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Discussion Starter #1
New to this forum and my first post. All those with the 4 cyl DIC know about the noise they make. Would like to share thoughts on how the best way to lessen the noise coming from the engine/injectors. GM has put some insulation under the hood and a little on the firewall. But we need more sound deadening!
Also would like to undercoat to get rid of some of the road noise. I have other issues but will check rest of posts first.
Thanks,
Chuck
Naples, Fl.
 

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In the past, I've personally undercoated every vehicle I've purchased new. We've not done this to the 'Nox yet because it is so quiet. (or I'm getting old and lazy, not sure yet....)
 

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I've had my Terrain for 5 weeks now and love everything about it except for that tic, tic, tic, etc..... coming from the fuel injectors. I have the DI4 engine. Now that it is getting warmer out I can open the windows and when you come to a traffic light and sit there idling you can hear it tic tic ticing away. I don't know about anyone else but, I hope GM plans on coming up with a solution to quiet this ticing. To me, I didn't lay down this kind of money for a new vehicle to have to listen to it ticing away. To me and everyone else that hears it, it sounds like it needs a valve job. Does anyone know if GM is going to address this issue. I was told by the dealership that you well see more & more engines going this route and to get used to it. Not exceptable to me. How about you??
 

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I guess maybe we've been spoiled by cars over the past couple of decades. In the 60's and 70's cars were extremely noisy compared to today. All kinds of clicks, rattles, squeeks, squeals, etc etc.

I've had one person in a parking log comment on the clicking. I just told him it was an effect of the 'Nox getting 32 MPG. He nodded and looked impressed. 'nuf said.

I'm sure they'll figure it out as time goes on. Everything advances given enough time, cars especially.
 

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I find the ticking to be perfecty acceptable now that I know what it is, that it is supposed to be there and that it doesn't cause any kind of damage or problem.
Like the whine of a turbo on a Solstice GXP, the rattle of a dry clutch on a Ducati or the sound of a gear driven cam shaft on a Honda V4; It's the sound of a specific kind of technology, that I've bought & paid for, doing what it is suposed to do.
 

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The tic is perfectly normal. Get used to it as its the sound of fuel economy and power.

Comparing our I4 Terrain to my I4 Golf TDI the Terrain is far quieter. lol
 

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Let's see :

TDI Noise > Equinox Noise

TDI Economy > Equinox Power

Therefore, The more Noise you have, the more Economy you will have !!!

With that type of thinking, my old Citation should have gotten 200 mpg.
 

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LOL

With the music down low you can hear the DI but to me that is the sound of progress. Yes, its a little loud but its a good noise.

Also, if someone asks about it, you can inform them!
 

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I just got my Nox today, also a 4cyl, maybe i was paying attention, i didn't hear any tinking sound might be because the rain outside, i didn't open the windows yet. In addition, i have a 03 chevy Impala before, i think the new Nox actually quieter inside and less road noise. The 03 Impala is indeed a little outdated.
 

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Discussion Starter #10
Thanks for all the replies. At least it's not really an issue and just "normal". Don't you just love that reply from the service guys when you have an issue.
 

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Just an FYI, apparently there is a TSB on the loud ticking.

Good news! There is now a fix available for the ticking noise. In response to my November inquiry, a GM engineer emailed me today that 2010 Nox's with 4 cyl engines built between Sept 2009 and Feb 2010 used fuel pumps that were not up to GM quality standards resulting in the loud ticking noise. The problem has been fixed and replacements are now available at SPO.
Now, apparently the only thing that is wrong with the fuel pump is the "extra" loud ticking. Mind you, it will STILL tick after it gets replaced. Also, to replace it, the engine has to be torn into as its the mechanical fuel pump that is run by the timing chain from what I can gather.

Ours was built Mar 11 and it still ticks. Its not loud but it is noticeable. I would not tear into the motor to replace something that was just an annoyance. Ive lived with loud lifters, piston slap and more annoyances on engines that did nothing but preform flawlessly aside from the strange noise.
 

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My ears may be shot from Woodstock, because I can't hear any ticking - still have Jimi Hendrix playing in my ears - "purple haze all through my brain" !
 

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Discussion Starter #15
So bballr4567, did you ever find out the TSB number for the fuel pump replacement? Two weeks ago my dealer knew nothing about it. Also, If there is a TSB do I just go in to the dealer(service dept.) and tell them I want it done.
As a side note I started up three NEW 4 cyl Nox,s today and all three were way quieter than mine with 1700 miles on it. Also checked oil and it is finally starting to change color. It was originally almost clear but has turned to medium brown.
 

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Oil is supposed to change color. If it stayed clear the whole time it was in the engine then it wouldnt be doing its job!

I have no found anything else about the supposed TSB that was posted on GMI. I have no idea what was done to his vehicle.
 

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I had a Brand New Oldsmobile Cutlass Supreme back in 1997 and this famous ticking sound was there... I think that this is the technology from gm to achieve good fuel economy with their engines that have to do with this "problem"
 

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I hope our technology is not 13 years old. Most of the ticking is coming from the Direct Injection - not on Olds vehicles in 1997, I don't believe.
 

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ANC does not cancel the injector noise.



SnowItch said:
Hi Chuck,

Welcome to the forum.

Interesting post - not that many people have complained about the noise. For most, the Active Noise Cancellation does a pretty good job. There was one poster on the forums that actually returned his vehicle because it was making far more noise than what was normal.

http://www.equinoxforum.net/index.php?topic=171.0

The engines in both the 4 and 6 cylinder versions are direct injection engines, and they do make a tapping sound. If you read that thread, you will notice that different people hear different levels of noise.

I'd suggest that you post any questions or observations in that thread as opposed to starting a second thread (this one) with much of the same information.
 

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Maybe I'm used to the ticking because my car is a Solstice GXP (also DI) and it ticks LOUDLY. I honestly can say I have not even heard our 4 cyl Equinox ticking during the week we have had it. I will listen harder next time!
 
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