Question about 1993 Ford F150 SuperCab

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I have a 1993 ford f-150 4.9l milky white residue under oil cap

No performance issues, white smoke,or over-heating

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I have seen that with my truck too. It happens when you mainly drive short distances. The oil does not stay hot long enough to evaporate all the water.

Posted on Dec 19, 2008


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I need to know how to tell if i have a blown head \head gasket

If you car is overheating often and white smoke come out the tail pipe when running, good chance it is. Easiest way it to check is the fluid in the radiator - look for oil floating on the top. If your cooling reservoir (off white container connected by a smaller black hose to the radiator) has fluid in it, check it or you can open the radiator cap (only when the engine is cool - hasn't been running - don't touch it until it's sat for a few hours if you used it) and use a turkey baster or similar to pull some fluid out. If you see some oil floating, it's most likely a head gasket.

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Do you have to ad coolant very offen? White smoke may be an indication of engine coolant getting into the compression chamber.Sometimes you can remove the oil filler cap and look at the underside of it for a white milky residue
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check your oil dip stick and under the oil cap to see if there is a milky brown foam. If so there is water in the oil. This can cause white smoke.

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Sounds like your head gasket is leaking coolant into one or more of the combustion chambers, do you have any water in the oil pan?(does the oil look milky? Or does the oil filler cap have a milky residue along with the overheating and white smoke you have, these are all tell tale sighn of head gasket failure.
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I am loosing water out of the cooing system. Got a new heater core thinking that was leaking. Turns out that it isn't. Where else could I be loosing so much coolant?

Obvious places include the hoses where they are clamped, the water pump gasket, and any fittings on the radiator, including the cap. Sometimes leaks only occur under pressure, so check while the engine is at operating temp and look for small streams pissing out from some of these places. Other leaks only occur when the engine is cold, in which case you generally find antifreeze on the ground. If antifreeze is dried up you can often still spot residue.

If all of that fails, it is also possible that you are leaking antifreeze into the engine via a leaking head gasket or other means. You would notice either puffy white smoke billowing from the exhaust if it is leaking into the cylinders, or you would notice a milky white residue in the oil if it is leaking into there.

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Lots of back fireing. does not run fast, white smoke

White smoke is generally a sign of buring antifreeze which is a sign of a blown head gasket. Pull your oil dip stick and see if the oil is milky white. Open your radiator cap and start the truck. Do you have lots of bubbling going on or is there a oily residue in the antifreeze? If so these are other signs of a blown head gasket.

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We have not ran the car in a while a little white smoke

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