Overheating - Ford Powerstroke Diesel Forum
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post #1 of 4 Old 10-10-2012, 09:45 AM Thread Starter
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Our 01 F450 has been losing antifreeze for a few months now since I replaced a bunch of parts (reservoir and upper/lower rad hose included). I thought I fixed the leak (loose clamp on the return nipple on the res) but I was looking at it last week and saw anitfreeze dripping off the bottom of the radiator. Both the upper/lower rad hoses are dry which leads me to believe it's a hole in the radiator.

Anyways, today our driver called me and said the truck had overheated and the water was boiling over. Anybody have any ideas where the leak could be? Would a leak cause this and what damage could have possibly been done?

it has been pretty chilly the past couple weeks there was a slight spike in the outside temperature today though (high 65)...

2001 F450 Dump, 7.3, 4R100
Mods: Adrenaline HPOP, New Factory HPOP lines, Rebuilt Fuel Bowl, International Bellowed Up Pipes, CCV mod, Deisel Site Intercooler Boot Kit, New Water Pump, New PS Pump, 203* Therm, New Injector O-Rings, New Oil Cooler and Filter Assembly, Vitin o-rings throughout and a few other things I'm sure I forgot to mention
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post #2 of 4 Old 10-10-2012, 11:17 AM
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I believe these trucks have plastic end tanks on the radiators. If so, I'd start looking for cracks in the plastic or where the plastic is joined to the aluminum portion of the radiator.

You may also verify that you aren't seeing leakage from the pet****.

If it's overheating, it's possible that it was the result of having low coolant (as there may not have been enough coolant to transfer the heat effectively), but you should probably verify that the thermostat is working correctly (opening).

If for some reason you had a big air bubble in the system (air wasn't purged when refilling coolant system), you could potentially see similar results (overheating).

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PIS 175/80, Adrenaline HPOP, 4" Exhaust, 6637 Filter, CCV Mod, Leveled Front, 315/75/16 Goodyear Duratracs
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post #3 of 4 Old 10-10-2012, 07:00 PM
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or the radiator front is full of junk. when i changed out to the 6.0 intercooler and trans cooler, i was surprised at how much trash was caught in the radiator. but if its leaking, i would guess it is rotten or cracked.

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post #4 of 4 Old 10-10-2012, 08:04 PM
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Pressure check the system and you should find the leak.

- Trey
"Jaws"- 2002 F250 XLT CrewCab Short Bed 4x4 7.3L

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