Oil pressure test VR6
On the VR6 engine, it is hampered by the fact that an oil bypass valve is installed in the upper part of the filter housing, which must ensure a continuous supply of oil to the system if, for example, the oil filter element is clogged. You can see the bypass valve only by removing the filter housing. When replacing the filter element, you must thoroughly wash the inside surface of the filter housing (see fig. 179) The VR6 engine , like the 2.0 engine, is equipped with two oil pressure sensors - the second of which is paired with a buzzer. If the oil pressure drops below 0.3 bar, then this sensor turns on, the oil pressure control lamp lights up. If the oil pressure drops below 1.8 bar, and the speed exceeds 2150 rpm for more than 1 second, then the contacts of the 1.8 bar oil pressure sensor open. The oil pressure warning light comes on and a warning horn sounds. For verification, it is recommended to proceed as follows.
Rice.
179 Filter cover Oil bypass valve located on the left
♦ Check the oil level, top up if necessary.
♦ Switch on the ignition.
The oil pressure indicator light should come on. ♦ Start the engine.
The oil pressure indicator light should go out. If it doesn't, check the oil pressure. ♦ Remove the wire from the 0.3 bar oil pressure switch (sensor with bluish-black insulation) and short the end of the wire to ground.
The oil pressure indicator light should come on. ♦ Plug the connector back in place.
♦ Remove the 1.8 bar oil pressure sensor connector (sensor with yellow insulation).
♦ Start the engine, keep it running at 2500 rpm. more than 1 sec. The oil pressure warning light should come on and the warning horn should sound. This simple check ensures that the oil pressure sensors are working.
Volkswagen T4 engine . Transporter T4 technical specifications .