Verifying Meziere Water Pump Functionality
Thread Starter
Pro
Joined: Jun 2002
Posts: 544
Likes: 0
From: La Jolla California
Verifying Meziere Water Pump Functionality
Is it possible for LT1 Meziere water pumps to come wired backwards from the factory? What behavior would a backwards running pump exhibit? When running the pump w/ the engine off but warm and the radiator cap off, I can see a stream of water coming from the head-head crossover tube into the radiator. The stream was coming out slower than what I had seen w/ my stock gear driven pump. With my stock pump, the stream would be blasting out of the hole. Also, it seems that the output hose from the radiator gets hotter sooner than the one on the input side. Is this normal? Are there any other ways to verify the pump is working correctly?
I have the blue wire going to a 12v ignition source and the black wire to a ground as per the instructions. Also, the plug can only fit on one way, so I couldn't have wired it backwards.
Thanks for any ideas!
I have the blue wire going to a 12v ignition source and the black wire to a ground as per the instructions. Also, the plug can only fit on one way, so I couldn't have wired it backwards.
Thanks for any ideas!
Team Owner
Joined: Nov 1999
Posts: 32,782
Likes: 11
From: Former NCM Drag Racing coordinator, National director Corvette Challenge Spring Hill, Tennessee: Whiting, New Jersey
Cruise-In VI Veteran
Cruise-In VII Veteran
Re: Verifying Meziere Water Pump Functionality (Langadorf)
Meziere did have some quality control problems that caused a defect in the pump I got. Shoot them an e-mail explaining your problem, I'm sure they will help. The did a great job for me correcting my problem.
[Modified by mackeyred96, 12:38 PM 10/12/2002]
[Modified by mackeyred96, 12:38 PM 10/12/2002]
Le Mans Master
Joined: Oct 1999
Posts: 9,713
Likes: 3
From: Sachse Texas
Cruise-In I Veteran
Cruise-In II Veteran
Re: Verifying Meziere Water Pump Functionality (Langadorf)
Reverse the wire connections and see if there is an improvement. One of the items in the instructions is to check to make sure the pump is turning in the correct direction. (I skipped this item too)
Racer
Joined: Feb 2002
Posts: 362
Likes: 0
From: In
Re: Verifying Meziere Water Pump Functionality (Langadorf)
I have a remote located CSI wp on my 86 and found that it had to be primed(meaning the cooling system had to be very full for the pump to be able to grab and then push the fluid) or I experienced the trick that you describe also. just a thought.
Le Mans Master
Joined: Oct 1999
Posts: 9,713
Likes: 3
From: Sachse Texas
Cruise-In I Veteran
Cruise-In II Veteran
Re: Verifying Meziere Water Pump Functionality (BrianCunningham)
which way is there LT1/4 pump supposed to turn?
Stock direction or opposite?
Stock direction or opposite?
Chris
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter
Joe Kucinski
8 Coolest Corvette Pace Cars (and Replicas) of All Time
Verdad Gallardo
Top 10 Corvette Engines RANKED by Peak Torque (70+ Years of Muscle!)
Joe Kucinski
Corvette ZR1X Will Be Pacing the Indy 500, And Could Probably Race, Too!
Verdad Gallardo
Top 10 Corvettes Coming to Mecum Indy 2026!
Brett Foote
Top 10 C9 Corvette MUST-HAVES to Fix These C8 Generation Flaws!
Michael S. Palmer
10 Revolutionary 'Corvette Firsts' Most People Don't Know
Joe Kucinski
5 Reasons to Upgrade to an LS6-Powered Corvette; 5 Reasons to Stay LT2
Michael S. Palmer
2027 Corvette vs The World: Every C8 vs Its Closest Competitor
Joe Kucinski
Melting Slicks
Joined: May 2001
Posts: 2,143
Likes: 7
From: San Diego CA
Re: Verifying Meziere Water Pump Functionality (Vette92)
which way is there LT1/4 pump supposed to turn?
Stock direction or opposite?
It says for sure in the directions, but I want to say it is supposed to turn counter clockwise. I am not possitive though and my directions have long since been thrown away. If it is turning correctly, you should see a steady stream coming out of the return hole in the coolant fill tank and the water will be streaming from right to left.
Chris
Stock direction or opposite?
It says for sure in the directions, but I want to say it is supposed to turn counter clockwise. I am not possitive though and my directions have long since been thrown away. If it is turning correctly, you should see a steady stream coming out of the return hole in the coolant fill tank and the water will be streaming from right to left.
Chris
Water should be shooting from the top tube below the cap seat (not the overflow tube).
Don't run the engine until it is working correctly.
Pro
Joined: Sep 2002
Posts: 500
Likes: 0
From: Mississauga ONT
Re: Verifying Meziere Water Pump Functionality (John Row)
my friends z28 pump was grinding on the housing plate of the mezziere, he loosened th ebolt and made sure it spun freely. All i know it water blasts outta mine and the car stays cooooold no matter how hard i drive. Mezz rocks.
