Checking oil pressure and oil pressure switch

Special tools and workshop equipment required

• Oil pressure tester - V.A.G 1342-
• Voltage tester - V.A.G 1527 B-
• Adapter set - V.A.G 1594 C-

3.3.1 Checking oil pressure switch

Test conditions

• Oil level OK, checking ⇒ 1.3 Removing and installing sump
• Engine oil temperature at least 80 °C (radiator fan must have run once)

• Remove oil pressure switch - F1- ⇒ Item 17 (page 67) »green insulation« and screw into tester.
• Screw tester into cylinder head in place of oil pressure switch.
• Connect brown wire of tester to earth (-).
• Connect voltage tester -V.A.G 1527 B- using auxiliary cables from -V.A.G 1594 C- to battery positive (+) and oil pressure switch. LED must not light up.
• Start engine and increase revolutions slowly. At 0.3…0.6 bar, the LED must light up, otherwise the oil pressure switch must be renewed.

3.3.2 Checking oil pressure

Special tools and workshop equipment required

• Oil pressure tester - V.A.G 1342-

Procedure

• Oil level OK.
• Engine oil temperature approx. 80 °C.

• Remove oil pressure switch - F1- ⇒ 3.3.2 Checking oil pressure.
• Connect oil pressure tester - V.A.G 1342- to hole for oil pressure switch - F1-.
• Screw an old oil pressure switch into hole on oil pressure tester - V.A.G 1342- to seal hole.
• Start engine.

• Minimum oil pressure at idling speed: 0.8 bar.
• Increase engine speed further. At 2000 rpm and an oil temperature of 80°C, the oil pressure should be at least 1.5 bar.

At higher engine speeds, the oil pressure must not exceed 5.0 bar. If oil pressure exceeds 5.0 bar:

• Renew oil pump ⇒ 5.1 Assembly overview - balancer shaft module.