Oil pressure and oil pressure switch, checking

Special tools, testers and auxiliary items required 

Fig 1: Identifying Special Tools - Oil Pressure And Oil Pressure Switch, Checking

Courtesy of VOLKSWAGEN UNITED STATES, INC.

• Oil pressure gauge V.A.G 1342
• Voltage tester V.A.G 1527B
• Test adapter kit 1594 A

Test sequence 

Fig 2: Identifying V.A.G 1342 Oil Pressure Tester

Courtesy of VOLKSWAGEN UNITED STATES, INC.

• Remove oil pressure switch F1 and screw into oil pressure gauge.
• Thread oil pressure gauge into oil filter bracket in place of oil pressure switch.
• Connect brown wire of tester to Ground (GND) (-).
• Connect voltage tester V.A.G 1527B using assist cables from V.A.G 1594 A to battery positive (+) and oil pressure switch. LED must not light up.

• If LED lights up, replace 0.7 bar Oil Pressure Switch F1.

If LED does not light up:

• Start engine and slowly increase engine speed. LED must light up at 0.55 to 0.85 bar positive pressure, otherwise replace oil pressure switch.
• Increase engine speed further. At 2000 RPM and an oil temperature of 80 ° C, oil pressure must be at least 2.0 bar.

If specifications are not obtained:

• Correct mechanical damage, e.g. bearing damage.
• Replace oil filter bracket with pressure relief valve or oil pump.

At higher engine speeds oil pressure must not exceed 7.0 bar

If specification is exceeded:

• Check oil channels.
• If necessary, replace oil filter bracket with pressure relief valve.