permalink) Old Oct 29th, 00, 06:09 PM
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David Pozzi
 
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Take a good look in the hole. Maybe you only pulled out one thread and can chase out the threads and put a bolt back in.

I'd like to add that anyone with aluminum heads make shure you are using long enough bolts or the bolts will tend to loosen and/or strip.

Of course, when using longer header bolts, make shure they don't bottom out.
I think some Big Block bolts are a bit longer.
I've found that helicoils on aluminum castings help keep bolts from coming loose.
The aluminum doesn't hold the bolts very well by itself.
David

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[This message has been edited by davidpozzi (edited 10-29-2000).]
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post #4 of 6 (permalink) Old Oct 30th, 00, 06:26 AM
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I had to "heli coil" one of mine before. Not a big problem if you have a straight shot on that bolt. The back ones are a different story though.



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post #5 of 6 (permalink) Old Oct 31st, 00, 04:33 PM
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That's why Edelbrock heads come stock with Helicoils in the header bolt holes. Also a good idea to use some anti-seize on the header bolts (should use it any time you thread a bolt into aluminum or into header bolt holes in either iron or aluminum heads).

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post #6 of 6 (permalink) Old Nov 1st, 00, 03:36 AM
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Thatís one of the reasons I went with the Edelbrock heads. Antisieze lubricant is a definite must for spark plugs and bolts. No sense in screwing up a $1000 set of heads for a $2.39 tube of antiseize.

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Tim
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