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Well this is the second time i've sea foamed my car, i did it through the vacuum intake, but instead of smoking out of my exhaust, it smoked from where my exhaust would connect to the engine, does this mean my exhaust inst connected? or is there a leak? can i still start it and let is smoke? its just scary because its coming from the hood instead of my exhaust and i'm somewhat clueless when it come to diagnosis on cars.
this is a 2.2 cobalt ls 2005
 

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Cracked exhaust manifold or gaskets. Take off the shield and take a look.

You can blow smoke into the exhaust pipe with a smoke machine and watch the exhaust manifold to see where the leak is. Probably cheaper to rent a machine than to have a shop diagnose it.
 
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