What was found
ON TAKEOFF LT OIL TEMP WENT TO 0, ABORTED TAKEOFF. SWAPPED GAUGES FROM RT TO LT, STARTED ENGINES, DID FIND OIL TEMP NEEDLE DID NOT RISE TAPPED ON GAUGE AND IT CAME UP. SWAPPED GAUGES TO THE ORIGINAL POSITION, RAN ENGINES AGAIN PROBLEM STILL FOLLOWED. REPLACED LT OIL TEMP PRESSURE GAUGE WITH AN OVERHAULED UNIT IAW MM CHAP 31-10-00.