ALTERNATE WAY FOR FUEL TO ENTER COOLING SYSTEM - Ford Powerstroke Diesel Forum is the premier Diesel Truck Forum on the internet. Registered Users do not see the above ads.
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Old 03-18-2014, 10:34 AM Rookie

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Hi, I have a 2000 f450 w/ 7.3 powerstroke, I have had a problem with fuel getting into the cooling system. I replaced the injector cups twice, I replaced all of them trying to repair the leak which had no cracks at all in any of the cups,and then did it again thinking that I might have made a mistake in the installation. After both cup replacements I still have fuel in the coolant tank. My question: is there any other way for the fuel to get into the coolant such as having a crack in the head or a bad seal ?, knowing that the fuel has a much higher pressure than than coolant I am not sure of the layout of the internal head. If someone has had this same problem please let me know how to repair this,or if I need to replace the heads. I am at my wits end on this problem, any help would be greatly appreciated!!. Thanks, Bill
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bad injector cup install, fuel in coolant

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