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Reply to "overheating"

Totally agree with the other diagnosis on the 71 radiator issues. You can confirm what it is by using a laser infrared sensor to diagnose what is going on with your 71 radiator. Should be hotter at one tube and cooler at the other tube with a definite heat pattern to the radiator as well. If most of the core is cool, this is bad and an issue with the splitting of the radiator areas internally.

The other thing you could check is if you have a cracked cylinder head or a failed head gasket that is pressurizing the cooling system. There is a sensor that measures carbon monoxide in the engine coolant. I don't know what it's called, but this special sensor will detect carbon monoxide in the engine coolant.

Best of luck!!!!!

Mark
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