Passat Sedan 4Motion W8-4.0L (BDP) (2002)
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Remove oil pressure switch -F1- and thread into tester.
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Thread tester into oil filter bracket in place of oil pressure switch.
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Connect brown wire of tester to Ground (-).
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Connect diode test lamp VAG 1527 B using auxiliary cables from VAG 1594 A to battery positive (+) and oil pressure switch.
LED must not light up.
If the LED lights up:
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Replace oil pressure switch -F1-.
If the LED does not light up:
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Start engine and run at idling speed.
At 1.2...1.6 bar pressure LED must light up; otherwise replace oil pressure switch -F1.
Check oil pressure
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Check oil pressure at idle engine speed.
Specified value: minimum 2.0 bar
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Increase engine speed further.
At 2000 rpm and an oil temperature of 80°C, the oil pressure should be between 3.0... 4.5 bar.
If the specifications are not obtained:
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Correct mechanical damage, e.g. bearing damage.
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Replace oil filter bracket with pressure relief valve.
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Replace oil pump if necessary.
At higher engine speeds oil pressure must not exceed 7.0 bar
If the specification is exceeded:
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Check oil galleries.
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Replace oil pump if necessary.