turbo actuator

[meganall]

just bought one of these for my a6 so thought i would share it as there quite rare to get hold of on there own so im told
VW AUDI TURBO CHARGE ACTUATOR WASTEGATE FOR GARRETT /gt1749v 2.5 TDI V6 A4 A6 A8 | eBay

[mikey v6012]

hi jst a quik q why would you buy on of these? the reason i ask my turbo had gone a couple of months ago and i had to have it recond.
cheers

[meganall]

b'coz my acuator has gone and is not holding vacuum

[Teflon]

Did a lot of research when I had turbo problems on my fondly missed 2.5 V6 TDI.

The story was that the actuator adjustment threaded rod is supposed to be set up to the turbo on a flow rig so that you get the correct amount of boost (i.e. VNT position for a given engine speed) for a set actuator vacuum level.

There were dark warnings of potential doom from the pundits. It might have been hogwash, but at the very least I'd do a measure and swap rather than just dive in.

[Crasher]

They are hard to set up on the car, the adjustment is very fine and doing it on the car is hit and miss. I take the old one off and set the new one to the same measurement and so far I have had no problems.

[meganall]

the old one had been messed about with so im going to have to find out what the preload should be and set it to that

[PaulF2.5TDi]

I found this VNT TDI turbo: how to adjust actuator & cure boost problems while hunting around various forums for gen on my A4 AFB problems.
The guy explains setting up the length really well