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Why would a Ford 390 blow white steam and water from one side of the dual exhaust?

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2015-07-17 17:29:31
2015-07-17 17:29:31

You possibley have a blown head gasket on the side that is blowing water and steam. 390 s are good solid blocks pull the head on that side and check carefuly to see if you can spot the bypassed gasket. If not a gasket a good idea to have the heads checked for cracks then the engine. Small steps.

could be a blown head gasket on that side, or a bad intake gasket.

The side you see white smoke from has a head gasket or cracked head problem.

If sparkplug has water or rust on it you have located the cyl of question. Is it the Intake manifold or head gasket. Water runing into intake valve would be noticeable when you pull the intake manifold. You might hear knock when motor is hot, that would indicate steam knock from blown head gasket. Piston in question would be steam clean from antifreeze hard blast on ignition................. ........ do a compression test, a week cylinder could indicate not only a blown head gasket but also tell you what cylinder.

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engine burning oil( white or blueish exhaust smoke ), water in oil, oil in water, water in exhaust.

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That would be steam or water vapor, which is water in air form.

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For steam to come out the exhaust you probably have a bad head gasket or a cracked head. If the turbo had an oil seal fail it would cause blue smoke to come out the exhaust.

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That's exactly what it is, water. The products of combustion are water and carbon dioxide. While the exhaust stays hot the water comes out as high temperature steam, usually you don't even notice it. When the exhaust pipe and/or outside temperature is cold enough the exhaust will cool and some of the water vapor will condense into steam and possibly even water that drips from a weep hole in the muffler. If you're seeing a little water drip from the muffler, everything is working as designed.

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That is condensation due to the exhaust system being cold and the heat from the engine makes the exhaust system / pipes sweat. As the exhaust system heats up then that will stop. Now you said WATER not antifreeze. If you had engine coolant running out of the exhaust then it would be the color of the antifreeze and it would be steaming WHITE and then you would have an engine problem, MAYJOR. You said water. Drive it you have no problems. That is normal.


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