2002 Polaris Freedom, Virage, Genesis PWC Service Manual, Page 116Get this manual
EngineCooling Engine AssemblyAll Engines 20Verify that Oring grooves in cylinders are cleanInspect surfaces of cylinder and cylinder head for nicks or scratches21Lightly oil new cylinder head Orings and install in groovesBe sure Oring is properly positioned and groove is clean and free from debris22Install cylinder heads and cylinder head support ringsTorque to specificationsNOTE: Cylinder heads must be positioned correctly with the wide opening toward the intake and the small opening toward the exhaustThe exhaust side will be labeled: "EX"