Join Date: Apr 2013
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black/white smoke at start
have an 03 F350 107,000 miles. when i start the truck after sitting for 10 hours i get white or heavy grey smoke out the exhaust. if the truck sits for 24 hours the smoke is more black. and when it sits for more then 40 hours i have to plug in the block heater to get it to start, which lets out a huge cloud of black and white smoke.
To me that sounds like an injector, not the head gasket letting coolant in to the cylinder.
already diagnosed with stuck vanes on turbo, egr and oil cooler failures, and head gasket; over pressure of coolant.