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

guess what? water pump leaking

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Old Nov 14, 2016 | 01:51 PM
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Default guess what? water pump leaking

Hi everybody.
Hope you guys had a good Veterans Day Weekend!
I’m having a very small coolant leak coming from the water pump neck joint (the tube that goes out to the water heater), and I’m hoping that this will be a easy fix.
Have you guys seeing this before? Do you think that I can remove just the tube and then replace the “O” ring or add some plumbers tape?
Here is a pic of the location of the leak.
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Old Nov 14, 2016 | 01:55 PM
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and this photo is thanks to "higgyburners"
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Old Nov 14, 2016 | 10:26 PM
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Originally Posted by UGABUGA
and this photo is thanks to "higgyburners"
Just changed my WP but yours looks different. I think you have what they call a tall pump. If that pipe is threaded do you have room to turn it out. If so I'd put it on with some good sealer. I used blue on my heater hose pipe. Worked fine as best I can tell. You will probably have to move a bunch of AIR junk if the car is stock but if that makes enough room for the pipe to be turned out it beats taking off the compressor to remove the WP. As I write this it occurs to me that if the leak is really small you might get it with Stop Leak. not my favorite way if doing it but sometimes that stuff works out fine.
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Old Nov 15, 2016 | 06:25 AM
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How old is it? I have seen them rust out. Might be time for a new pump before you kill your opti.
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Old Nov 15, 2016 | 07:50 AM
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OP - I understand that the snapshot isn't yours but the one in the snapshot appears to not have the tube seated correctly into the casting. It's quite obvious to the eye. There's no o-ring seal it's a compressed/press fit to the casting. A once & done I'd think in a production assembly.

When you buy a new one it's something to check before the install!!

Last edited by WVZR-1; Nov 15, 2016 at 07:57 AM.
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Old Nov 15, 2016 | 10:56 AM
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As long as the water pump is off, are you going to replace the OptiSpark?
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Old Nov 15, 2016 | 12:17 PM
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Hey guys, Thanks for all the info.
I did replace the optispark and the crank seals about 10 weeks ago, and the water pump was in good shape, no leaks or rust. I was hoping that the pipe had threads....
I'm going to go insane because this will be the 4th time that I have to remove the water pump in 10 weeks. (I must be an professional by now) Fist time it was my fault because I waned to go cheap and replaced just the cap and rotor, second time it was the optic that fail after couple days, the third time was for the opitc repalcement( working well now) and now the "F" water pump!!!!

Thanks again for all the help and I'm open for more ideas....
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Old Nov 15, 2016 | 01:04 PM
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Yourgetting good at it. Did you pull the knock sensors to get a proper flush? You will not believe the crap in there.
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Old Nov 15, 2016 | 05:12 PM
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OMG! yes I did and it was HORRIBLE!!!!
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Old Nov 15, 2016 | 07:43 PM
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Handling pump that many times and removeing,installing hoses probably caused heater pipe to start leaking they are just press fit in cast housing,my pump showed rusted top hose pipe almost rusted thru when I did new coolant hoses.Rock Auto has new Gates, not reman pumps with lifetime warrenty about $65-$68.

Last edited by A Peter C4; Nov 15, 2016 at 07:46 PM.
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