cbons

this as? Have what sounds like a very tiny jet engine (like a fan whir) that comes on about the first 30 seconds on cold startup, then abruptly shuts off. Doesn't sound as loud as others have described it to be, but I'm guessing it's the SAI everyone refers to. Correct or no?

grey-2002-ar-6sp

Yes.

SKIroad'r

2nd

paulroad

It is exactly what the name says. It an AIr Injection pump...electic fan..really a mini turbine.

4Ring Jelly

my AR has this too, it sounds like a helicopter/jet engine. its not bad, is it?

Trango

....so I've been inside these things. Extensively, I'll say.

I talked to an expert, and typically, from what he says, the bearings tend to go. There are other things, but it sounds like typical wear concerns on bearings. Generally, oiling ameliorates the issue of bearing wear.

What about proactively oiling these bearings?

SKIroad'r

basically think of it like a choke on an older car or piece of power equipmwnt. It helps warm up the engine/cats to standard operating temps.

cbons

=)...thanks brain trust. Figured it was that.

cbons

<a href="http://forums.vwvortex.com/zerothread?id=3751790">Different engine</a>, but then <a href="https://forums.audiworld.com/vag/msgs/15965.phtml">this post</a> referenced it.