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Old 11-30-2016, 02:08 PM   #1
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What's this noise?

I get this noise (sounds like a vacuum cleaner) when starting from cold. It goes off after about 20 seconds. No smoke and no cel.
Any ideas?

https://www.youtube.com/watch?v=yCEh3611i_M
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Old 11-30-2016, 02:14 PM   #2
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Your SAI pump is crapping out.
You can take these apart and lube the bearings. They dry out and make noise a while before they die.
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Old 11-30-2016, 02:48 PM   #3
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Depends on how loud it is. Its normal to hear a faint whine.

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Old 11-30-2016, 03:00 PM   #4
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Watching the video, it's abnormally loud. If he's in the U.K., is there even an SAI?
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Old 11-30-2016, 03:01 PM   #5
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That's definitely bad/dry bushing on the secondary air pump. Easy fix and cheap if you take it apart and grease them before they burn up the motor.
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Old 11-30-2016, 03:14 PM   #6
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Thanks for the quick replies.
I guess I have a project for tomorrow! It looks fairly easy to remove!
Are there any write-ups for this and what type of grease is required?
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Old 11-30-2016, 04:09 PM   #7
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Many VAG products use the same SAI pump. Here's a DIY I found where an Audi owner gutted his and nursed it back to life.

WRITEUP: 2.7T Secondary Air Injection SAI Pump rebuild - AudiWorld Forums

Or check with Woody... he may be able to fix you up with a decent used one.
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