used in conjunction with lead as a babbitting alloy and solders construction radiators & coolers.

Source:           Bearing Overlay, Oil Additive in Gear Lubes,
                      Gasoline Contamination.

 Function:        Lead is a conforming material used to plate
                      bearings.  Lead will appear in new engines while
                      the bearings are melding and conforming.  If lead
                      appears later, misalignment may be indicated.

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