Quick diagnostic test of crankcase pressure, exhaust back pressure and pneumatic boost pressure control possible without an OBD tester.
Measurement of crankcase pressure
The Leitenberger car test equipment diagnostic tool for turbochargers and crankcase pressure measurement of exhaust back pressure offers you the opportunity to easily measure the crankcase pressure. Above all, increasing requirements and increasingly complex vehicle technology make it essential to check the pressures while driving. Our diagnostic tool is able to measure pressure in both the negative and positive ranges with an accuracy of one millibar. Thanks to the included adapter for the oil filler neck, pressure measurement can be carried out in almost all cars. Special additional adapters can easily be reordered.
Problems with crankcase pressure often manifest themselves as oil loss from the turbocharger. The increased pressure causes resistance in the turbocharger's oil drain line, meaning that the oil can no longer drain freely back into the oil pan. The oil is then pressed through the turbocharger into the exhaust system or intake line, even if the seal is intact. Clogged filter elements can cause oil mist to reach the intake in front of the turbocharger via the crankcase ventilation exhaust hose.
Measurement of exhaust back pressure
You can also use the turbocharger diagnostic tool to measure the exhaust back pressure while driving. This measurement is very important because you often cannot rely on the values read out in the engine control unit. Due to the design, the differential pressure sensor can show you a value that is too low, which is unfortunately not correct. This is precisely why it is very important to determine the actual pressure again with a special measurement.
Excessive exhaust back pressure can cause damage or even failure of the turbocharger. Due to the excessive exhaust back pressure, the temperatures in the turbocharger rise, which puts enormous strain on the material of the charger. In addition, the risk of coking oil and an oil fire in storage is increased. Furthermore, an axial thrust occurs on the turbine shaft, which results in increased wear on the axial bearing in the turbocharger, leading to bearing damage or total failure of the turbocharger. Oil leakage can also occur on the compressor side due to the unequal pressure conditions. The result is unclean combustion and an engine that produces a lot of soot.
Testing the pneumatic boost pressure control
With the turbocharger diagnostic tool you can not only measure the crankcase and exhaust back pressure, but also check the function of the pneumatic boost pressure control. The hose is removed from the turbocharger's control socket and the pressure gauge is inserted into the system using the T-piece supplied. The control pressure of the control box and the function of the vacuum pump or solenoid valve can then be checked. This control is also possible while driving.