Engine noise!?

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Feb 3, 2009 | 07:57 PM

#51

jonnymerk

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From: Lakeland

My advice is have it checked. My prob turned out to have done a lot of damage. Lucky for me it was under warranty.

Feb 3, 2009 | 07:59 PM

#52

stoon_cobalt_colby

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From: Saskatoon, Saskatchewan

i still got lots of warranty i should prob get mine looked at but hasnt really done it in long long time

Feb 3, 2009 | 08:09 PM

#53

eurochevy

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Joined: 10-14-06

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From: Vancouver, BC

post a vid

Quote:

Originally Posted by nicksredline

ok so i have a question everyone is talking abou tthis being the tensinor or the chain??? and does it have to be between those years?( mine is making the same noise... only at idol and when i rev up it stops untill i come back down to the 1k rpm lvl again.) i drive an o4 ion redline ... could this be my noise( i always thought it was rockers / lifters where just super lowed/ thought i was loosing oil from somewhere.) the help would be super much appriciated.

most likely chain tensioner/chain ...mine was exactly how u described and i finally got them to put in a new assembly and it sounds great now

Last edited by eurochevy; Feb 3, 2009 at 08:09 PM. Reason: Automerged Doublepost

Feb 3, 2009 | 08:12 PM

#54

Cefaln452

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From: Cincinnati

VID B$ and after lol

Feb 3, 2009 | 11:05 PM

#55

nicksredline

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From: ohio

thanks for the help everyone( and sorry for jackin ur thread i hope u where done with it lol) kinda forgot figured it would be easier than makin my own thread.

Feb 4, 2009 | 08:01 AM

#56

Sh0nuff

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Joined: 08-09-07

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From: EAST TX

mine turned out to be the alternator...was crazy...it finally decided to take a crap, so I got a used one. no more crazy sound.

Feb 4, 2009 | 01:48 PM

#57

jonnymerk

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From: Lakeland

Quote:

Originally Posted by nicksredline

thanks for the help everyone( and sorry for jackin ur thread i hope u where done with it lol) kinda forgot figured it would be easier than makin my own thread.

No prob. This seems to be like a common problem and anyone with this noise should be aware.

Feb 5, 2009 | 02:27 PM

#58

stoon_cobalt_colby

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From: Saskatoon, Saskatchewan

Quote:

Originally Posted by jonnymerk

No prob. This seems to be like a common problem and anyone with this noise should be aware.

did u find out what it was

Feb 5, 2009 | 06:42 PM

#59

Unforgiv3n

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From: Dayton/Cincinnati

just as a heads up to all, I took my car into the dealership wednesday morning to get it checked out. Within an hour they diagnosed, and fixed the problem. It was the tensioner.... Thanks for the help guys.

Last edited by Unforgiv3n; Feb 5, 2009 at 06:48 PM. Reason: asdf

Feb 5, 2009 | 08:21 PM

#60

rukkee

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From: Western NY

Quote:

Originally Posted by jonnymerk

*update*

Got my car back and I bet you guys can't guess what was wrong lol.

Thats right prognosis was Timing chain tensioner binding. Why they didn't admit it over the phone I dunno. I think maybe they weren't ruling anything else out before. They ended up having to replace the camshafts, lifters, and rockers tho and of course the tensioner. Hundreds of dollars worth of parts all cus they scimped out on the assembly on a little bolt. At least this was all under warranty.

Quote:

Originally Posted by Unforgiv3n

Thanks you guy's for the update , it really helps other's who will see this ...even years from now lol.

Feb 5, 2009 | 09:55 PM

#61

jonnymerk

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From: Lakeland

Quote:

Originally Posted by stoon_cobalt_colby

did u find out what it was

Ya it was the tensioner, it just caused more of a chain reaction in the head then most others have got.

Mar 21, 2009 | 08:10 PM

#62

love my SS

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Joined: 07-23-05

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From: Brownstown, Indiana

i got a couple questions. how many miles did you guys have on these, and did the noise just start all at once? mine was fine then when i went out to go to the store, when i started it i thougt i had a diesel! wtf!

Mar 21, 2009 | 09:13 PM

#63

Johnboy12358

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Joined: 10-05-06

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From: DFW, TX

Anyone have a link to the TSB to print out? I have an 06, and I would like to get this fixed before it comes up at all.

Mar 22, 2009 | 10:08 AM

#64

Orange06SC

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Joined: 01-11-09

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From: Jacksonville, FL

I also would like a link to this TSB. I had a tech listen to it and he told me it was normal, immediately I said what happens if it get worse, let alone my engine goes ka-boom!! I mentioned everyone here complaining about this and stressed how serious it was. Mine does this knocking now on a regular basis once the engine is warmed up and after the idle dies down.

If it means anything my 06 has near 32k and I started hearing the noise around 28-29k.

Even though I'm out of 3/36 factory warranty (don't know if this is covered under powertrain warranty) I bought mine certified used and am taking back to dealer I bought it from, have them listen to it and get a 2nd opinion, or may go to another Chevy dealer.

Mar 23, 2009 | 12:58 PM

#65

Johnboy12358

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From: DFW, TX

My build date is 10/05, so I dont think mine is affected. I found the TSB in the General Cobalt section..

https://www.cobaltss.net/forums/show...ght=secret+tsb