Crankshaft Oil Galley Plugs

These aluminum plugs are peened into the crankshaft, and should be replaced when rebuilding an engine. A sudden drop in oil pressure could be due to a lost plug. All Alfa four-cylinder engines from 1956 on use six plugs per engine; Fiat-Lancia engines from 1968-85 use four plugs.

The plug pictured may be for a different application. For your vehicle, see below.