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991.2 gts fail- thoughts?

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Old Jan 27, 2019 | 05:14 PM
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Default 991.2 gts fail- thoughts?

Hey all...curious if anyone has experienced this. Driving my manual, 4K mike 991.2 gts, and suddenly the loudest clicking/knocking noise from what felt was the front of the car, but likely from the engine itself. I think it was resonating throughout the car. Extremely loud and people on street were staring so I know it was not normal.

Pulled over immediately, turned off the car out of panic of damaging anything. Turned car back on and noise was gone. I’m likely not driving again until I have time to get it do the dealer.

thoughts on similar experience? It was a continuous loud knock/click which was clearly in line with rpms, so it had to be coming from engine. I hope this is something that can be diagnosed by dealer before major damage.

Thanks all
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Old Jan 27, 2019 | 05:23 PM
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This may sound strange, but have you ever had a stone get caught up in your brake rotors? It can be disconcerting the first time you do. Sometimes all it takes is for no forward momentum to dislodge it. Sometimes a short reverse... Hope it was that and nothing worse. Good luck!

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Old Jan 27, 2019 | 05:32 PM
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Originally Posted by S S
This may sound strange, but have you ever had a stone get caught up in your brake rotors? It can be disconcerting the first time you do. Sometimes all it takes is for no forward momentum to dislodge it. Sometimes a short reverse... Hope it was that and nothing worse. Good luck!

Had this happen to me and it was a stone that eventually dislodged itself
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Old Jan 27, 2019 | 05:47 PM
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I’ve had this happen to me with another car, but it did not sound like a knocking. It was a loud screeching, and slight grind noise. Little bit of back and forth and it cleared up. Hope this is what the OP is experiencing.
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Old Jan 27, 2019 | 06:26 PM
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Originally Posted by S S
This may sound strange, but have you ever had a stone get caught up in your brake rotors? It can be disconcerting the first time you do. Sometimes all it takes is for no forward momentum to dislodge it. Sometimes a short reverse... Hope it was that and nothing worse. Good luck!

Had this happen and sounded very mechanical, varied with speed, and from front of car-- was a stuck pebble. Hopefully that's what you experienced OP.
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Old Jan 27, 2019 | 06:29 PM
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yep pebble or rock - had this happen several times

resolves itself w more driving but damned irritating while it is happening
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Old Jan 27, 2019 | 07:53 PM
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Based on the sound being as loud as you describe I would probably tow to a dealer. When you say it felt like the sound was from the front, did you feel anything in the steering?
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Old Jan 27, 2019 | 08:17 PM
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In order to know if it's the engine or something further down the drive train or something caught in the brakes, you need to push in the clutch and rev the engine.
Does the frequency of the clicking vary with engine revs or with wheel rpm?
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Old Jan 27, 2019 | 08:44 PM
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Another possibility: a #6 machine screw was tossed up through my front passenger wheel wheel - it got lodged in there and would click at whatever speed the cooling fan was spinning rather than matching engine or wheel rpm.
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Old Jan 27, 2019 | 08:51 PM
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Originally Posted by PCA1983
In order to know if it's the engine or something further down the drive train or something caught in the brakes, you need to push in the clutch and rev the engine.
Does the frequency of the clicking vary with engine revs or with wheel rpm?
thanks all for the comments...was able to drive home again--about a 30 min drive, and noise went away. i'm really hoping it was a rock as some of you say, but it def felt more like a screw or rock against a fan (hence the loud clicking and steady rpms)

will update further, but likely heading to dealer just to be 100% safe. thank god for warranties
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Old Jan 27, 2019 | 11:31 PM
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Years ago I lost a wheel weight on my 1987 930 at 140mph...loudest bang-noise from a car I have ever heard and my wife still remembers that over 20 years ago.
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Old Jan 28, 2019 | 12:16 AM
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Drive a bit in reverse. If it doesn’t fix itself. Find a reputable service shop and have them loosen up the gravel in the brake rotors.
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Old Jan 28, 2019 | 11:23 AM
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Noise stopping after powering off and powering on doesn’t likely point to a brake pad stuck object. Could be good to have it looked at. Will likely get the lovely “unable to reproduce” comment but at least there will be documentation that you had that happen. Could be good incase it happens again,
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Old Jan 28, 2019 | 12:00 PM
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+1 for stuck rock.
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Old Jan 31, 2019 | 11:25 PM
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Originally Posted by Jack F
Noise stopping after powering off and powering on doesn’t likely point to a brake pad stuck object. Could be good to have it looked at. Will likely get the lovely “unable to reproduce” comment but at least there will be documentation that you had that happen. Could be good incase it happens again,
Happened again today when i turned on the car... super loud. i found the noise on another post, and i'm trying to stay positive...because most people with this noise end up with a new engine or a massive engine repair :/ On my way to dealer tomorrow

https://rennlist.com/forums/991/966043-engine-clicking-noise.html
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