As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHILE ENROUTE FLIGHT DIVERTED DUE TO RT ENGINE HIGH OIL TEMP, THE ENGINE WAS NOT SHUTDOWN BUT AN EMERGENCY WAS DECLARED. MAINTENANCE RAN ENGINE AND DUPLICATED THE OIL TEMP ISSUE, REPLACED OIL TEMP BULB AND PERFORMED IMMERSION THERMOCOUPLE TEST. OIL TEMP GOOD.