Engine Oil Pressure, Checking

Special tools and workshop equipment required 

• Oil Pressure Gauge Kit: VAG1342 
  Fig 1: Identifying Oil Pressure Gauge Kit

  Courtesy of AUDI OF AMERICA, LLC
• Socket and Jointed Extension - 24mm: T40175 
  Fig 2: Identifying 24 MM Socket And Jointed Extension

  Courtesy of AUDI OF AMERICA, LLC

• The oil pump is regulated and has two pressure stages. The pressure stages are checked one after the other.
• During the break-in phase or in engine emergency running mode the oil pump only pumps in the higher pressure stage.
• The oil pressure depends on the engine oil temperature. At an engine oil temperature of 80 °C (176 °F) approximately the average must be reached.

Test Requirements

• Oil level OK
• The engine oil temperature at least 80 °C (176 °F) (the radiator fan must start up once).

Test Sequence

Courtesy of AUDI OF AMERICA, LLC

-- Place a cloth under the sub-assembly bracket to catch any escaping engine oil.

-- Disconnect the connector -2-.

-- Remove the Reduced Oil Pressure Switch -F378- -1-.

-- Install the Oil Pressure Gauge Kit: VAG1342  into the oil filter bracket in place of the oil pressure switch.

-- Install the Reduced Oil Pressure Switch -F378- in the Oil Pressure Gauge Kit: VAG1342  and connect the connector.

-- Start the engine.

• Oil pressure at idle speed: 0.85 to 1.6 bar (12.33 to 23.21 psi).
• Oil pressure at 2000 RPM: 1.2 to 1.6 bar (17.4 to 23.21 psi).
• Oil pressure at 3, 700 RPM: 3.0 to 4.0 bar (43.51 to 58.02 psi) -2. Pressure stage active, the Oil Pressure Regulation Valve -N428- is OK.

-- Turn off the engine.

Assembling 

-- Install the oil pressure switch (refer to Reduced Oil Pressure Switch -F378-, REMOVING AND INSTALLING ) and carefully route the wire.