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Re: Sodium and Silicone and Torsen
From: Janet Scruggs <email@example.com>
>I understand the lead
>deposits coat the valve stems to form a rather tight 'running fit' between
>the stem and valve guide which further promotes heat transfer from the
>valve to the head.
My understanding is that the lead lubricated the valve seats. Thats why you
have to put in hardened valve seats when you switch from leaded to unleaded
gas. Don't know how the lead would have gotten up to the valve stem/guide.