Engine Oiling System

See illustration. Gear oil pump located in timing chain cover, draws oil through screen and pipe assembly (or over top of screen if clogged) and a drilled passage in crankcase connecting to drilled passage in timing chain cover. All oil is discharged from pump to cover assembly. Spring loaded relief valve (in cover) limits oil pressure to a maximum of 40 lbs. per square inch. A by-pass valve (in cover) opens when filter becomes clogged (15 lbs. pressure difference between filter inlet and outlet) to by-pass unfiltered oil directly to oil galleries in engine. Filter (mounted on oil pump cover) supplies oil through oil pump cover and drilled passages in crankcase to two main oil galleries that run full length of the crankcase.