Cooling system expansion tank question

[secondchance]

Originally Posted by Wigert

I have already replaced the main thermostat but isnt there a thermostat in the cap? Looks like it but maybe I am mistaken...

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There is no thermostat in the radiator cap. It's spring loaded set to release pressure at predetermined pressure. Caps for Corvettes of the era was 14-15 psi.

[Wigert]

Originally Posted by secondchance

There is no thermostat in the radiator cap. It's spring loaded set to release pressure at predetermined pressure. Caps for Corvettes of the era was 14-15 psi.

My mistake, I very much appreciate you clearing that out. Okay so it's only a spring for pressure release.

If the engine is hot and running, should I in that case see a higher coolant level in the expansion reservoir up front at idle? If it has not leaked out elsewhere...

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[secondchance]

Originally Posted by Wigert

My mistake, I very much appreciate you clearing that out. Okay so it's only a spring for pressure release.

If the engine is hot and running, should I in that case see a higher coolant level in the expansion reservoir up front at idle? If it has not leaked out elsewhere...

Sent from my EVR-L29 using ZR-1 Net Registry mobile app

My guess is, if the overflow tank level is at its highest when the motor is at operating temp and at high rpm.