It's better to know that it made then noise in their prescence. That's always been my issue with stuff like this.

Hope it gets fixed.

 

i know lol i brought my car into the dealership about 2 weeks ago for the same thing. well they replaced a couple of sensors but the sound was still there. so i called them last week and told the service writer that they need to keep the car over night to hear the sound that im talking about,so i didnt sound like i was crazy lol

 

I'm sure my car has this sound 2010 SS. I have. K&N sri and Injen charge pipes. What will happen if I don't get this fixed for a while?

 

My 09 SS/TC did this once after I stored it for the winter for about 6 months. It was a loud and noisy grinding sound, like metal on metal. I chalked it up to lack of lubrication in the valvetrain, so what I do now is crank the engine and shut it off right before it starts up. Then I repeat this once more. I figure it wouldn't hurt to get some oil pumping through the system for a few seconds before I let the engine fire up and idle.

 

LOL I gave up on the dealerships, Horrors in the making. I got a bran new motor, just hit 10k on it. Have an 06 SS SC. An its been doing this ticking ever since it has hit Mile 0000001 lol. I just assumed it was a cobalt thing. I REFUSE!!!! To let any GM dealership to touch my car again. Every time I got it back something else was broke on it, and they wouldnt cover it. Scratches, broke my spring on my strut. All of a sudden broken sun roof on the next trip, and they just slapped the broken part in the front dip area.

Good luck to you man. I hope you figure it out

 

My car has done this for 2.5 years, if you're talking about the noise at cold startup that sounds like a serpentine belt tensioner with a bad bearing. Terminator2 and BYT both know what it is. I can't remember what they said, but it's part of the cat warmup. My buddy has Trifecta with no cat warmup and his car does not make the noise.

Of course, you guys could be talking about a different noise, altogether.

 

yea,must be talking about something else. my cars at the dealer right now getting it fixed. cause by a broken timing chain guide along with a bad timing chain seal. im getting everything replaced.

 

Ill take a vid of it. Just becoming more and more noticeable lately. High fast pitch ticking at start up. then goes away, maybe 20 seconds later repeat. Then quiet... if I rev it it will do it again, then MAYBE some grinding noise. Its going to be going to the shop this week "Hopefully". If they get me a rental. The motor is all warrantied. It only has 10k on a brand new motor.

 

Look here https://www.cobaltss.net/forums/2-0l...r-hood-270199/

And here https://www.cobaltss.net/forums/08-1...-sound-269680/

I posted my findings and my expreirnece with this issue.

 

This "ratcheting" noise at cold start up (when it's really cold outside) has been answered long ago by a GM engineer (Bill if I remember correctly) and it is the cam phasers. He went on to say that it does NOT hurt the car and it's basically the phasers running dry for a few secs and once they get oil it stops. I run 0w-30 for the winter and that noise has never come back after 2 winters.

 

Thanks, never thought about using 0w30 in winter. Great idea.

 

lol when the hell was GM going to send a bulliten out to the dealerships!! lol o well,i just got a bunch of free parts put on my car and didnt fix the problem but the noise has gone away quite a bit.


i run 0w40 in my 4 wheeler. i always forget what the numbers for oil weight mean. the 0 stand for weight right?

 

The numbers refer to cold weight and hot weight respectively. Oil works counter-intuitively and actually thickens as it gets hot.

 

I was getting some sound from my motor still on start-up, said **** it an bought lucas synthetic oil stabilizer, threw the whole quart in. Motor be all sorts of silent now. You could probably hear an ant fart.

 

^ this.... our 2011 Equinox used to do it. Took it in several times before they figured out it was the actuators. It would do it when warm as well. They replaced the the cam phase actuators and it seems to have fixed the problem.

 

Nice, glad to hear that. I am going ahead and tearing her down one more time just for good measure and replacing all the major timing components. Chain, Actuators, actuator solenoids and all the bolts. I Dont want this to happen to me again lol

 

im pretty sure thats what is wrong with mine. it has been making that sound since 42k miles and im at 45k miles...

 

We should meet up and replace all these ***** and take them to the dealer at once