Alfa Romeo 159 Training Material page 89

ENGINE
Teflon ring calibration tool (combustion chamber seal):
Two tools are needed to remove the combustion chamber seal (1) from the injector stem (2):
A: (0 986 616 098)
B: (0 986 616 099)
Tool A holds the seal 1; tool B is used to position it 2 after
fitting.
To refit the seal 1: Position tool A on injector 4.
Pull the new seal 1 up combining tool A on the valve body stem. Do not use lubricant.
To calibrate the seal, push tool B on the chamfered side, turn it by half a turn on one
side and then back to the starting point.
Pressure regulator valve
FUNCTION: The pressure regulator valve controls the fuel pressure inside the rail
according to the ECU mapping independently from the amount of injected fuel and from
the pulses caused by the high pressure pump. Excess flow if sent back to the high
pressure pump suction.
FEATURES: Electronic pressure control valve with compact 2-pin connector.
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