retap the head ? - Team Camaro Tech
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post #1 of 6 (permalink) Old Apr 21st, 04, 07:20 PM Thread Starter
 
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it appears my edelbrock 6089 performer heads have had an attempt made at one of the header bolts to be retapped, is there a certain method anyone knows of to repair/retap safely ?
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post #2 of 6 (permalink) Old Apr 22nd, 04, 12:50 AM
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The best method of repair is to have a Helicoil installed.

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post #3 of 6 (permalink) Old Apr 22nd, 04, 02:37 AM
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Put one of these in. A permanent repair that can accept continuous re-use of the fastener like tightenening headers when they leak and replacing gaskets. http://www.timesert.com/
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post #4 of 6 (permalink) Old Apr 22nd, 04, 03:53 PM
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I thought they were factory Heli-coiled when new from Edelbrock. I had a set that were.

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post #5 of 6 (permalink) Old Apr 22nd, 04, 06:21 PM Thread Starter
 
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mine definatley are not factory helicoiled, bare aluminum all the way


anyway, got a deal on a thread/tap set from the mac tools guy at my work.

[img]smile.gif[/img] hopefully fixed soon
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post #6 of 6 (permalink) Old Apr 23rd, 04, 12:19 AM
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If the original alum threads are damaged, rethreading them will not let them hold the same amount of torque as if in original condition.

Therefore, you may have to install a thread coil, ie, Helicoil, or a threaded insert.

When drilling/tapping alum, there is an alum tapping oil one can use to prevent binding and breaking the tap. Makes working with alum like a hot knife in butter.

The Helicoil set includes the drill bit of the correct size, the Helicoil tap, the installing tool, and a set of thread coils. You supply, and must, a small punch and hammer to knock off the installing tab. By not doing so will damaged the bolt being used and the thread coil.
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