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Old Dec 21, 2003 | 07:23 AM
  #1  
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Default Water Pump

Went down to the garage this morning to take a look at the hibernating machine and I spied a puddle of the green stuff where it didn't belong. Looks like I'll be changing the water pump. Any tips, tricks, pitfalls etc? Your advise is greatly apperciated. (72 350 4 speed w/ac.) Happy Holidays and thanks.
Ben :smash:
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Old Dec 21, 2003 | 07:49 PM
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Default Re: Water Pump (7vette2)

most often they leak from a "weep" hole in the bottom. That is to tell you the shaft seal / or bearing is shot.

Replacement is easy. Drain all coolant, un-do the radiator hose and any other hoses to it. Remove the water pump pulley, fan and any other brackets. Remove the water pump. Install new pump with new gaskets. This is the time to also install new hoses, belts, thermostat and all new coolant. As Chilton's say - "Installation is reverse of removal." Actually, if you get a Haynes or Chilton manual, they walk you through such things like this and tell you any info you need. A worth while investment.

Most people replace with a Stewart water pump. When you do get a pump, make sure it is the right one. The Corvette from 68-82 uses a short style pump, with a 3/4" shaft. It's basically a Corvette only part, so make sure to get the right one.


[Modified by BSeery, 8:58 AM 12/22/2003]
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Old Dec 22, 2003 | 07:34 AM
  #3  
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Default Re: Water Pump (BSeery)

:iagree:

Stewart pumps are great, and do the recommended maintenance while you're in there...
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Old Dec 22, 2003 | 08:17 AM
  #4  
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Default Re: Water Pump (BSeery)

The Corvette from 68-82 uses a short style pump, with a 3/4" shaft. It's basically a Corvette only part, so make sure to get the right one.
:iagree: Above..very important. Don't be fooled by adds that read "Chevy Small Block Short Wated Pump" It's a Vette part only...unless you want to change all your pullies.
Eddie
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Old Dec 22, 2003 | 08:54 AM
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Default Re: Water Pump (Silvr77)

Thanks guys. It looks pretty straight forward but I did want to check with people who have done it before, and I will replace the other parts suggested. Thanks again and Happy Holidays!
Ben :cheers:
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Old Dec 22, 2003 | 09:19 AM
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Default Re: Water Pump (7vette2)

Since you're draining the system anyway check out all the other components. Make sure all the hoses are good and you might also want to change the thermostat over to a fail-safe type. This thermostat will fail in the open position rather than closed and might save you some overheating isues if it ever goes bad. From experience I can tell you that changing the anti freeze to one of the newer extended life types also has it's advantages. When I ran regular anti freeze I always ended up with a lot of rust and scale in the system which caused me to change it every year. When i switched over to the newer type the rust problem went away and the coolant stays much cleaner. You can get this type of anti freeze from most auto supply stores. The one I use is reddish in color. Good luck.
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Old Dec 22, 2003 | 10:44 AM
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Default Re: Water Pump (7vette2)

I have a Stewart Stage 2 on my ZZ4 it is great. There support is also good if you have any problems with your pump.
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