Shudder valve seal

[Leon_G]

Is there supposed to be a loop in the rubber seal on the shudder valve. It has been leaking oil from that point.

Also recently the car started juddering and it was the EGR valve that caused it, so it got replaced and now its started juddering again and missfiring, could the loop in the rubber seal on the shudder valve be causing the problems?

[Steve Q]

Welcome to the forum, sorry for the late reply I've only just seen this. I wouldn't normally direct members to another forum but this link on audi-sport.net site might be useful: 

https://www.audi-sport.net/xf/threads/anti-shudder-valve-woes.291209/

Cheers

Steve