Lubricating system Design and function

General

The engine is pressure lubricated by a gear-driven pump.

The lubricating oil is cleaned by two full-flow filters. The cooling of the oil is carried out by a round-type oil cooler which is mounted on the oil filter bracket.

The system incorporates four valves:

1.Overflow valve for oil filter

2.By-pass valve for oil cooler (marked SIDE)

3.Reduction valve

4.Piston cooling valve

10 Litre Engines

The lube oil pump forces the oil through the oil cooler and the two full-flow filters before directing it out to all the lubricating pionts of the engine via ducts. The lubrication sustem incorporates four valves:

1.An overflow valve for the oil filters opens to guarantee lubrication if the filters are blocked.

2.The by-pass valve opens when pressure drop across the oil cooler becomes too high, for example in connection with cold starting, When the valve opens, oil is directed past the oil cooler to reach the engine lubrication points more quickly.

3.The ruduction valve opens when the lubricating oil pressure becomes too high and directs any surplus oil back to the oil sump.

4.The piston cooling valve opens when engine revs have increased to slightly above idling speed and when oil pressure has increased. This causes oil to flow to the piston cooling nozzles via a drilling in the engine block.

Six nozzles are connected to the piston cooling duct, one for each piston and from these, oil is sprayed against the underside of the pistons.