[MAGAUSA]

Are you all seriously spraying lubricant on your pulleys?

[2016SS]

Originally Posted by MAGAUSA

OMG, This is not a Nissan forum.

I notice this as well. It has something to do, IMO, with the heating of the cats or whatever this engine does to ensure that emissions are optimized in a cold system. There is more going on at this time than just a heightened idle. I am assuming this is what it is and have no idea why it makes this sound, but I certainly notice it on cold start ups after overnight or after a day at work when it's not hot outside.

Lol holy brand loyal or what? Relax was simply stating a similar experience with another car.

[2016SS]

Originally Posted by MAGAUSA

Are you all seriously spraying lubricant on your pulleys?

Nope just around them I've done this for nearly 20 years never once had a problem with it don't hit the belt is the key!

[MAGAUSA]

Originally Posted by 2016SS

Nope just around them I've done this for nearly 20 years never once had a problem with it don't hit the belt is the key!

How would this eliminate an unknown noise?

[2016SS]

Originally Posted by MAGAUSA

How would this eliminate an unknown noise?

We have a good ideal it is coming from the belt or the pulleys on cold starts I have not been able to confirm this yet. My cars away for the winter so I'm only limited right now.


When spring comes around I will go at it better. I just didn't have a lot of time with the car last year. My buisness expanded which forced me into crazy hours at work.

Are you having the same issue?

[MAGAUSA]

Originally Posted by 2016SS

We have a good ideal it is coming from the belt or the pulleys on cold starts I have not been able to confirm this yet. My cars away for the winter so I'm only limited right now.


When spring comes around I will go at it better. I just didn't have a lot of time with the car last year. My buisness expanded which forced me into crazy hours at work.

Are you having the same issue?

I have the same noise. I wouldn't call it an issue. Given the number of people noticing this I am inclined to think it's normal. Cars make strange noises when they are cold.

[SS 1LE]

Originally Posted by MAGAUSA

OMG, This is not a Nissan forum.

I notice this as well. It has something to do, IMO, with the heating of the cats or whatever this engine does to ensure that emissions are optimized in a cold system. There is more going on at this time than just a heightened idle. I am assuming this is what it is and have no idea why it makes this sound, but I certainly notice it on cold start ups after overnight or after a day at work when it's not hot outside.

Yeah, I thought about something like that too...but IMO that wouldn't sound like a pulley/belt chirp/squeak I would think? And if it did, I would have hoped GM to engineer it so it doesn't sound like that...but...

[SS 1LE]

Originally Posted by MAGAUSA

I have the same noise. I wouldn't call it an issue. Given the number of people noticing this I am inclined to think it's normal. Cars make strange noises when they are cold.

Many people do say they hear the same thing under the same circumstances, but we have no way to know if what everybody says they are hearing is indeed the same thing...

Regardless, I would still call it an "issue" as I have an issue with how it sounds and would like to try to track it down and stop it, as I'm sure others would as well. No matter how minor of a sound it may be.

[MAGAUSA]

Originally Posted by SS 1LE

Many people do say they hear the same thing under the same circumstances, but we have no way to know if what everybody says they are hearing is indeed the same thing...

Regardless, I would still call it an "issue" as I have an issue with how it sounds and would like to try to track it down and stop it, as I'm sure others would as well. No matter how minor of a sound it may be.

The noise goes away very quickly for me and doesn't last the entire time the engine is cycling through the cold start.

[SS 1LE]

Originally Posted by MAGAUSA

The noise goes away very quickly for me and doesn't last the entire time the engine is cycling through the cold start.

Mine either, maybe starts 2-3 seconds after cold start, lasts about 30 seconds or so....then it's gone.

[mitch03]

I took the car in for the chirp and diff. issue this week. They were able to fix the diff. for the most part. I had taken the car in a couple of weeks ago for the same issues to another dealer. They used the wrong oil for the diff Some folks just don't get it....it tells you what to use right on the tsb. The chirp wasn't fixed at either place and asked if I could bring it back. I will, only if it starts getting on my nerves. It's just 30 seconds...but it shouldn't do that!

[I`m Batman]

Could it be this?

“At startup, there are two injection events, a short pulse early and a second pulse late [both during the intake stroke]. The combustion gases from the later injection of fuel will still be hot when they exit into the exhaust, which helps heat up the catalytic converter more quickly. This gets the engine controller into closed loop quicker.”

[nukemustang]

glad I happened upon this thread. For a long time I thought I might be nuts or SEVERELY OCD, but I hear it too... most other people probably dont notice it, but I do too. I figured it was the idler pulley, or something, but haven't not commenced hosing down the pulleys/belt with any lubricants for fear of slippage, and its under warranty, and I am sure the dealer will be "unable to replicate".....

[SS 1LE]

Originally Posted by nukemustang

glad I happened upon this thread. For a long time I thought I might be nuts or SEVERELY OCD, but I hear it too... most other people probably dont notice it, but I do too. I figured it was the idler pulley, or something, but haven't not commenced hosing down the pulleys/belt with any lubricants for fear of slippage, and its under warranty, and I am sure the dealer will be "unable to replicate".....

Not sure if it's the pulleys. Slick3 had mentioned to me he scoped his while it was making the noise, and none of them seemed to be an issue, he thinks the noise if from higher up...may be DI related, but if it is you would think GM would have engineered this not to sound like a chirping, squeaky pulley for 30 seconds on cold start...I still would like to find out for sure what it is.