Ive heard it before but only happens every once ina while ... i was driving today then stoped and it started ticking in and out then started it back up and didnt do it anymore. Then a little while later i was driving for a bit then stoped and it started doing it again. Any idea what it might be? I want to bring it to the dealer but if its not making it when i do then theres no point.

 

Are you positive its coming from the enigine? Cuz we all know cobalts come with a troll in the trunk. Is it a ticking or more of a knocking?

 

Nah its deff coming from the engine .. more of a ticking ..

 

Check your oil... is it still thick or is it like water and runny.

 

I have had a ticking sound ever since my first oil change. It is a lifter sound. I have taken it back to the dealer three times for this sound and they tell me that it is normal. Not normal on any engine that I know of. I know solid lifters do make a little noise. The oil level is fine. It been there two year now.

 

Yea its deff not normal lol it only happens every once ina while tho im thinking timing chain not sure tho .. oil should be good just had it changed 2000kms ago

 

I've got something that sounds much the same, only noticed it after i took off the engine cover and installed an Injen CAI. Possibly the throttle body?

 

Yeah I want to get rid of it it sounds like a diesel when its ticking lol can ya upload videos or sounds onto this site?

 

I would bet the timing chain tensioner is giving up.

 

I guess if i brang it to the dealer and it wasn't making the noise there wouldnt be much they could do right?

 

QFT! good luck at the dealership...mine tells me im crazy so mine is going to my actual mechanic to have it done right

 

you dont have an lnf (ss/tc) do you? if so its the direct injection

 

I know that my injectors make a lot of noise on start up in my 2.2 when you rev it does it go away?

 

thats what i was thinkin as well

 

i checked his profile...he has an 07 ss/sc...it seems the timing chain tensioner bolt is a problem with some early 07's (including mine) and i believe 06 models.

 

Yea i have an s/c ... when I just got home before and let it idle for a min it did it for about 30 seconds then went away ... i never hear it while im driving or rev it up though

 

my car makes a noise that sounds like marbles in a coffee can (kind of) sometimes when idleing but its not very loud...i just assume its the supercharger and forget it lol

 

Nah this sound is loud as hell sounds like a pos when it does it lol so if it was the timing chain why would it only do it at idle?

 

Mine kind of did this, and they replaced my supercharger and it was fine for a little while, now 7k miles later (26k total) its doing it again. But I'm almost sure my ticking was from the charger

 

At idle there is more slack in the chain than under load or at higher rpm. The tensioner is fed by oil and oil pressure is it's lowest at idle aswell.

 

I don't know about the OP's exact problem, but on my 2.2L, and everyone else I know with one, the injectors tick loud as *****.

 

"it sounds like a diesel"

that's exactly what mine sounded like. it's the timing chain tensioner.

i always heard it at idle on a hot restart--that is, drive, shut car off for 20 mins, then drive again.

 

Yea mine only does it when its hot to .. did you end up getting it fixed?

 

yup. i fixed it myself. the part is about $60 on CED. you need to take the valve cover off and get a 32 mm socket to get the old tensioner off and install the new one. you install the tensioner in its compressed state and release it by striking the tensioner guide from up top. that's why you have to take the valve cover off.

don't listen to people who say you don't have to take the cover off and just start it up and let oil pressure release the new tensioner, unless you want to risk the chain jumping while it's slack. it doesn't take long to take the valve cover off.

 

Yeah i still have warranty so I might bring it to the dealer but I dont think they'll just do it unless its making the noise .. can this cause any damage if I don't get it fixed?