Re: timing chain/head gasket R&R So close but yet so far - Saab NG900 & OG9-3 Bulletin Board - Saabnet.com
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Re: timing chain/head gasket R&R So close but yet so far
Posted by Paul B. (more from Paul B.) on Thu, 6 Jan 2011 16:29:37
In Reply to: timing chain/head gasket R&R So close but yet so far, Drake, Thu, 6 Jan 2011 14:26:59
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I'm guessing, but I think the idea behind using Torx head bolts is that the head loans itself to fast assembly times with power tools and is resistant to stripping when they are used. A big deal when you are trying to minimize assembly costs and are dealing with many hundreds of parts a day.
I doubt that tamper proof has anything to do with their use inside a valve cover.
The bolts might have heavy duty thread lock compound on them to keep them from vibrating loose. Application of heat is usually needed to defeat the thread lock.
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