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  #1  
Old 06-21-2016, 02:07 AM
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VM Motori Engine Harmonic Noise

I posted this in the export section. Any idea what the referenced pipe does. The noise has reappeared and it could be related to volume flow.

thanks

MY12 Engine Harmonic Noise

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Old 06-21-2016, 03:36 PM
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Re: VM Motori Engine Harmonic Noise

Quote:
Originally Posted by zzkazu View Post
I posted this in the export section. Any idea what the referenced pipe does. The noise has reappeared and it could be related to volume flow.

thanks

MY12 Engine Harmonic Noise
I saw your post over there, but I couldn't see a frame of reference to figure out which pipe you're talking about.

Most pipes under the hood are either air intake or intercooler related.

How many miles on the vehicle? Higher mileage might have filled your intercooler which can have some strange effects.
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Old 06-21-2016, 05:53 PM
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Re: VM Motori Engine Harmonic Noise

I'll provide some more photos/context tonight.

thanks
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Old 06-22-2016, 02:21 AM
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Re: VM Motori Engine Harmonic Noise

Here the locating of the pipe looking front to the vehicle. I have put some foam around the pipe to is if it stops the 'harmonic' from reoccurring as it doesn't begin start after starting.

Strangely the noise is still apparent when the AC Clutch isn't engaged.
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Old 06-25-2016, 03:04 PM
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Re: VM Motori Engine Harmonic Noise

The metal lines are all high pressure. Brakes, A/C, fuel. I don't know what that one is off-hand, but if I were you, I'd trace it to both ends and determine what parts it feeds from/to. Usually, harmonic noises in high pressure lines are one of two things: bad pump or bad valve. If you locate the culprit, sometimes cleaning it can restore it to silence.
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