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Chris Skalski: Network Engineer 2012 Kia Optima EX
My 2004 Jeep Grand Cherokee Overland (104K miles) is blowing white smoke with slight "sweet" odor inside the vehicle. Curiously, this started immediately after changing the spark plugs. Additionally, right about the same time, it started to overheat intermittently (some times it does, other times it doesn't) I've had to refill coolant occasionally, once a week or less and even then, it's never completely empty. Worried it was a blown head gasket, I did some testing and have ruled out the head gasket.
1) Cranked a cold engine with radiator cap off and no coolant came out of radiator. 2) Checked oil color and it was normal, not milky or thick, not burning excess oil from daily driving.
The vehicle runs smooth, never hesitates or misfires, plenty of power, always starts immediately and, except for light puffs of white smoke while driving (off and on all day) everything else seems ok. Any feedback appreciated.
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