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Old 12-09-2018, 04:09 PM
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GBX
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Default Name that Noise
Is this high pitch whine/whistle normal throughout the Rpm range? It gets loudest Closest to redline. Is it the varioram or a vacuum leak?? Any thoughts would be appreciated!! Thanks!
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Old 12-09-2018, 09:00 PM
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One of my previous 993s made the same noise. Gave it the good old Italian tune up the noise went away. Seriously though, check your belts, bearings, tensions etc..
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Old 12-10-2018, 12:51 PM
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Is that an OEM intake?
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Old 12-10-2018, 01:16 PM
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Somebody snuck a turbo onto your car! But as previously mentioned, check the belt tensions and fan/alternator bearings.

I had a similar - though not exact - sound which turned out to be a fan bearing going bad.
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Old 12-10-2018, 03:14 PM
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TMc993
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In addition to the other suggestions, it could be the wheel on the fan belt sensor going bad. Temporarily zip-tie the arm back so the wheel is not in contact with the belt and see if the sound goes away.
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Old 12-10-2018, 06:16 PM
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Originally Posted by TMc993
In addition to the other suggestions, it could be the wheel on the fan belt sensor going bad. Temporarily zip-tie the arm back so the wheel is not in contact with the belt and see if the sound goes away.
Just changed the sensor

Originally Posted by SpeedyC2
Somebody snuck a turbo onto your car! But as previously mentioned, check the belt tensions and fan/alternator bearings.

I had a similar - though not exact - sound which turned out to be a fan bearing going bad.
Supercharger is more list it. Crazy, right? Will check the bearing but the fan is fairly new. Would they change the bearing when replacing the fan?

Originally Posted by nile13
Is that an OEM intake?
Yeah! Motor sound but its OEM w/ OEM filter

Originally Posted by P-daddy
One of my previous 993s made the same noise. Gave it the good old Italian tune up the noise went away. Seriously though, check your belts, bearings, tensions etc..
It does kind of sound Ferrari
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Old 12-10-2018, 09:21 PM
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Any chance it's electronic coming through the speakers? Can you hear it outside the car?
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Old 12-10-2018, 10:37 PM
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Originally Posted by swmic
Any chance it's electronic coming through the speakers? Can you hear it outside the car?
Its loudest at WOT so I’d be suprised if it’s electrical. I’ll pay close attention to the speakers next time. Thanks.
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Old 12-11-2018, 01:49 AM
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I would try a non-Motorsound intake cover for comparison This very much sounds like an intake whistle to me. Which might be the Motorsound cover or an intake leak somewhere.
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Old 12-11-2018, 07:58 PM
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Greg Bell
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Steering pump cavitation - is there an air leak somewhere?
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Old 12-11-2018, 08:31 PM
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Originally Posted by Greg Bell
Steering pump cavitation - is there an air leak somewhere?
not quiet sure what that is. Can you explain? Also, would this get louder with acceleration?
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Old 12-11-2018, 09:51 PM
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I severely doubt it's cavitation. The pump is not really working in a straight line run, nor would the noise be acceleration related.

I thought of something _really_ simple. Take some duct tape and tape over the small holes on the motorsound cover, See if the noise changes or goes away. To me it just sounds so much like the intake whistle. Additionally, see if your clutch coolant tube is properly connected to the aforementioned cover.
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Old 12-11-2018, 10:48 PM
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Greg Bell
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Steering pump cavitation is when an air leak is introduced to the steering pump circuit causing air to be sucked in. I had the issue on a different car, the steering was not affected, just made a terrible noise. Had a rat living somewhere under the car and one day when I started the car the rat moved and got caught in the belt at the front of the engine damaging the belt. The rat didn't make it. The mechanic who replaced the belt moved some steering pump hoses to fix the belt and introduced the air leak.
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Old 12-13-2018, 07:12 AM
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Originally Posted by nile13
Additionally, see if your clutch coolant tube is properly connected to the aforementioned cover.
Tube is connected. Will try some tape when I have more time. Thank guys!


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Old 12-13-2018, 12:20 PM
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Blessed, deaf or both, the combination of my hearing aids and the marginal sound quality on my laptop seems to have corrected the issue with your car, but that's just for me.
Good thing to know my car will never exhibit this issue.
Andy
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