New Beetle L4-1.9L DSL Turbo (BEW) (2006)
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Thread oil pressure gauge into oil filter bracket in place of oil pressure switch.
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Connect brown wire of tester to ground (GND) (-).
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Connect voltage tester (V.A.G 1527B) using assist cables from (V.A.G 1594C) to battery (+) and oil pressure switch.
LED must not light up.
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When the LED illuminates, replace the oil pressure switch (F1).
If the LED does not light up:
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Start engine and slowly increase engine speed.
The LED must illuminate at 0.55 to 0.85 bar positive pressure, otherwise replace the oil pressure switch.
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Increase engine speed further.
At 2000 RPM and an oil temperature of 80° C, oil pressure must be at least 2.0 bar.
At higher engine speeds oil pressure must not exceed 7.0 bar
If the specified values are not reached:
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Check screen in intake line for soiling => [ (Item 11) Suction line ] See: Engine Lubrication/Oil Pump/Service and Repair/Oil Pan and Pump
Assembly Overview.
‹› Also, mechanical damage e.g. bearing damage can also be the cause of too low oil pressure.
If no malfunction can be found:
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Replace oil pump.
If the specification is exceeded:
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Check oil channels.
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If necessary, replace oil filter bracket with pressure relief valve => [ (Item 4) Oil filter bracket ] See: Engine Lubrication/Oil Filter
Housing/Service and Repair.