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While driving I noticed white smoke from around exhaust area, 7.3 engine was not running hot. I pulled over immediately turned off engine and lifted the hood. Top radiator hose had blew open and I had truck towed. Replaced hose and tried to start but radiator cap which was not locked and it flew above the hood. Replaced fluid and tried again and blew the overflow hose off. Tried again with cap off and a fountain of fluid high above the hood. No visible oil in coolant and no visible coolant in oil. Have been told blown head gaskets…need more input please.
 

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Don't know how you got to 12:44 PM, my clock is at 12:29 PM.

Anyhow, your Rad hose that blew could have been just old.

Rad Cap should be 13 PSI, some use a 16 PSI Cap.

Did you have the cap on and tightened when the overflow hose blew? That should never have happened unless the hose is plugged.

Replace the OF hose and Cap. Try again, run it up to temp and let us know what happens.
 

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If the radiator cap blew off even without it locked down, and went that far there is a pretty serious leak into the combustion chamber(s) somewhere. It's hard to speculate by staring at a 'puter screen. There won't necessarily be any oil in water or the other way around. If it sits with the piston in that partiular cylinder at the bottom of its travel there might be a hydrostatic lock. If the leak is bad enough, it would most likely do as you described, and push a gyser out the top of the radiator. I wouldn't think a blown head gasket would blow that hard without giving at least SOME warning, but then strange things happen all the time.
 
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