As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ENGINE INDICATION OF HIGH OIL TEMPERATURE. SEAT IN ACCESSORY CASE FOR VERNATHERM CAME LOOSE PREVENTING POSITIVE FLOW OF OIL TO COOLER. WEAR PATTERN ON VERNATHERM AND SEAT INDICATE THE SEAT WAS INSTALLED COCKED AT AN ANGLE. RECORDS INDICATE ENGINE WAS OVERHAULED AT LYCOMING FACTORY.