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Draining coolant in 2003 Z06

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Old Jul 28, 2013 | 01:13 AM
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Default Draining coolant in 2003 Z06

I am having trouble getting the drain petcock open on my radiator. The shop manual is too vague. I am having difficulty figuring out what is the correct tool that won't slip and which way to turn the plug. I seem to remember there was something unusual about how it comes out but I'm not finding the info I need.
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Old Jul 28, 2013 | 01:46 AM
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It's easier to just pull the lower hose, and faster.
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Old Jul 28, 2013 | 09:17 AM
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Originally Posted by 8VETTE7
If it is still the OEM drain **** you need a square end 1/4" and turn it about 1/8th turn counter clockwise and it should come out a bit to start the coolant flowing.

Usually the plastic stopper is so brittle from heat that it breaks up. A thumb drive replacement is available at most parts stores.


Here is what the NAPA replacement looks like:

http://www.napaonline.com/Catalog/Re...0012%2b2012030
this is how I did it on my 99.
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Old Jul 28, 2013 | 09:23 AM
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What he said...

Originally Posted by Camjamsdad
It's easier to just pull the lower hose, and faster.
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Old Jul 28, 2013 | 11:29 AM
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Originally Posted by 8VETTE7
If it is still the OEM drain **** you need a square end 1/4" and turn it about 1/8th turn counter clockwise and it should come out a bit to start the coolant flowing.

Usually the plastic stopper is so brittle from heat that it breaks up. A thumb drive replacement is available at most parts stores.


Here is what the NAPA replacement looks like:

http://www.napaonline.com/Catalog/Re...0012%2b2012030
Okay, I got it out to drain the tank fully. Now, how do you get the drain plug out to replace it? For those who pull the hose it looks like you'd be leaving some liquid below the hose outlet.
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Old Jul 28, 2013 | 12:26 PM
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1/4 turn with a flat head screw driver.
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Old Jul 28, 2013 | 09:18 PM
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Originally Posted by Camjamsdad
It's easier to just pull the lower hose, and faster.
That just sounds like a potential bath!!!
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Old Jul 29, 2013 | 10:19 AM
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Originally Posted by jptgs1
That just sounds like a potential bath!!!
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