C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

Meziere E. water pump corrosion

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Old Apr 25, 2007 | 08:39 AM
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Default Meziere E. water pump corrosion

I am getting ready to buy the Meziere HD pump for my LT4. I remember seeing a post about a year ago that showed a corroded Meziere pump. The pump looked like it had some kind of electrolysis going on. Anyone seen or remember this?
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Old Apr 25, 2007 | 08:58 AM
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perhaps they werent using enough antifreeze in their cooling system?
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Old Apr 25, 2007 | 10:09 AM
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Id have to see this picture. How old was the pump? What part was corroded? Did they maintain their cooling system properly or just fill it up with cheap sh*t and forget it for 3 years?
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Old Apr 25, 2007 | 11:31 AM
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You are correct about the pump. Meziere recommended that I add 2 or more grounds including one directly to the pump. It has to do with the aluminum radiator, in fact they recommend grounding the radiator and I did not feel like pulling it to have a ground connection welded to it.
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Old Apr 25, 2007 | 11:33 AM
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Originally Posted by BigLee
perhaps they werent using enough antifreeze in their cooling system?
Antifreeze had nothing to do with it, there was an actual electrical current in the radiator/antifreeze that requires additional grounds to eliminate.
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Old Apr 25, 2007 | 11:42 AM
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So if this happened, would you possibly put it down to incorrect/incomplete installation (by failing to add the extra grounds)?
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Old Apr 25, 2007 | 11:49 AM
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Originally Posted by Casethecorvetteman
So if this happened, would you possibly put it down to incorrect/incomplete installation (by failing to add the extra grounds)?
Yes, if the install directions said additional grounds were needed. This info was not noted on their directions or on their web site.

Do you have to be an electrical engineer to install it correctly?
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Old Apr 25, 2007 | 11:57 AM
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Originally Posted by 85vet
Antifreeze had nothing to do with it, there was an actual electrical current in the radiator/antifreeze that requires additional grounds to eliminate.

very well then, it was just a guess. i know that many people often run cooling systems mith mostly water, with little, or even no antifreeze mixed in, and cooling system corrosion sets in quickly.

but like in your case apparently, electrolysis issues can occur as well.
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Old Apr 25, 2007 | 12:12 PM
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Please post back after the install and let us know how it went. I ordered a Meziere HD also. It was on back order. I should have it by next week.

Thanks
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Old Apr 25, 2007 | 12:12 PM
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I've been running a HD Meziere for over 4 years without any corrosion or extra grounds.

Are the extra grounds required for the L98 or LTx pump? I don't remember the mention of extra grounds in my LTx instructions.
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Old Apr 25, 2007 | 12:13 PM
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Originally Posted by 85vet
Yes, if the install directions said additional grounds were needed. This info was not noted on their directions or on their web site.

Do you have to be an electrical engineer to install it correctly?
Buggered if i know Im just asking a question in order to determine the probable cause of the corrosion.
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Old Apr 25, 2007 | 01:21 PM
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Originally Posted by 85vet
You are correct about the pump. Meziere recommended that I add 2 or more grounds including one directly to the pump. It has to do with the aluminum radiator, in fact they recommend grounding the radiator and I did not feel like pulling it to have a ground connection welded to it.
OK, thanks. I will add an extra ground just to be safe.
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Old Apr 25, 2007 | 01:40 PM
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Extra ground should do it. they also make electrolysis ***** for the radiator caps. Havent seen one in ages but they do exist. I would think the grounds will be enough.
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Old Apr 25, 2007 | 01:58 PM
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Originally Posted by cuisinartvette
electrolysis *****
That sounds like it would hurt.
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Old Apr 25, 2007 | 02:02 PM
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Thats another thread altogether.
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Old Apr 25, 2007 | 02:43 PM
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Originally Posted by STL94LT1
I've been running a HD Meziere for over 4 years without any corrosion or extra grounds.

Are the extra grounds required for the L98 or LTx pump? I don't remember the mention of extra grounds in my LTx instructions.
Actually it wouldn't hurt any year, grounds are a good thing. I know many people who have an electric water pump with no problems. But if there is a potential of a problem, then I will have it.

Thanks for the additional info Cuisinartvette!!!
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Old Apr 25, 2007 | 05:32 PM
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If the ground were bad enough to cause such a problem, the pump motor would have had a very short life. I'd bet major money that the corrosion was caused by ****-poor cooling system maintenance and nothing else.
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Old Apr 25, 2007 | 06:32 PM
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Originally Posted by Corvette Kid
If the ground were bad enough to cause such a problem, the pump motor would have had a very short life. I'd bet major money that the corrosion was caused by ****-poor cooling system maintenance and nothing else.
Sorry to disappoint, but the pump did NOT last a season. I sent it back to mezier and it had nothing to do with my maintenance. In fact my anti-freeze is changed out new each year and I have a Be-cool radiator.
You would lose the bet!!!!!!
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Old Apr 25, 2007 | 06:41 PM
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Originally Posted by 85vet
Sorry to disappoint, but the pump did NOT last a season. I sent it back to mezier and it had nothing to do with my maintenance. In fact my anti-freeze is changed out new each year and I have a Be-cool radiator.
You would lose the bet!!!!!!
So what'd they say the problem with it was?
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Old Apr 25, 2007 | 06:49 PM
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Originally Posted by Corvette Kid
So what'd they say the problem with it was?
That there was too much electrical charge in the system due to the aluminum radiator and the use of the electric pump. I have since installed the pump with a ground directly to the pump bolts and added 2 additional grounds to the motor. No issues for 2 years.
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