CVH Engines
OHV engines
Diesel engines
The oil pump draws engine oil from the oil pan through the oil receiver and delivers it under pressure to the oil filter and then to the main channel. Behind the filter is a pressure-reducing valve, which opens when the oil pressure in the system is high, and the oil flows back into the oil pan. When the filter element of the oil filter is clogged, the bypass valve opens and passes unfiltered oil to lubricate the engine.
In the CVH engine, oil is supplied from the main channel through five channels to lubricate the crankshaft bearings. Through inclined channels in the crankshaft, oil is supplied to the connecting rod bearings and, being forced out through the clearances in the connecting rod bearings, is splashed onto the piston pins and cylinder walls.
On OHV engines, lubrication of the drive chain and gears is provided through a nozzle opening in the front inclined tube.
At the same time, through a system of channels, oil is supplied to the cylinder head from the main bearings of the crankshaft to the journal of the camshaft bearing and then, through the holes, oil is supplied to the remaining bearings of the camshaft.
In the CVH engine, oil flows from the camshaft through channels to the hydraulic valve tappets, while the rocker arms and ends of the valve stems are also lubricated through a hole in the tappet piston.
On a diesel engine with a working volume of 1.6 dm³, a non-separable bypass valve is fixed in the feed pipe, which can only be replaced with the pipe.