I've had an intermittent engine knock for the past 2 years that the dealer has never been able to reproduce. It just started happening more frequently and I was able to take this video. I only notice the noise at idle, it seems that the cold weather may have an effect.

http://www.youtube.com/watch?v=LC_EjxG4tWQ

Any ideas?

 

timing chain tensioner my friend......GM has released a revised one to fix this issue

see my thread on this "Engine Rattle?"


EDIT: Where in Indy? I work at Hare Chevrolet and if yours is still under warranty, swing by. We normally have them in stock, but call parts first to verify and have your VIN ready.

 

Does it get better after it's warmed up? Timing chain tensioner?

 

Southside, I've been taking it to Hubler Chevrolet in Greenwood. My warrenty is good for another 400 miles. Is this something that would be replaced even if they can't reproduce the noise?

It seems to get better, but not always.

 

what is the warranty on this one... 3/36 5/60 or 7/100?

 

3/36 Bumper to Bumper
5/60 Powertrain

Ive got 35,400 miles on it right now.

 

show them the video...it's a pain in the ass to reproduce at the shop

that's what mine is

ü Powertrain Limited Warranty 06/13/2007 139 MI 06/13/2012 60,139 MI
ü Emission Select Component Ltd Wty 06/13/2007 139 MI 06/13/2015 80,139 MI
ü Corrosion Limited Warranty 06/13/2007 139 MI 06/13/2013 100,139 MI
ü Bumper to Bumper Limited Warranty 06/13/2007 139 MI 06/13/2010 36,139 MI

 

Is this affecting vehicles outside of the "Secret TSB" time frame? I think my car built sometime after that.

AIP3252

MODELS:
206-2007 CHEVROLET COBALT, COBALT SS
2006-2007 CHEVROLET HHR
2006-2007 CHEVROLET MALIBU
2007 PONTIAC G5
2006-2007 PONTIAC G6
2006 PONTIAC PURSUIT(CANADA ONLY)
2006-2007 PONTIAC SOLSTICE
2006-2007 SATURN ION REDLINE
2007 SATURN SKY

BUILT BETWEEN 4/1/06 - 11/1/06
WITH ANY OF THE FOLLOWING ENGINES
2.0 ENGINE (VIN P - RPO LSJ)
2.2 ENGINE (VIN D OR F - RPO L61)
2.4 ENGINE (VIN B OR P - RPO LE5)

 

you mean the "secret tsb" for the timing chain? I wouldn't worry about that

lol GM lists my car as "Model: 1AP37-2006 COBALT SS TURBOCHARGED COUPE"

turbo my ass

 

Cool, thanks for the help. I'm gonna give Hubler a call tommorow, if they still wont work with me I might be giving you guys a call.

 

Cool, just give me a heads up so I know you're coming. I'd hate to lose another CSS.net member over my coworkers being careless. Long story.

Wait, is Lembke your last name?

lol Ok, so do you have a sister named, Sandy? She was telling me her brother had a Cobalt SS/SC (before I bought mine 6/07). Just now hit me...

 

Haha, yea that's my sister.

 

haha That's crazy! I haven't seen her in almost a year now. I used to live with her best friend and hang out with all the other Ft. Wayne people.

 

I had just posted the same video (of my own car) a couple days ago. Sounds exactly the same!
http://www.youtube.com/watch?v=8FSf0-dTFLI&NR=1

 

Ahhh your the one with the british SS/SC ........everything is on the wrong side lol.

 

hahaha I just couldn't flip the video for some reason.

 

Wait, even cars PRIOR to 2007 have a 5yr/60k mile powertrain? I thought it was 3/36k just like bumper to bumper....

 

Nope 2005 and 2006 SS/sc's have a 5/60K powertrain warranty . It might actually be the whole cobalt lineup but i know for a fact the SS/SC's do.

 

mine has been replaced and still does it til this day goes away after 5 mins...it just needs to get lubed up after a lil bit

 

*Update*

Took it into the dealership last week for them to look at. We were able to reproduce the noise and they replaced the timing chain and tensioner under warranty. They weren't able to give me any more info than that.

 

Good. I'm glad they took care of you or I would have done it for you myself.

 

I have had this happen to me a few times but it happens here and there how the heck can I reproduce the noise at the dealer? I guess a video would be the best thing to do.