High Pitched Whistling Noise from 2007 Volkswagen Passat 2.0T

5

Asked by sawezi Sep 30, 2012 at 10:11 AM about the 2007 Volkswagen Passat 2.0T

Question type: Maintenance & Repair

Hello people!!! I have a 2007 Volkswagen Passat 2.0 T and couple of weeks now, I've been experiencing this very
loud high pitched whistling noise from the engine!  Comes on in the morning after driving about 5/10mile. It stops
when I accelerate and starts when I take my foot off the accelerator pedal. I have been to a mechanic who says it's
the TURBO! However a friend of mine who has same car for over a year discussed with the mechanic who says it's
VACUUM.  Now am really confused! Let have owned this car for barely three months and this is the first issue I'm
having with. Anybody!! Please assist

8 Answers

4,615

both answers could be right,odds on that it is the vacum as when the engine gets hot /up to temp it is sealing the hose so i would look at that first with the posibility of replacing the vacum hoses and posability of the egr valve as well if it is fitted to your model some did some didnt it depends on where in the world it was assembled

4 people found this helpful.
135

You can check the A/C and power steering belts. They nay be due for tensioning.

6 people found this helpful.
130

So I had the same issue. However, when I accelerated it did not make the sound but when I take my foot off of the gas it does. My sound it deafening though. The issue is the valve has broken. The valve also known as PCV, Crankcase, Oil seperator valve.

13 people found this helpful.
50

It's the pcv valve located under the engine cover. It's actually attached to the engine cover. There is a cheap fix where you can buy just a portion of the part. Trust me. Just buy the whole part.

2 people found this helpful.
10

My daughter's '06 Passat (3.6l 4motion turbo) is doing the same thing. We've replaced the pcv valve though and it's still doing it.

1 people found this helpful.
50

Rebecca. Did you go the cheaper route and buy the partial part? I've read that doesn't work sometimes.

10

We bought the whole part, the previous owner had used a small piece of hose to repair it at some point.

50

Rebecca. I'm still convinced it's the PCV. It wouldn't be the first time a new part was broken or defective. Check out this video for testing. https://youtu.be/3uXfqRk6kok

3 people found this helpful.

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