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

Flushing Cooling System

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Old Aug 8, 2014 | 12:16 PM
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Default Flushing Cooling System

Had my entire cooling system redone: new radiator,thermostat hoses etc. My 94 is running 10-15 degrees cooler now. When we did the update we couldn't get a good drain and flush because we didn't have the facility to do it. Do you think it would be worthwhile to take it to a pro shop, have the knock sensors removed, and flush the system correctly?
Thanks
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Old Aug 8, 2014 | 12:39 PM
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If you didn't remove the knock sensors, the flush wasn't complete.

Not only do you need to remove the knock sensors to drain that area, but you should direct water under pressure into the sensor holes several times to really complete the flush.
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Old Aug 8, 2014 | 12:45 PM
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Yes that's what I figured. I'm glad it's running cooler but I want to do it right.
Thanks for your reply.
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Old Aug 8, 2014 | 01:24 PM
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Originally Posted by seabright
If you didn't remove the knock sensors, the flush wasn't complete.

Not only do you need to remove the knock sensors to drain that area, but you should direct water under pressure into the sensor holes several times to really complete the flush.
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Old Aug 8, 2014 | 03:57 PM
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