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The Chevrolet Corvette, known colloquially as the Vette, is a sports car manufactured by Chevrolet. The car has been produced through seven generations.

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How to replace radiator drain petcock valve

drain valve wont turn open and needs to be replaced. How to get old one out and install new valve

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Hi @dougs57198,

What is the year and engine of the vehicle?


2003 std 5.7 base coupe with 1/4 turn white plastic valve which a sq driver just spins and valve does not open or come outwards. I have done it before OK a few years ago.



Not sure if access is easy but can you use a pair of multigrips and try pulling the drain cock out as you're turning it?


will give it a try, but now getting cold and I'm likely to delay for a while. Thanks for replies.


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Those valve are generally one piece and soldered into the radiator. If you are lucky, there may be a not on it and you can remove the valve itself and replace it. Not likely.

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Doug .S wird auf ewig dankbar sein.

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