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Discussion Starter #1
2008 Chevy Coblat LS

Hi,
my Cobalt has a clicking sound after the start.
The car starts without problems, drives without problems....etc. Nothing special only a short time after the start (1 or 2 seconds) it makes around 8 (haven't count it) clicks.
The oil level was low but that is fixed now.
What could it be?
Thanks.
 

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Timing chain tensionner if it's the original. If it was run too long on low oil levels, the chain may have stretched. If it has the revised version of tensionner then a timing chain replacement may be in the near future. If it has the tensionner without the bump then maybe just replacing the tensionner with the revised version will be enough to keep her going for a while yet.

 

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From your concern about the oil level, I assume the noise is in the engine area. If so, nothing to add. But, if it's in the cabin, our '07 has a short-term 'clicking' (more 'clacking'; but, whatever) from under the RH dash after the car is started. I believe the air controller is banging one of the vent doors.
 

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That noise is the fresh air door flapping because the end switch has failed. Very common on the Cobalt. I just disconnected that circuit on my 2010 Cobalt for 2 reasons, I never used that button anyway and secondly you have to disassemble the whole dash to get to that motor. I simply pulled the pin out of the connector behind the HVAC module and that was that.

Quick search and I found an old post.

When mine started doing the clicking in my 2010 and I realized I had never used that button in 4 years of having the car I just pulled the wire out of the connector behind the HVAC control panel. It stopped the annoying noise and didn't make a difference to the way I used the HVAC. Didn't cut the wire in case I decided to repair it eventually, but like 1966tbird said it's a good days job if you're alone and very small hands is a plus.



 

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Discussion Starter #6
Thanks a lot for your help Coby7!!
Sorry but which is 'that button'? If I would switch of 'that button' than the clicking should stop (it only happens when I start the car)?
And, please, if I wouldn't fix it now, e.g. would not pull the wire out (I have big hands), what could happen? Does it have any consequences?
Thanks for your help and time!!
 

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No consequence, just annoying as hell. It's the recirculate button on the bottom right, but it resets itself every time you turn off the engine so it's still going to do the noise no matter what.
 
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