Range Rover P38
LAND ROVER V8
7
DESCRIPTION AND OPERATION
Front cover
The front cover is bolted to the front of the cylinder
block and is sealed to the block with a gasket. The
disposable, full-flow oil filter canister is screwed to the
front cover, which also carries the oil pressure switch,
oil pressure relief valve and crankshaft front oil seal.
The gear type oil pump is integral with the front cover
which also has an internal oilway to direct oil from the
oil cooler to the filter.
Oil sump
The oil sump is bolted to the bottom of the cylinder
block and the front cover and is sealed to both
components with a one-piece gasket. A removable
baffle to prevent oil surge is fitted in the sump. The oil
pick-up pipe and strainer assembly is positioned
within the sump. The assembly is attached at the
pick-up end to a stud screwed into number four main
bearing cap and at the delivery end to the oil pump.
The oil drain plug is located in the bottom of the sump
and is sealed with a washer.
Pistons and connecting rods
Each of the aluminium alloy pistons has two
compression rings and an oil control ring. The pistons
are secured to the connecting rods by semi-floating
gudgeon pins. Each gudgeon pin is offset by 0.5 mm
(0.02 in). The top of each piston is recessed, the
depth of recess determining the compression ratio of
the engine. Plain big-end bearing shells are fitted to
each connecting rod and cap.
