Oil cooler. Volvo Penta TWD1620GH, TWD1630P, TAD1630G, TAD1631G, TAD1630GE, TWD1630G, TAD1631GE, TAD1630P, TAD1630V, TWD1630V

Group 22 Lubrication system

The piston cooling valve opens when engine revs have increased to slightly above idling speed. Oil flows through the piston cooling duct to the nozzles for the pistons. Here, the oil is sprayed into the annular cooling channels. The oil then passes through a duct to the bypass oil filter. This filter has a low through- flow speed and gives a high degree of filtration.

The oil cooler maintains the temperature of the lubricating oil at a relatively low level which is advantageous from the point of view of wear, and also maintains the oil’s beneficial qualities.

The two full-flow filters have a bypass valve which guarantees lubrication of the engine should the filters become blocked.

Oil cooler

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Bypass valve for oil cooler

By-pass valve for oil filter

Reduction valve

Piston cooling valve

Oil from the block

Oil from the oil cooler

Coolant flowing into the oil cooler

Coolant flowing out of the oil cooler

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