Question about 1990 Ford F150

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White smoke out the exhaust

My 1990 f-150 has been sitting for two years, just started driving it again, their alot of white smoke coming out of the exhaust, more when i accelerate, what should i do to make it stop smoking so much?

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Hi white smoke is from coolant in the cylnders bed head gasket.blueish white smoke is oil in the cylnders either bad valve seals or bad piston rings.must rebuild engine or heads.

Posted on Feb 14, 2009

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You will need to check head gasket. Please check the oil for coolant (milky deposition or presipitation). Also check if you loosing coolant and if coolant has oil in it.
Please kindly let me know if you need more info
Good Luck

Posted on Feb 14, 2009

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it sounds like the valve seals have dried out and need replacing.sitting for 5 years and not really being driven they have probably dried out.a common indication of this is when you start the car after sitting for a while you get smoke out the exhaust and don`t see the smoke when you are driving even though its burning oil just at a smaller amount.the vacume of the cylinder on the power stroke is enough that if the valve seal is bad enough oil will be sucked past the seal and valve guide into the combustion chamber and pools a little on top of the piston.then on start up the oil burns off the piston and out the exhaust,as well as while driving each cylinder that a seal is bad the engine vacume draws oil the same way and its burnt,thus you won`t necessarily see the burnt oil coming out the exhaust.you won`t hear any noise from the motor.knowing you have this problem check the oil regularly until its fixed.also check for any other oil leaks from gaskets as sitting will dry out gaskets and you may see some gaskets that may need to be changed.

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