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Om642 w639 excessive boost leak(sorted)

Iskapsts

Member
Joined
Jun 20, 2020
Messages
55
Location
Bedford uk
Car
2008 viano lwb 3.0cdi
Hi guys, I had large boost leak for few months have checked all pipes, seals, no luck. Today made diy boost tester and immediately spot problem, see picture- I have no idea what meant to be connected there apart of swirl flap motor fitting( sf motor is removed as it was jammed and links completely broken) I have put nut back in there and problem sorted, but still unaware was this hole meant for swirl flap motor or what it’s for. There was just a hole with thread blowing all boost right out of it.

Many thanks.
 

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