2000 Ford F-250 7.3L - Leaking Coolant
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General Information: The customer came in with the complaint that coolant was leaking from his truck. He has to keep adding coolant in but it just pours straight out.
First Thoughts: I generally do not like working with coolant or anything leaking coolant. It just feels weird when it gets on my skin, and it always seems to get everywhere. I went to do a quick inspection and saw there were droplets of coolant towards the front of the engine. I was thinking a water pump.
Diagnostics: This truck was pretty easy to diagnose. All I did was add some water to it and watched it come out. It turns out that it was leaking out of the weep hole on the water pump.
A weep hole is on a water pump to warn that there is about to be seal failure. Usually when coolant is leaking out, it is because the seal has already failed and coolant is getting into the water pump bearing.
When I pulled this water pump off, the bearing was definitely bad. I could wiggle the pulley shaft up and down very easily. If the pump stayed on much longer, it probably would have done more damage.
I put the new water pump on and it worked flawlessly. I more leaks.
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