TC Tensioner Broke, Piston Fell into Base? - Chevy Cobalt Forum / Cobalt Reviews / Cobalt SS / Cobalt Parts
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post #1 of 2 (permalink) Old 10-17-2019, 02:03 PM Thread Starter
Join Date: Dec 2016
Posts: 38
TC Tensioner Broke, Piston Fell into Base?

'07 cobalt LS 2.2 L ecotec; 70K miles

Car had chain noise on startup, so I decided to replace the tensioner. This was straightforward, until I took the old one out. It had come apart, and when the housing and spring were removed, the piston appears to have fallen. From what I've seen of this engine's anatomy, it looks like the fallen piece(s?) might have just dropped into the timing chain 'chest'; or (worse), they could have gotten into the base.

My plan is to pull the TC cover, and see what I find. If anyone has ideas/experience with this, I'd appreciate hearing.
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post #2 of 2 (permalink) Old 10-17-2019, 05:12 PM
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Join Date: Mar 2017
Posts: 66
if you cant find the pieces inside the front cover area then that means it fell into the oil pan which youll have to remove to get the pieces out but its not that hard to do. just need to get some rtv to seal it back up
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tensioner , timing chain

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