coolant leak at #4 spark plug? - Chevy Cobalt Forum / Cobalt Reviews / Cobalt SS / Cobalt Parts
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post #1 of 2 (permalink) Old 05-28-2018, 06:33 AM Thread Starter
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coolant leak at #4 spark plug?

While changing plugs in my 2007 LT 2.2, 2DR, Auto Trans, non "charged", Cobalt I was surprised to find what seems to be coolant rising in the #4 plug hole while tightening the plugs to the recomended 15 ft/lb. Does anyone know what the #!;&? is going on here and what I can do about it? I have about 150,000 miles on it with zero problems save cleaning some electrical contacts on the door locks. Thank you for any information you may have!
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post #2 of 2 (permalink) Old 05-28-2018, 06:38 AM
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Well number 4 spark plug is close to the thermostat housing. Maybe you have a leak spraying coolant to plug 4. Check housing first then hope you don't have a cracked head gasket.

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