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Vortex 6.0 water pump #5293835 12/13/19 08:51 PM
Joined: Mar 2016
Posts: 38
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chilson450 Offline OP
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Joined: Mar 2016
Posts: 38
I'm working on a high mileage Chevy 2500hd with the 6.0 gas engine. It seems to overheat when it's worked more than just cruising around empty. I was plowing snow a couple weeks ago and it was getting hot in a short time and I was not plowing any different than I ever have. Today I was pulling a trailer with a tractor on it down the highway and it was getting hot and it's pulled this load many times without trouble. This truck has had a new radiator and thermostat in the past couple of years. The fins don't seem blocked. I have also changed the fan clutch before. My question is can water pumps wear out without having a leaking? Can the impeller wear out? This truck has 460,000+ miles in it and it's still the original water pump.


2008 Chevy 2500hd 6.0
2011 Ford Explorer 3.5
Re: Vortex 6.0 water pump [Re: chilson450] #5293878 12/13/19 09:49 PM
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clinebarger Offline
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Cavitation could have done a number on that pump considering the mileage! You can pull the pump & pop the back cover off it to verify. Early LSx pumps had a bolt-on cover that made visual inspection easier & you could reinstall the pump if found good, Unfortunately that's not an option with the pressed in cover.

If you have a infrared thermometer.....Check for cold spots in the radiator core as your symptoms could point to a partially clogged radiator OR poor water flow!

Was the thermostat OE? I haven't had good luck with aftermarket ones!


2001 Chevy Camaro L92/4L80E
2006 Chevy 2500HD LBZ/Allison 1000
2010 Toyota Corolla 2ZR-FE/U341E
2000 Toyota Avalon 1MZ-FE/A541E
Re: Vortex 6.0 water pump [Re: chilson450] #5293933 12/13/19 11:36 PM
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JEL01 Offline
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It certainly sounds plausible assuming the fan clutch is operating per spec. Is it weeping at all?

Either way, impressive mileage, starting to see a lot of older (2000-2005/6-ish) GMTs with the LS based engines popping up with TONS of miles on them, guess they really built them right back in the day

Last edited by JEL01; 12/13/19 11:36 PM.

Cars I maintain:
02 Mercedes CLK430
09 Honda Accord V6
13 Lexus RX350 AWD
02 Toyota Tundra 4x4
18 Lexus GX460
Re: Vortex 6.0 water pump [Re: JEL01] #5293942 12/14/19 12:06 AM
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dogememe Online Content
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Originally Posted by JEL01
It certainly sounds plausible assuming the fan clutch is operating per spec. Is it weeping at all?

Either way, impressive mileage, starting to see a lot of older (2000-2005/6-ish) GMTs with the LS based engines popping up with TONS of miles on them, guess they really built them right back in the day

Yup 290k on mine. I think they are as good or better than the classic small blocks.


2010 Ford Escape 2.5 ~102K Miles: Castrol Magnatec 5W-20, Wix Filter.
2001 Chevy Suburban 5.3 ~290K Miles: Valvoline Maxlife 10W-30, ACDelco Filter.
Re: Vortex 6.0 water pump [Re: chilson450] #5294161 12/14/19 09:47 AM
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GoldDot40 Offline
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First and foremost, have the system pressure leak tested. A cooling system that won't maintain pressure will not function properly.


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