Crankshaft & Main Bearings Land Rover Discovery L318

The crankshaft is carried in five main bearings. The upper main bearing shell locations are an integral part of the cylinder block casting. The lower main bearing caps are bolted to the cylinder block on either side of the upper bearing shell locations with an additional bolt being inserted into each cap from either side of the cylinder block. The rear main bearing cap carries the crankshaft rear oil seal and is sealed to the cylinder block by means of cruciform shaped seals in each side of the cap. Number four main bearing cap carries the stud fixing for the oil pick-up pipe. Lower main bearing shells are plain while the upper shells have an oil feed hole and are grooved. Crankshaft end-float is controlled by the thrust faces of the upper center shell. The crankshaft timing gear is located on the front of the crankshaft by means of a Woodruff key which is also used to drive the gear type oil pump. The flywheel/drive plate carries the crankshaft position sensor reluctor ring and is dowel located and bolted to the flywheel.