875683 Volvo.Penta Main bearing kit

Illustration 1 g00320188
Schematic Of Oil Flow
(1) The flow to the oil manifold. (2) Filter bypass valve. (3) Engine oil cooler. (4) Cooler bypass valve. (5) Oil pump. (6) Oil pan. (7) Oil filters.
When the engine is warm, oil comes from the oil pan (6) through the bell assembly and pipe to the oil pump (5). The oil pump sends oil through a pipe to a passage in the cylinder block. The oil then goes through the oil cooler bypass valve (4) into the oil cooler (3). The oil goes out of the oil cooler through the oil filters (7). The clean oil then goes through the oil filter bypass valve (2) and into the oil manifold on the right side of the cylinder block.When the engine is cold, the cold oil with high viscosity will cause a restriction to the oil flow through the oil cooler (3) and the oil filters (7). This restriction causes an oil pressure difference in