Cosworth YB Manual - Section Engine Lubrication
 

PART A - Engine, Engine Management and Turbocharger

Oilpump and Lubrication Circuit

The oil pump is similar in design and operation to the pump fitted to the OHC engine.

The cover of the pump has been revised to connect an additional oil pipe.

Oilpump

1 = Oilpipe
2 = Four spray pipes

There are four spray pipes, one for each cylinder, which allow piston cooling by oil spray.

Position of the oil pump with spray pipe

An oil gallery at the front end of the engine block feeds oil to the valve train and the hydraulic tappets.

The oil pump draws oil from the sump and feeds it through an oil cooler and the full-flow filter into the main oil gallery which distri*butes the lubricant into the oil galleries in the same manner as on the standard OHC engine.

A non return valve in the oil gallery of the cylinder head eliminates oil drain back after the engine is switched off.


The Oilpan

The Ford Cosworth engine has an aluminium oil pan with internal baffle plate .

The gasket set for the oil pan is new.

The gasket features two cork layers with an aluminium gasket sand*wiched between them and 2 addi*tional rubber gaskets.

Since the aluminium oil pan gives the engine block additional strength, the cork/aluminium gaskets must be used.

The sealing wedges of the rear main bearing are part of the rubber seal and not separated as on the standard OHC engine.

Oilpan and gasket

1 = Oil baffle
2 = Cork/aluminium gasket
3 = Front rubber gasket
4 = Rear rubber gasket

Rubber seal - rear main bearing