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L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

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Old 11-27-2010, 10:42 PM   #1
bossfan
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Default How to remove/replace 86 Low Coolant Sensor?

Stock 1986 Corvette Coupe: My radiator is confirmed absolutely full but the "coolant low" light comes on intermittently, around every 10-15 mins. I found this thread which helped clean the sensor connector:

http://forums.corvetteforum.com/c4-t...-light-on.html

But if the light persists how do I remove the sensor from the radiator to clean it and put it back? I tried to give it a twist but it only moved a millimeter or two, is there a specific technique required? Will coolant come flowing out if/when I am able to remove it?

Any help/advice would be appreciated,
bossfan
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Old 11-27-2010, 10:48 PM   #2
CorvetteMike2004
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You need to burp your radiator. You have trapped air pockets in your cooling system.

I use my ramps and put the front of the vette on the ramps. This makes my radiator a higher water level. With car at 180 degrees, I give it gas to about 1500 rpm's with the cap off. I fill the radiator then. Before letting rpm's drop put cap back on.
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Old 11-27-2010, 11:45 PM   #3
Pete K
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Quote:
Originally Posted by bossfan View Post
Stock 1986 Corvette Coupe: My radiator is confirmed absolutely full but the "coolant low" light comes on intermittently, around every 10-15 mins. I found this thread which helped clean the sensor connector:

http://forums.corvetteforum.com/c4-t...-light-on.html

But if the light persists how do I remove the sensor from the radiator to clean it and put it back? I tried to give it a twist but it only moved a millimeter or two, is there a specific technique required? Will coolant come flowing out if/when I am able to remove it?

Any help/advice would be appreciated,
bossfan
After 25 years, you can expect it to snap like a twig when you remove it.
Forget about cleaning it, and replace it.
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Old 11-28-2010, 07:00 AM   #4
pmihaltian
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Quote:
Originally Posted by bossfan View Post
Stock 1986 Corvette Coupe: My radiator is confirmed absolutely full but the "coolant low" light comes on intermittently, around every 10-15 mins. I found this thread which helped clean the sensor connector:

http://forums.corvetteforum.com/c4-t...-light-on.html

But if the light persists how do I remove the sensor from the radiator to clean it and put it back? I tried to give it a twist but it only moved a millimeter or two, is there a specific technique required? Will coolant come flowing out if/when I am able to remove it?

Any help/advice would be appreciated,
bossfan
You simply pry open the side claws and it pops right out. Put some petroleum jelly on the o-ring and pop the new one back in. Do it quickly as when you pull it out anti-freeze will run everywhere if you don't plug the hole or reinstall the sensor quickly.

http://www.ecklers.com/corvette-low-...1984-1989.html

Finally, you need to burp your cooling system to purge the trapped air out from under the thermostat. See attached write-up.
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File Type: pdf Corvette L98 Radiator Burp Procedure.pdf (72.8 KB, 253 views)
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Old 11-28-2010, 11:04 AM   #5
bossfan
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That explains it perfectly, thanks. Mine has a black zip-tie covering the claw section so I couldn't see they were claws.

Thanks again,
bossfan
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Old 11-28-2010, 11:04 AM
 
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