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Date:         Wed, 10 Jan 2001 13:11:30 -0800
Reply-To:     Jim Arnott <jrasite@EONI.COM>
Sender:       Vanagon Mailing List <>
From:         Jim Arnott <jrasite@EONI.COM>
Organization: WetWesties <>
Subject:      Re: Stripped threads in cylinder head, to fix?, now?, how?
Comments: To: "Mladen, Zoran" <>
Content-Type: text/plain; charset=us-ascii

One could also install a Heli-coil. BTDT too. Hence the need for the Keen-sert. Opening the hole to accept a stepped stud leaves you relying on the aluminum threads again. Installing a Heli-coil once again depends upon the integrity of the aluminum threads. Installing a barrel style locking insert gives you a stainless steel threaded hole that is pinned to the aluminum threaded hole of a significantly larger surface area.

FWIW, the stepped stud lasted about an hour. The Heli-coil lasted about a week with daily tightening of the fastener. The Keen-sert has lasted six months (so far) with no maintenance. If it does eventually fail, the only alternatives will be to weld up the hole and start again or replace the head.

Do it right and do it once. Or take the easy half measures and mess with it for years.

BTW, for those who don't know what we're talking about... <>

As always YMMV.


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