Crankshaft, sump and oil pump components (Engine - Td5)

Oil Pressure switch

The oil pressure switch is located in a port on the outlet side of the oil cooler housing. It detects when a safe operating pressure has been reached during engine starting and initiates the illumination of a warning light in the instrument pack if the pressure drops below a given value.

Crankshaft, sump and oil pump components

The crankshaft, sump and oil pump components are described below:

Sump The sump is a wet-type, of aluminium construction and is sealed to the engine block by means of a rubber gasket and twenty fixing bolts. The four bolts at the gearbox end of the sump are longer than the other sixteen bolts.

The sump gasket incorporates compression limiters (integrated metal sleeves) at the bolt holes, which are included to prevent distortion of the gasket when the sump to cylinder block bolts are being tightened.

The oil drain plug is fitted at the bottom of the oil sump reservoir. An oil return drain pipe is also attached to the oil sump which returns oil from the centrifugal filter.

Stiffener Plate The stiffener plate assembly provides lower engine block rigidity and utilises dowels to align it to the bottom of the cylinder block. A rotary oil pump is integral with the stiffener plate and an oil pick-up and strainer assembly is fitted to the underside of the stiffener plate. The stiffener and oil pump assembly is secured to the cylinder block by 22 bolts.