I own a 2006 manual HHR LT that two weeks ago starting giving a chirping or clicking sound from under the hood .. no-one can pinpoint exactly what it is.
Sound is only heard at idle or 1500 RPM or less, as the engine speeds up sound is drowned out, or goes away. Sound is coming from the right side of the block, not the left side belts, and some days/times is non-existant and sometimes very loud, like at stop signals.

Any thoughts?? Already had the S-blet changed and it sounds like it's coming from elsewhere.

 

Bird?

 

sounds just like a bird, i've looked all over the forum and can't find anything on this.

 

I had a similar issue on my previous 2.2 LT. They first changed the belt. Then they replaced the belt tensioner. After that, they found a loose bolt on the harmonic balancer. Finally, they changed the belt a second time and all was good.

 

I have the same sound on my 2006 2.2 auto. It happens upon acceleration and is a faint sound that goes up in tone and lasts only 2-4 seconds. I have no clue what it is and have never had it looked at.

 

Based on past experience on multiple vehicles, it is usually: the idler pulley, tensioner pulley, or (most expensive) the alternator.

 

Thank you everyone for your feedback.
What has me stumped is it will only happen when the car has been driven over 90km prior to that the chirping is not noticeable.

If i'm traveling at high speeds if i put the car into neturl once the rpm hit below 1500 you can here it. Put the car back in gear and away goes the noise.

come to a complete stop and the chipping goes away after a few seconds.

 

So any news on what it could be? I just acquired a 2007HHR 2.2l and has the mysterious "chirping noise" at idle

 

Welcome
If you're looking for an answer from the thread starter, I doubt you'll get one. This thread died 12 years ago !

Now if you're trying to find a mysterious "chirping noise" from the same location as the OP, then check for a broken air filter housing bracket.

 

Thanks FMG, for adding an additional source of the dreaded chirp.