Question about 2001 Ford Super Duty F 450

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Changed thermaste and pipes are leaking under neath water have to top water up everytime i use the car

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It sound slike you changed the thermostat and now the system is leaking.

Check to make sure that both ends of the radiator hose are securely fastened. If it is, then check to make sure the thermostat housing is tightly fitted to the engine block.

If both are tight, it is likely your thermostat gasket is not seated properly and will require that you remove the assembly, prepare the surface again, make sure gasket is on properly and reinstall.

Here is a link to a video which discusses that process...

Posted on Sep 05, 2009

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2. Make sure the heater bypass hose is working. You could route the hose going into the interior heater and bypass the heater also.

It should eliminate a lot!

Next, consider the water pump.

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