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Discussion Starter #1
Hey fellas,

My son has a 2007 Cobalt LT. He has had an intermittent cooling system error code. Last year I replaced his coolant sensor. The code still comes back. He bought an ACDelco OEM thermostat. Tomorrow I plan on doing a thorough cooling system flush. He has 106,000 miles.


A friend of mine suggested a citric acid flush of the cooling system. Is there any downside of doing this with an Ecotech engine?

Or is there a more thorough way to completely flush and clean out the entire coolant system?

Thanks for any helpful information!
 

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What's the code?

By the way, my 2008 has 221,000 miles and I have never done a coolant flush. I know I need to do it.

Sent from my SM-G950U using Tapatalk
 

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Discussion Starter #3 (Edited)
I accidentally posted the wrong code (that's another problem). I'm waiting for an answer from him regarding the coolant error code
 
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