[hurryinhoosier62]

Originally Posted by jhein

So if the bearings are not faced with lead then that that would mean it's coming from deeper layers of the bearing (assuming that's still got lead) or somewhere else?

They mentioned fuel as a source. I buy my gas in bulk and it's 92 octane non-ethanol gas. I add Sta-bil and Lucas fuel treatment. I guess those could contain some lead.

They also mentioned blow by. My cold cranking compression was 175 psi +/- 2 psi. So I doubt I have excessive blow by.

Lead was taken out of babbitt years ago. We used to have to re-babbitt Model T and Model A connecting rods; the original composition was lead faced. The replacement babbitt was tin and antimony.