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6.0L Power Stroke Diesel 2003 - 2007 F250, F350 pickup and F350+ Cab Chassis, 2003 - 2005 Excursion and 2003 - 2009 van

6.0 Coolant Leak

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Old Aug 8, 2015 | 02:00 PM
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6.0 Coolant Leak

My 2003 6.0 has a coolant leak. It leaks slowly while not running and more quickly while running. I have about an 8 mile drive to work every day, I can make it there and back without having to add coolant but I'm cutting it pretty close by the time I get home. In short I go from the max fill line to bone dry in about 24 hours.

With the truck running I can see water getting slung around all over the front of the engine but the majority of it seems to be coming from around the two larger pulleys in the middle.

I've read that this can either be the crankshaft seal or the water pump, any way to know for sure? Any other possibilities? Thanks for reading y'all!
 
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Old Aug 8, 2015 | 07:47 PM
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Moved to the 6.0 forum.
 
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Old Aug 8, 2015 | 10:13 PM
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I just went through this a couple weeks ago. It is hard to see exactly where the leak may be coming from. Pull the shroud, fan and stator and you'll be able to see what's leaking. In my case it was the water pump and the radiator was leaking at the top seam also. Could also be a coolant hose connection, front cover, or the big o-ring under the intake manifold.
 
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Old Aug 9, 2015 | 12:09 PM
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Thanks Rusty, my buddy and I will have to get under the good some time this week. I'll keep y'all posted.
 
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Old Aug 9, 2015 | 12:33 PM
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I had the same problem a while back pulled the shroud and fan and it was leaking from the freeze plug on the water pump.
 
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Old Aug 9, 2015 | 08:37 PM
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This one appeared to be leaking out of a square hole just above the freeze plug. Plastic impeller but it looked ok and bearings seemed good. Turned out radiator was leaking and truck got low enough on coolant to run hot. Thankfully, it didn't get too hot.
 
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Old Sep 1, 2015 | 05:19 PM
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Same issue here... small hole in the back near the freeze plug. Can't really see it without total dis-assembly and then you are like ... can't be.

Sure enough! You can see it;s been leaking from the darken metal.

 
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