04101-ZV7-505ZA Honda SEE PART DETAILS - PRI; CYLINDER HEAD *NH8* (DARK GRAY)

Do not operate or work on this product unless you have read and understood the instruction and warnings in the relevant Operation and Maintenance Manuals and relevant service literature. Failure to follow the instructions or heed the warnings could result in injury or death. Proper care is your responsibility.
There have been some instances of oil leaking from the turbocharger into the aftertreatment.The oil is most likely to be coming from the turbocharger. Oil leakage alone does not mean that there is an issue with the turbocharger.If any of the following conditions exist, the turbocharger does not create much boost pressure:
The engine is allowed to idle for long periods of time
The application has only carried out light load dutiesBoost pressure assists the turbocharger oil seals and helps to keep the oil from entering the inlet side of the turbocharger.
Illustration 1 g06527946
Typical example that shows oil film on inlet side of turbocharger
Illustration 2 g06527956
Typical example that shows oil film on inlet side of turbocharger
If there is no boost pressure, then oil can sometimes leak past the seals into the inlet side of the turbocharger. Refer to Illustration 1 and Illustration 2.If there is an oil leak from any of the hoses between the turbocharger and inlet manifold, and there are no other problems with the turbocharger, the turbocharger does not necessarily have an issue.Do not replace the turbocharger if you are only seeing oil leaking at any of the hoses between the turbocharger and the inlet manifold.
Illustration 3 g06528019
Typical example that shows that oil film is dispersed as a result of 15 minutes of engine operation at full load
Illustration 4 g06528027
Typical example that shows that oil film is dispersed as a result of 15 minutes of engine operation at full load
To remove the oil, the application should be operated at full load for 15 minutes. The operation of the application causes the turbocharger to generate boost pressure. The generation of boost pressure will quickly disperse the oil from the turbocharger and air pipes. The generation of boost pressure will clear any signs of oil leakage, where the oil will be burnt in the cylinder during the combustion process. Refer to Illustration 3 and Illustration 4. Once completed, any external oil can be cleaned off the inlet hoses and tubes.Note: If the application is again allowed to run at low idle for long periods of time, or the application is only carrying out light load duties, then the oil leakage will return again. This condition is normal.Turbochargers that have suffered other issues will not create the correct boost pressure, may be noisy, or may have excessive movement between the shaft and bearings. This movement maycause contactbetween the impeller or the turbine and the housing. There may also be oil leakage, but the oil leakage will be excessive and will not clear when the above procedure is completed.Oil leakage accompanied by low power may be a symptom of applications that have been allowed to run at low idle for a long time period.Troubleshooting procedures related to the turbocharger have been updated to try to eliminate unnecessary turbocharger replacements.