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Cooling system flush

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Old 01-04-2017, 10:58 PM
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fourth vette
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Default Cooling system flush
Any one have tips on how to drain radiator and block of old coolant and refill.
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Old 01-04-2017, 11:06 PM
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LMB-Z
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Warm engine to open thermostat, open drain on radiator, refill.
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Old 01-04-2017, 11:18 PM
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Originally Posted by LMB-Z
Warm engine to open thermostat, open drain on radiator, refill.
What about the block?
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Old 01-04-2017, 11:22 PM
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HBsurfer
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Repeat that process until clear water comes out. Took me four refill/drains cycles.
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Old 01-04-2017, 11:41 PM
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torquetube
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Originally Posted by fourth vette
What about the block?
You can open the block drains. Most people don't bother with this.

Only about half the coolant will come out if you drain the radiator alone.
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Old 01-05-2017, 12:10 AM
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Not So Fast
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Took me about 3 hours , 3 flushes to get clear, goes slowly
NSF
https://www.corvetteforum.com/how-to...adiator-368427
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Old 01-05-2017, 12:24 AM
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Drain the radiator.
Take off the lower hose to drain the block.
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Old 01-05-2017, 10:14 AM
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choppychop
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Dont forget to burp it
https://www.corvetteforum.com/forums...m-burping.html
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