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How to test and replace a VNT turbo actuator VW TDI and VNT actuator adjustment

Time:2012-05-19 14:08Turbochargers information Click:

Turbo diesel VNT Actuator wast

remove the actuator rod fromthe VNT lever. This will let you isolate and test the VNT lever's movement. If it's seized then youhave to remove the turbo and clean the vanes. See 1000q:turbo vane cleaning and 1000q: turbo removalALH / BEW. When the vanes stick too much, do not adjustthe VNT rod. Only adjust the VNT rod if it was out of adjustment before oryou are modifying the turbo or turbo setup. Adjusting it when it doesn'tneed adjusting will not improve turbo response or fuel economy and could causedangerous boost spikes or lack of response. Other non pumpe duse mk4 TDI engines are similar. 2004-2006 mk4pumpe duse 1.9L TDI and 2009+ common rail 2.0L TDI use an actuator with a sensor to see rod position.A common problem with these is broken wiring at the actuator. Carefullyinspect the wiring if you have a 2004+ Jetta/Golf/NB. 2004-2005mk4 Passat TDI use the non-sensor can. VW Touareg and Audi Q7 use an electric actuator for the turbo so the testing and diagnosis is completely different. If you find the tips on this page helpful, the spring should immediately push it back up to the top restingposition. Full travel from the stop is about 1cm and can be seen in theabove videos.

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