Crankase crack
in 912 / 914 Technical Questions
7 years ago
Dear all,
Rotax 912 ULS year 2005, TTSN 530 Hour.
I've found this crack in the upper crankase in cyl 3 area . Any experience ? Any suggestion ? Any possible causes ? Note that 15 hour ago have been replaced all the cylinder (3 and 4) studs due to oil leack at the Cyl 3 top forward base.
The replacement has been done in acordance with the heavy maintenance manual and the new head torque procedure described by the new SI-912-025 Cylinder Head Torque Procedure.
Can this studs replacement be related to the crankase crack ? Note also that the engine has been flown in a hight outside temperature 37 - 39 degree Celsius but with the operating indicated temperature within the limits.
Lookig forward to hear from you
All the best
Stefano
Rotax 912 ULS year 2005, TTSN 530 Hour.
I've found this crack in the upper crankase in cyl 3 area . Any experience ? Any suggestion ? Any possible causes ? Note that 15 hour ago have been replaced all the cylinder (3 and 4) studs due to oil leack at the Cyl 3 top forward base.
The replacement has been done in acordance with the heavy maintenance manual and the new head torque procedure described by the new SI-912-025 Cylinder Head Torque Procedure.
Can this studs replacement be related to the crankase crack ? Note also that the engine has been flown in a hight outside temperature 37 - 39 degree Celsius but with the operating indicated temperature within the limits.
Lookig forward to hear from you
All the best
Stefano
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