Lubrication System - Alfa Romeo 159 Training Material

ENGINE

Lubrication system

Oil pump
1. Pressure regulator valve
2. Stator
3. Rotor
FUNCTION: The oil pump circulates the flow needed for forced lubrication of the various engine parts.
LOCATION: The oil pump is built into the timing chain box.
FEATURES: It is operated by the crankcase by damping torsional vibrations. The pressure regulating valve can be
accessed from the outside and opens a range of pressures from 4 to 6 bars. The two main lubrication channels are
supplied by the channels in the cylinder block casting. These two main channels supply the entire engine lubrication
system, the bearings, cylinder head, balancing shaft and chains.
The oil pump is built into the timing chain gear assembly. The pump gears (one internal and one external) are fitted
on cams. Displacement is variable according to engine speed.
1. Pump service opening cover
2. TDC piston signal for timing
3. Oil pressure regulating valve
4. Stator
5. Rotor
6. Oil pump drive gear
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