As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ENGINE OVERHEATED APPARENTLY DUE TO LACK OF COOLANT. HEADS ON ENGINE ARE WATER COOLED. ORIGINAL COOLANT OVERFLOW BOTTLE MOUNTED ON FIREWALL HAS HOSE FROM COOLANT EXPANSION TANK ENTERING TOP OF OVERFLOW BOTTLE. HOSE WAS NOT SUBMERGED INTO COOLANT, THEREFORE, COOLANT COULD BE EXPELLED FROM ENGINE INTO OVERFLOW BOTTLE, BUT OVERFLOW BOTTLE COULD NOT SERVICE COOLANT BACK INTO ENGINE ON COOL DOWN.