Engine Oiling System
WARNING: This page is about a different car, the 1992 Geo Metro, 1991 Geo Metro, and 1990 Geo Metro. However, it is still accessible from the selected car via links, so may be relevant.
The rotor-type oil pump is driven by crankshaft. Oil is supplied to crankshaft and through a vertical passage to cylinder head components. Oil relief valve is located in oil pump housing.