12' WRX. Boost Leak? Turbo Bearings? #7 Bolt? HELP!! - Subaru WRX Forum
 
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#1 Old 06-15-2012, 09:00 PM
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12' WRX. Boost Leak? Turbo Bearings? #7 Bolt? HELP!!

I have a bone stock 2012 WRX. 12k miles. No issues to date. The problem i'm experiencing is a whistling sound when my turbo kicks up around 3500 to 4000 RPM. Its a pretty noticeable sound. 2 thoughts come to mind. Leaking air (boost leak) or bad turbo bearing? My oil level is perfect and i've changed it ever 4k.

Here is the interesting part that might be a MAJOR clue. When I changed the oil at 4k, there was a bolt sitting in my plastic under guard. It is a bolt with a #7 on it. Similar to those which I can see on intake parts and other plastic parts under the hood. I am guessing the 7 refers to a torque spec? Is there a complete listing of where #7 bolts appear? It looks to be a 30mm long M8.

What im hoping happened is that the bolt being out finally cause the high pressure air to leak thru.... but I was hoping someone has information on the locations of these bolts so it can be the first attempt at resolving the issue.

THANKS!
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#2 Old 06-15-2012, 10:29 PM
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pzr2874 is known to be trustworthy and helpful pzr2874 is known to be trustworthy and helpful
You under warranty?

Paul
2007 XT
2007 MS3
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#3 Old 06-16-2012, 09:54 AM
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If its bone stock it has to be under warranty




Aspired newb Subaru enthusiast
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#4 Old 06-16-2012, 10:47 AM
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pzr2874 is known to be trustworthy and helpful pzr2874 is known to be trustworthy and helpful
#7 is the grade of the bolt. Nothing to do with TQ

Take it into the dealer to have them look. That would freak me out... hahaha

Paul
2007 XT
2007 MS3
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#5 Old 06-18-2012, 05:45 AM
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Hopefully taking it in today. I'll update with any news. Thanks.
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#6 Old 07-30-2012, 02:28 PM
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Took it in... Service managers says waste gate. Why did the waste gate make 0 noise the first 12k miles? Still driving it. I'm gonna find a local guru to diagnose; then taking it to another dealer. I wish I had the time to sort this out :-/
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#7 Old 07-30-2012, 08:23 PM
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Turbo to downpipe bolt?

That would squeal thru the gasket under power....
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