What was found
FOLLOWING A FLT TEST, IN PATTERN WITH ACFT & NEW ENG, DEPARTED KLUD FOR THE 2ND BREAK-IN FLT IAW SERVICE INSTRUCTIONS. MADE A FULL-STATIC POWER RUNUP & INITIATED TAKEOFF IN KLUD. CLIMBOUT NORMAL, ENTERED LT PATTERN & DEPARTED NORTH FROM LT DOWNWIND VFR AT APPROX 2,000 FT. MAINTAINED A NORTH HEADING FOR 5 MILES, TURNED TO A NW. CONTINUED CLIMB & LEVELED OFF AT 4,500’ MSL. DURING THE CLIMB & BRIEF CRUISE, ACFT INDICATED OIL PRESSURE & OIL TEMP WITHIN NORMAL OPS RANGES. ABOUT 15 MINS INTO FLT, THERE WAS A LOUD POP, ENG COWLING JUMPED & NOTICED A HOLE ON TOPSIDE, OIL SPRAYED ONTO WINDSCREEN. TACHOMETER FELL TO ZERO & PROPELLER STOPPED. IMMEDIATELY STARTED TO PITCH NOSE DOWN TO MAINTAIN AIRSPEED & SET UP FOR ACFT’S BEST GLIDE SPEED. APPROACH WENT SMOOTH & WAS SET UP ON APPROX ½ MILE FINAL FOR LANDING IN FIELD. TOUCHED DOWN. BROUGHT ACFT TO A STOP.