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    Thread: 2008 Aveo LS, Chugging/Rough Idle, No CEL

    1. #11
      Almost time to do my timing belt
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      Quote Originally Posted by zaksglass View Post
      ... Compression came back, all four cylinders were very close (1-3psi). ....
      Even compression on all cylinders would be uncommon for a blown HG, unless the gasket was damaged evenly (which would be quite unusual). What were the compression readings? Did you remove the coolant overflow tank cap to see if there was any bubbling in the tank during the compression test? If not, do you have any other evidence of a bad gasket?

      The 'white residue' could be something as simple as normal condensation which didn't have enough time to get burned off because the engine wasn't sufficiently hot long enough. It would be really disappointing to do the gasket, only to find out it wasn't blown at all, and not the cause of your performance issue.



    2. #12
      What's wrong with my car?
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      There was some bubbling. I drove it a couple weeks ago after changing some ignition/intake parts, it ran smoother. Drove about 60 miles on the highway, and I burned coolant and oil.

      The timing parts will be the first to come off. I had suspected the timing was off a tooth, but after burning coolant and oil figured it was the head gasket.

      Edit: Forgot to mention that even though it ran smoother, I still had a rough idle and misfire, on top of burning coolant and oil.
      Last edited by zaksglass; 04-14-2018 at 12:39 AM.

    3. #13
      I'll keep it and add a turbo
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      For what it's worth, several people have reported that platinum plugs have caused problems with their Aveo and better luck with regular copper and/or Iridium plugs.

      It might be worth getting some new cheap-ish copper plugs to test

    4. #14
      What's wrong with my car?
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      Got down to the timing components today. The front camshaft sprocket is off by two teeth.





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