Flight Crew Commercial; Flight Crew Flight Instructor; Flight Crew Multiengine; Flight Crew Instrument
Flight Crew Last 90 Days 100; Flight Crew Total 450; Flight Crew Type 150
Situational Awareness; Troubleshooting
Aircraft Equipment Problem Critical; Inflight Event / Encounter Other / Unknown
Flight Crew Landed in Emergency Condition; Flight Crew Returned To Departure Airport; General Maintenance Action
Aircraft; Equipment / Tooling
Upon going around at ZZZ; on Runway XX; our Cessna 152 began to struggle to climb; combined with [an] rpm drop. Both student and I confirmed oil pressure and oil temp were in the green arc; 10 seconds later our oil pressure began to drop and oil temp began to rise. At the first indication of the changes in operating range; I pitched for best glide and [requested priority handling]. I turned 180 degrees back to ZZZ and let Center know of the situation and changed over to advisory and did the same. The motor began to shake itself apart and we glided back and made the runway safely. Upon inspection from Maintenance; the motor has suffered internal failure and will need a new motor.
C-152 Flight Instructor reported engine failure shortly after takeoff resulting in a turn back to departure airport.