Knock/bang during charging?

[Chrisgillett]

Tried the search but kept finding crashes…

Had my 3 for about 18m/20k miles now (nov19 facelift). Most times I use the supercharger I notice after a few minutes a fairly loud knock/clunk coming from under the car, also feel the vibration in my feet. Only happens once per time and doesn’t appear to be an issue… but anyone else get this??
Guess my main question is should I continue to ignore as ‘TADTS’ or do I have an issue?
Thanks

 

[WannabeOwner]

Most times I use the supercharger I notice after a few minutes a fairly loud knock/clunk

There's some expansion which causes that, so its normal. Unless you have something else though!!

 

[interbear]

Tried the search but kept finding crashes…

Had my 3 for about 18m/20k miles now (nov19 facelift). Most times I use the supercharger I notice after a few minutes a fairly loud knock/clunk coming from under the car, also feel the vibration in my feet. Only happens once per time and doesn’t appear to be an issue… but anyone else get this??
Guess my main question is should I continue to ignore as ‘TADTS’ or do I have an issue?
Thanks

I had a bit of a fright the first few times I used a supercharger. Pops and bangs galore. "WTF is that", thought I, "that can not be right."

A bit of web research reassured me that this is totally normal, something to do with the battery cells expanding during rapid charging. Nothing to worry about.

 

[GRiLLA]

Trying staying inside the car during a software update, it sounds like the firmware updates itself with a hammer.

 

[Adopado]

Tried the search but kept finding crashes…

Had my 3 for about 18m/20k miles now (nov19 facelift). Most times I use the supercharger I notice after a few minutes a fairly loud knock/clunk coming from under the car, also feel the vibration in my feet. Only happens once per time and doesn’t appear to be an issue… but anyone else get this??
Guess my main question is should I continue to ignore as ‘TADTS’ or do I have an issue?
Thanks

Mine occasionally has an "elevation clonk" ... I call it that because it's like your ears popping when driving up or down a significant hill ... it did it quite consistently in the early days but a software update altered the action of some kind of pressure releasing valve according to the release notes at the time. These expansion type noises never seem to be an indication of anything worrying AFAIK.

 

[Irata]

Yep, supercharging quite often is accompanied by at least one clonk, usually more.

 

[Tony Hoyle]

You'll get steam too in the right conditions, which new users sometimes think is smoke

 

[AlexMasters]

I understand it is the battery case expanding when heating under charge .. a bit alarming but normal.

 

[browellm]

You'll get steam too in the right conditions, which new users sometimes think is smoke

I'll not lie, I almost sh*t myself the first time this happened

 

[Chrisgillett]

Alright. Consensus is in - ‘normal stop worrying’. Thanks team

 

[Louis0w]

This made me remember a video Bjorn posted a few years ago:

 

[Chrisgillett]

This made me remember a video Bjorn posted a few years ago:

It’s exactly that. Great find!

 

[Irata]

I always imagine it's someone having a comedy fight with a frying pan.

 

[Overworked]

You'll get steam too in the right conditions, which new users sometimes think is smoke

I think that gets fixed with a “soft recall” as some pipes get insulated when you get any other work done. It is then considerably reduced. Fortunately I was aware of it the first time and knew the car was not on fire!