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Question. Engine hissiing after off.

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Old 07-09-2018, 09:58 AM
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C63AMG Coupe 507, GL X166
Exclamation Help. Noise after turn off the car?
Guys tell me what that hisses? I think the sound is from the intake manifold. Sound like air.
What is that noise. After turn off the car?

Last edited by Alex-r-1; 07-10-2018 at 04:38 AM. Reason: Title
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Old 07-09-2018, 10:54 PM
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2012 c63 AMG, 2011 GLK 350, 2019 GLS 450
I don’t hear anything
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Old 07-09-2018, 10:59 PM
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C63 AMG, P30
4 second mark
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Old 07-10-2018, 04:31 AM
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C63AMG Coupe 507, GL X166
New video added.

Last edited by Alex-r-1; 07-10-2018 at 04:38 AM.
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Old 07-11-2018, 12:07 AM
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Sounds like your car is cracking a cold one after a long days work.
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Old 07-11-2018, 12:43 AM
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Originally Posted by ShaneN.
Sounds like your car is cracking a cold one after a long days work.
But that's a good sound.
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Old 07-11-2018, 12:24 PM
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Check the PCV hose at the back of the intake manifold. Or spray carb cleaner on the intake manifold gasket while car is idling and see if rpm changes
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Old 07-12-2018, 05:25 AM
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I replaced the PCV valve and the intake manifold gasket. The sound did not disappear. It also sizzles in the intake manifold!(
Last edited by Alex-r-1; 07-27-2018 at 05:43 AM.
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