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Send PMspring hill, FL - USA
Joined: 5/18/2002
Posts: 92
Vette(s): 92 coupe, full minor custom, in & out
Is there any other water pump, for this motor?
I keep braking the gear shaft, when I run hard.
I thought about an electric pump, but I don't know anything about them.
Anyone using an electric water pump on a LT1?
Results?
Pro/Con?
Brand using? Why?
michael Black Sheep Squadron |URL|http://www.rogerscorvette.com/free/lintini.htm|/URL| |URL|http://www.cruisercustomizing.com/blackvette|/URL|
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Duncanville, TX - USA
Joined: 11/8/2003
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Vette(s): #1-1974 L-48 4spd Cp Med Red Metallic/Black deluxe int w/AC/tilt/tele./p/w-p/b/
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IF you keep breaking the shaft on the pump, it's possible there's an alignment issue with the front(timing chain) cover. Just a thought.
Not aware of any other system for the LT1, but there's bound to be some sort of electric pump out there somewhere, if only for racing applications...
Not aware of any other system for the LT1, but there's bound to be some sort of electric pump out there somewhere, if only for racing applications...
Joel Adams
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Replacing the original leaky pump with an electric pump seems to be a good subject to research. I have never used an electric water pump on any of my cars, including my race cars, but I know that they are available. I believe that they are available at places like Summit Racing. I will check it out.
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Electric water pumps for the LT1 are available at Summit Racing (http://www.summitracing.com/search/?keyword=LT1%20water%20pump&dds=1). Pardon my ignorance as a C4 noobie, but does the LT1 have an electric water pump from the factory? If so, would the aftermarket pumps be one of choice when replacing the GM pump?
proracr 2011-02-05 07:37:18
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Duncanville, TX - USA
Joined: 11/8/2003
Posts: 22714
Vette(s): #1-1974 L-48 4spd Cp Med Red Metallic/Black deluxe int w/AC/tilt/tele./p/w-p/b/
Am-Fm/map light National/Regional/Chapter NCRS "Top Flight"
#2-1985 Bright Red/Carmine Cp.L-98/auto
Member: NCRS, NCRS Texas, Corvette Legends of Texas
The LT1 water pump is driven off of the front of the cam, as is the Opti-Spark distributor. The location of the distributor directly under the water pump makes for a bad combination...water pump leaks will take out the Opti-Spark...
Joel Adams
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"Money can't buy happiness -- but somehow it's more comforting to cry in a CORVETTE than in a Kia"
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Go to the second page of the Engines forum (where we are now). Look for the posting by LT1*C4 on water pump and opti replacement. One of the best write ups ever done, even has pictures!
You need to find the primary cause of why the shafts keep breaking first. I agree with Adam, sounds like an alignment problem. When you take the old pumps off, are the bearings missing?
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My research shows that installing an electric water pump in the original water pump housing eliminates the shaft and would therefore eliminate your problem. Installing an electric pump requires removal of the water pump. removing the original shaft and impeller, plugging the hole where the shaft goes through the rear of the housing and plugging it with a freeze plug. Then you replace the front cover of the housing with the electric pump. I found an excellent thread on this procedure with detailed pictures: http://www.VetteRegistry.net/forum/new-opti-and-water-pump-install-dialup-beware_topic63282.html
proracr 2011-02-09 09:38:16
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Here is a video done by a friend of mine, just a straight replacement...
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in Forum: C4 Engines, Driveline and Handling
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