MTU 12 V 4000 M23F Operating Instructions Manual page 168

Evaluation of findings and further measures
The findings in the start phase of oxidation discoloration and heat discoloration are similar. A thorough
investigation and compliance with the above evaluation criteria allow an unambiguous evaluation. To
avoid unnecessary disassembly work, it is recommended that another inspection be carried out after
further operation of the engine.
168 | Task Description | MS150068/01E 2014-01