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Once everything was back in its place, all hoses were connected and the radiator was filled it was time to test it. After running the engine at idle for several minutes we used an infrared thermometer to check how well the engine was cooling. Once the engine hit approximately 217-220 degrees our fan turned on and cooled of the engine till 211, then the fan shut off again. That is still too warm, but at least with this new three-core radiator, the engine cooled off much quicker than with the stock two-core.