[02 Beetle TDI Victim]

Hi All: My name says it all. Our TDi has just turned 100k mi. Need new vnt actuator. Just trying to view the post I saw on the web.

Thanks!

 

[chittychittybangbang]

Welcome!welcometomyturbodies

Make sure you confirm that the VNT actuator is bad before you replace it.

 

[Superbass]

It looks like there are a lot of these failing. What is it about the actautor that causes them to fail? Rust?

 

[Seatman]

Does anybody think this is a condensation issue or just a faulty batch of steel?
And is it just on the vnt turbos or has anybody had this happen on a wastegate turbo?

I'm just curious as me and friends of mine have had older vag engined cars for a while and I've never come accross this issue.

 

[8Hector8]

Maybe the VNT moves more than a wastegate? A wastegate flutters open once the requested psi is reached and just has to open a small door. The TDI has a smaller turbos so the "wastegate" opens relatively early compared to more racy top end power gas engines. Maybe the VNT puts more wear and tear on the vacuum diaphragm.