Engines 1.6/1.8/2.0 l
Oil is supplied under pressure to the crankshaft, connecting rods, phase shifters, camshaft bearings and valve lifters. All other moving parts are lubricated by gravity or splash. Oil enters the rotary oil pump through a fixed oil intake with a strainer. The oil pump is driven from the crankshaft. The oil pump housing is integrated with the engine front cover. From the pump, pressurized oil flows through the heat exchanger and oil filter. Oil filter with replaceable element integrated with oil cooler (heat exchanger), installed in front of the cylinder block. A bypass valve in the filter cover ensures an uninterrupted oil supply in the event of a clogged filter element. The connecting rod bearings are constantly lubricated by oil entering the shear channels in the crankshaft connecting the main and connecting rod journals. Pressurized oil flows through a restrictor jet into the cylinder head and then is distributed to the camshaft passages. The engine oil pressure sensor is installed at the end of the lubrication circuit. Oil flows into the engine sump through channels in the cylinder head.
Petrol engines 2.8 l
Structural oil pan, cast from aluminum alloy, includes intake pipe and damper shelf. The oil pick-up pipe is bolted to the oil pan and sealed at the junction with the lower part of the cylinder block with an O-ring. The damper shelf is bolted to the top of the oil pan and serves to reduce friction losses at high engine speeds.
A gear oil pump with an internal bypass valve, driven directly from the crankshaft, is mounted on the front of the cylinder block. It takes oil from the intake pipe through the lower channel in the cylinder block and delivers it under pressure through the upper channel of the cylinder block to the left side of the engine, where the oil filter adapter is located.
The oil filter adapter is installed by means of a gasket on the left side of the cylinder block. It includes a top feed cartridge type oil filter. The filter element can be accessed through a screw cap with an O-ring. The oil filter adapter is equipped with a built-in bypass valve that drains excess oil back into the oil pan, as well as an oil pressure sensor. Oil flows through the bottom channel in the oil filter adapter up and then through the filter cartridge. The filtered oil is directed through the upper passage of the oil filter adapter back to the cylinder block.
The oil is directed upward through several passages at the front of the cylinder block to the cylinder heads, to the crankshaft main bearing oil passages and piston lubrication nozzles, to the right and left idler timing gear sprockets, and to the primary timing chain tensioner.
Channels in the cylinder heads direct oil to the circuits of stationary hydraulic lifters (SHLA) and to the camshaft journals. In addition, the oil is directed through two channels with ball check valves into two chambers in which the solenoid valves of the phase shifters with built-in strainers are installed. One of the solenoid valves controls the intake camshaft phase shifter, and the other controls the exhaust camshaft. Both solenoid valves are controlled by an electronic engine control unit. Upon receiving an appropriate signal from the engine ECU, the phase shifter solenoid valve directs oil through a port in the front camshaft bearing cap into a hole in the side of the front main bearing and front camshaft bearing journal surface, after which the oil enters the corresponding phase shifter. Engine oil supplied under pressure to the corresponding channel acts on the blades inside the phase shifter, turning them relative to the sprocket, rigidly fixed on the phase shifter housing.
The channels supplying oil to the crankshaft main bearings also supply oil to the nozzles for lubricating and cooling the pistons. Each such nozzle is installed between opposite cylinder bores and directs a jet of oil into two cylinder bores to cool the pistons.
Oil flows through the front channels of the cylinder block to the front of the engine, where the right and left sprockets of the secondary timing drive are installed, as well as the primary timing chain tensioner. Each timing chain tensioner is mounted to the cylinder block by means of spacers with cavities to form an oil reserve after the engine is turned off. All timing chain tensioners are equipped with small oil jets that deliver a jet of oil to the timing drive components.
Oil returns to the oil sump through the camshaft drive area or through passages in the outer walls of the cylinder block or head.
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