W211 AMG Discuss the W211 AMG's such as the E55 and the E63

Pressure release?

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Old May 19, 2006 | 03:51 PM
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davidhung78's Avatar
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From: Southern California
2003 E55
Pressure release?

I drove the car pretty hard for about 15 minutes yesterday and when I parked the car and turned the ignition off I heard a 'blow off' type sound from the engine. Made a 'woosh' sound like it was releasing pressure as if I had a BOV or something. But since this was the first and only time I had experienced this I was wondering if I should be concerned or if this was normal?
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Old May 19, 2006 | 04:05 PM
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From: Chicago Land
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Originally Posted by davidhung78
I drove the car pretty hard for about 15 minutes yesterday and when I parked the car and turned the ignition off I heard a 'blow off' type sound from the engine. Made a 'woosh' sound like it was releasing pressure as if I had a BOV or something. But since this was the first and only time I had experienced this I was wondering if I should be concerned or if this was normal?
could be your air suspension releasing some presure.
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Old May 19, 2006 | 04:32 PM
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newton22's Avatar
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BMW E39
Originally Posted by hydeaway
could be your air suspension releasing some presure.
I second that. After parking my car, the car releases a psshhh from the airmatic.
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Old May 19, 2006 | 05:22 PM
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possibilities: airmatic if you have it, just a lot of heat from something, purge solenoid makes some noise sometimes but its usually not THAT loud, thosea re all pretty normal
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Old May 19, 2006 | 08:13 PM
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I'd have to say it's the suspension. Mine does it all the time after I park.
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Old May 19, 2006 | 10:36 PM
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Mine does that too and the Benz tech said that it is NORMAL!
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Old May 20, 2006 | 01:02 PM
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It is normal. The Airmatic lets off the extra pressure that it has built up.
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