What was found
DURING TAKEOFF ROLL, THE NR 1 ENGINE EGT WENT INTO THE YELLOW RANGE FOR APPROXIMATELY FIVE MINUTES. THE EGT THEN SETTLED AT 910 DEGREES AT FL250. ALSO, THE NR 1 ENGINE NACELLE TEMPERATURE 'B' LOOP WENT TO TOP OF GREEN FOR FIVE MINUTES, WITH NR 1 ENGINE OIL PRESSURE OSCILLATING AT 3 PSI. CREW MADE THE DECISION TO DIVERT FLIGHT TO MSP FOR INSPECTION. THE ENGINE WAS CHANGED AND CHECK WAS NORMAL.