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

94 LT1 Water Jacket Plug Removal

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Old Feb 21, 2011 | 04:29 PM
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Default 94 LT1 Water Jacket Plug Removal

Hello,

Trying to take out he water jacket plug to put a manual temp sensor to control my second cooling fan switch and I am having a problem getting it out. I am using a 5/16th square bar stock tool but can't get the plug to budge. Any ideas on getting this out would be helpful. I have the coolent drained as I have just had to replace the radiator.
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Old Feb 21, 2011 | 06:07 PM
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You're not the only one. I ported f body heads and one sensor is on the wrong head. I think you may need to heat it, If you try that let me know if you wreck your head.
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Old Feb 21, 2011 | 06:49 PM
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It's a bear. In there extremely tight. Use a cheater bar if needed.
Mike
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Old Feb 21, 2011 | 06:58 PM
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who sells a proper tool for the square drive? I will let you know tomorrow if a little heat junks a head.
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Old Feb 21, 2011 | 08:28 PM
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Originally Posted by AZMike
Hello,

Trying to take out he water jacket plug to put a manual temp sensor to control my second cooling fan switch and I am having a problem getting it out. I am using a 5/16th square bar stock tool but can't get the plug to budge. Any ideas on getting this out would be helpful. I have the coolent drained as I have just had to replace the radiator.
I'm just kinda curious on what your electrical plan is. As you know the WP temp sensor is designed to drive the PCM and related software. The PCM operates the secondary relay to run the fan.

What kind of sensor are you using and what is it going to be connected to (or drive)?

Is this a kit, or did you did the new design?
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Old Feb 23, 2011 | 09:38 AM
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The amount of heat I felt safe using did not work for me. Then I rounded out the square hole. Yes, I started using bad language. my heads were off so I was able to drill out the plug and then chip the threads out with a pick. Not a fun couple of hours.
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