Quote:
Originally Posted by Lapkritis
Henry, what would you describe the relationship between the o-ring and the threads on the through-bolt as? Do you compress a tomato with a knife?
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After installation, the relationship between o-ring and threads is a non-issue. I have never seen a leaking case o-ring precipitated by cuts (your knife analogy) from case bolt threads. I have seen leaking precipitated by seal hardening and sealing surface degradation (mostly mag cases). Even with case degradation, we see good sealing with the Dow 55.
Truth be told, after the first couple of hours of engine life, you rarely see case o-rings leak no matter what lubricant is used. Most leaks are caused by poor installation techniques. We just like the insurance offered by using Dow 55.