What was found
(CAN) AT TOP OF CLIMB, THE SECOND OFFICER NOTED AND INFORMED THE CAPTAIN THAT THE NR 3 ENGINE OIL TEMP WAS WELL ABOVE REDLINE. CREW CARRIED OUT HIGH ENGINE OIL TEMP SUPPORT CHECKLIST WHICH RESULTS IN SHUTTING DOWN THE ENGINE. CREW DUMPED APPROX. 13,000 LBS OF FUEL AND RETURNED TO DEPARTURE. AIRCRAFT LANDED WITHOUT FURTHER INCIDENT. TROUBLESHOOTING CARRIED OUT BY MAINTENANCE FOUND THE FIREWALL BULKHEAD CONNECTOR SHORTING OUT. AIRCRAFT IS AOG UNTIL REPAIRS AND VERIFICATION ENGINE RUNS CARRIED OUT.