water pump failure???
water pump failure???
Senior User
Joined: Apr 2004
Posts: 352
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From: Millbrook, AL
The primary symptom of water pump failure is leaking out the weep hole (bearing/seal failure). Only in EXTEREMELY high mileage vehicles have I heard of the impeller vanes "grinding" off. It sounds like you're having a problem with heat dissapation. Change the thermostat then you may wanna have the radiator rotted out or replaced. After eliminating the basics then you may wanna start looking more in depth at you motor. Good Luck.
Fleet Owner
Joined: Nov 2003
Posts: 27,918
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The primary symptom of water pump failure is leaking out the weep hole (bearing/seal failure). Only in EXTEREMELY high mileage vehicles have I heard of the impeller vanes "grinding" off. It sounds like you're having a problem with heat dissapation. Change the thermostat then you may wanna have the radiator rotted out or replaced. After eliminating the basics then you may wanna start looking more in depth at you motor. Good Luck.
I think a coolant system pressure is the best test. I am just now considering the best place to get the coolant pressure reading so I can get some data. The easiest place is on my coolant filter, but that is at the end of the line. The best place is probably at the block plug - I just do not want to drain my system completely (at least not so soon after flushing it).
Thread Starter
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old enough to know better
Joined: Nov 2006
Posts: 1,418
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From: republic of kalifornia
thanks Mark, that's the deal with me ,I don't have a coolant filter yet (that was going to be next) + I just did all this work & a flush also, but if the pump is bad the flush probably didn't do much anyway.
i guess it's back to the dealer sometime this week
i guess it's back to the dealer sometime this week
Hotshot
Joined: Jul 2005
Posts: 13,834
Likes: 26
From: Middle Tn.
If you replace the water pump go to the 05 pump. It is improved, larger impellers, over the early ones. You will have to change the timing cover behind it also.
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Thread Starter
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old enough to know better
Joined: Nov 2006
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From: republic of kalifornia
yeah, I read about the improved 05 pump in some older threads it just makes me 
to have to tear the truck down that far again after it was done just days ago
to have to tear the truck down that far again after it was done just days ago
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Post Fiend
Joined: Oct 2009
Posts: 12,123
Likes: 35
From: N. Fort Worth, tx
There are quite a few cases of the early 6.0L water pumps breaking off their plastic fins or the entire impellor coming off.
I think a coolant system pressure is the best test. I am just now considering the best place to get the coolant pressure reading so I can get some data. The easiest place is on my coolant filter, but that is at the end of the line. The best place is probably at the block plug - I just do not want to drain my system completely (at least not so soon after flushing it).
I think a coolant system pressure is the best test. I am just now considering the best place to get the coolant pressure reading so I can get some data. The easiest place is on my coolant filter, but that is at the end of the line. The best place is probably at the block plug - I just do not want to drain my system completely (at least not so soon after flushing it).
Fleet Owner
Joined: Nov 2003
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Wouldn't this be more of a test of the degas bottle pressure and not really the water pump discharge pressure?
Post Fiend
Joined: Oct 2009
Posts: 12,123
Likes: 35
From: N. Fort Worth, tx
im going a little slow tonight for some reason and not following. System pressure is system pressure. now if you want to test flow thats something different.
the whole idea about a cooling system is to equalize pressure threw the system to maintain even temp wich in theory will reduce localized boiling.
following me.... I am following you?
the whole idea about a cooling system is to equalize pressure threw the system to maintain even temp wich in theory will reduce localized boiling.
following me.... I am following you?
Fleet Owner
Joined: Nov 2003
Posts: 27,918
Likes: 3,636
im going a little slow tonight for some reason and not following. System pressure is system pressure. now if you want to test flow thats something different.
the whole idea about a cooling system is to equalize pressure threw the system to maintain even temp wich in theory will reduce localized boiling.
following me.... I am following you?
the whole idea about a cooling system is to equalize pressure threw the system to maintain even temp wich in theory will reduce localized boiling.
following me.... I am following you?
I guess that flow would be a better test, but not so easily monitored.
Edit - after a long day at work, I probably should wait til tomorrow to think this hard !!
Post Fiend
Joined: Oct 2009
Posts: 12,123
Likes: 35
From: N. Fort Worth, tx
OK now Im with you. I would say tap the bottom tank and install but try this out to test the theory. get the engine up to operating temp 185 -212 and use a pyrometer to pick the best spot to tap into.
besides a pyrometer is a great tools to have.
besides a pyrometer is a great tools to have.
Fleet Owner
Joined: Nov 2003
Posts: 27,918
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I just purchased an infrared pyrometer. It is cool! Thanks for the tip again.