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Discussion Starter #1
Hi, so I got my 2017 Volt last month, and I recently took it for my first long trip, requiring frequent ICE useage. I noticed that every time the ICE kicks on at low speeds (20-30mph, while accelerating) there is a relatively loud clank noise coming from the rear...maybe rear passenger side. To me it sounds like the muffler is jumping around back there and hitting things (sounds like someone hits the muffler with a hammer when the ICE turns on). I googled a bit, and I see quirkySquirt has some stuff in their signature that might be relevant, but I haven't made enough posts to see his signature so I apparently can't look at it.

Anyways, is this something I should be worried about? Any way to fix it?
 

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Seems to be a common problem with the Gen 2. I don't think it's anything serious but it definitely shouldn't be there. Someone here (maybe the person you referenced) has a lot of info on it in their signature including a mention that GM is looking into the cause.
 

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D'oh! Never realized you needed sufficient post count to see the info in my signature. Thought you just needed an account. Here it is copy-pasted:

2017 Kinetic Blue Volt, VIN #11955, built June 2016.
If your Volt makes *BANG* sounds like this or this or even this, then checkout the following threads:
[email protected] #44: Backfire - http://gm-volt.com/forum/showthread.php?261057-16-Volt-backfiring&p=4231225#post4231225
Bang Click Noise - http://gm-volt.com/forum/showthread.php?252514
Clank on Right Turn - http://gm-volt.com/forum/showthread.php?227073
Sporadic Clank - http://gm-volt.com/forum/showthread.php?282465
 

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VIN 15399 built June 2016 and no odd noises. This is one of those weird noises dealers hate to deal with. Good luck in your search for an answer and solution.
 

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Hmmm, ICE only, right rear. Try gas filler pipe/tank related. My ex-Gen 1 used to make an occasional loud bang on long trips which I concluded was related to the gas level dropping in the tank and pressure relieving with a bang. Perhaps something similar is happening in the Gen 2. If the car/engine will start with a loosened gas cap, try that and see what happens.
 

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Discussion Starter #6
Hrm, well I watched those videos, and I definitely get that sound. I guess the consensus is it's an afterfire?

I was mostly worried about is causing damage in the long run, hopefully nothing breaks from that noise. I don't think I drive on the ICE for it to actually bother me enough to do anything about it.
 
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