Timing/balance Chain Quest - Chevy Cobalt Forum / Cobalt Reviews / Cobalt SS / Cobalt Parts
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post #1 of 2 (permalink) Old 09-17-2019, 09:02 PM Thread Starter
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Join Date: Dec 2016
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Timing/balance Chain Quest

'07 Cobalt LS, 70K miles

... which has what I suspect is chain noise: 'tinkling' after a cold start, that goes away after about a minute. (It also has a bad water pump, which is noisy with a listening stick. But, the water pump noise doesn't sound like the 'tinkling', IMO.)

Thoughts:
1. If the 'tinkling' is chain noise, the fact that it goes away after warm-up makes me think it could be a tensioner.
2. It looks like the timing chain tensioner would be a lot easier to change than the balance shaft chain one [1].
3. So, I'm thinking to just replace the timing chain tensioner and see what happens.

Question: Is this just a bad idea?
... or any other thoughts on the matter.

Thanks


[1] https://www.yourcobalt.com/forums/ma...tensioner.html
ge315 is offline  
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post #2 of 2 (permalink) Old 10-01-2019, 06:25 AM
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Join Date: Jun 2011
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Hi, I've replaced my timing chain and balance shaft chain twice. I would recommend just doing the whole job. It's a time consuming but you most likely have a broken guide in there. The guides are plastic and if not already broken, one soon will be.
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