c5 corvette
Fill the cooling system through the surge tank.
Fill the cooling system with a 50/50 mixture of DEX-COOL® coolant and deionized water.
Start the engine.
Allow the engine to idle for 1 minute.
Install surge tank cap.
Cycle the engine RPMs from idle to 3000 in 30 second intervals until the coolant temperature reaches 99°C (210°F).
Shut off the engine.
Remove the surge tank cap.
Start the engine.
Allow the engine to Idle for 1 minute. Fill the surge tank to 12.7 mm (0.5 in) above the COLD FULL mark on the surge tank.
Install the surge tank cap.
Cycle the engine RPMs from idle to 3000 in 30 second intervals until the coolant reaches 99°C (210°F).
Shut off the engine.
Remove the surge tank cap.
Top off the coolant as necessary, 12.7 mm (0.5 in) above FULL COLD mark on the surge tank.
Rinse away any excess coolant from the engine and the engine compartment.
Inspect the concentration of the engine coolant.
Install the surge tank cap.
You didn't give a lot of info to go on...but another possibility is a missing or severely damaged center air dam and/or a front spoiler/splitter that does not allow sufficient air flow. You still need the center air dam even with a spoiler/splitter that allows air flow.
Good luck!
You didn't give a lot of info to go on...but another possibility is a missing or severely damaged center air dam and/or a front spoiler/splitter that does not allow sufficient air flow. You still need the center air dam even with a spoiler/splitter that allows air flow.
Good luck!

You didn't give a lot of info to go on...but another possibility is a missing or severely damaged center air dam and/or a front spoiler/splitter that does not allow sufficient air flow. You still need the center air dam even with a spoiler/splitter that allows air flow.
Good luck!

If overheating after opening the cooling system then an air lock would be feasible; but if overheating from the time you bought the car then that would be different.
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If any of those areas are clogged, the car will not cool properly and it will overheat.
https://www.corvetteforum.com/forums...an-2015-a.html
Vote for the C5 question in the poll !!
If any of those areas are clogged, the car will not cool properly and it will overheat.














