As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN)ENGINE WAS RUNNING ROUGH ON TAKEOFF POST FLIGHT INSPECTION FOUND THAT #3 CYLINDER HAD A BAD OIL LEAK AT THE BARREL/HEAD AND WAS STARTING TO SEPARATE THERE WERE FUEL STAINS AT THE INTAKE PORT THE CY LINDER HAD BEEN RUNNING HOT AND THE EXHAUST VALVE GUIDE WAS WORN. THIS ENGINE HAS BEEN OPERATING USING AUTOMOTIVE GASOLINE.