NHTSA ID Number: 10052639
Manufacturer Communication Number: IK-1200656
TSB/Document Date: 2013-08-27
Summary
IKNOW: THE TURBOCHARGER ON SOME VEHICLES MAY HAVE SOOT BUILT UP ON THE IMPELLER DUE TO OIL CARRY OVER IN THE INTAKE SYSTEM. AS A RESULT, THERE MAY BE LOW POWER DUE TO LOW BOOST PRESSURE. THIS BULLETIN APPLIES TO I6 MAXXFORCE ENGINES DT, 9, AND 10.*JS
IK1200656 - Turbocharger Coking: How to Clean
Page 1 of 2
SB-10052639-8134
Countries:
CANADA, UNITED STATES Document ID: IK1200656
Availability:
ISIS, Bus ISIS, FleetISIS
Revision :
7
Major System:
ENGINES
Created:
10/7/2011
Current Language: English
Last Modified: 7/10/2013
Other Languages: Français, Español,
Author:
Viewed:
Gregory Stone
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Title: Turbocharger Coking: How to Clean
Applies To: 2010 I6 MaxxForce Engines DT, 9, and 10 - ESN 3300000 through 3999999
DESCRIPTION
Turbocharger has soot built up on the impeller. The main cause of this condition is oil carry over in the intake system. Medium to light coking does NOT affect
engine performance.
SYMPTOMS
Low power due to low boost pressure
TROUBLESHOOTING
1. Remove intake piping attached to turbos.
2. Inspect for coking (Figure 1).
Figure 1:
Two examples of turbo coking. Both cases caused low boost pressure and
resulted in frequent regens.
RESOLUTION
If coking is found:
1. Use the NEW I334 turbo cleaning kit P/N 7091592C91 to clean turbocharger.
- DO NOT remove Turbochargers
- Follow procedure included in the: turbo cleaning kit instructions
2. Diagnose root cause of coking. Inspect for the following conditions:
• Oil breather for proper operation See IK1200914
• Excessive Crankcase pressure
• Excessive idling operation
• Engine running poorly
• Air Cleaner restriction
• Use test equipment ZTSE-4341 to perform the air leak test
4. Diagnosing Turbocharger Oil Discharge:
• iKNow articles: IK1200535
• Check ITV for proper operation: iKNow article: IK1200466
5. Boost leaks:
• Include CAC pressure test per s12006
• Reference Low Power due to low boost: iKNow article IK1200648
https://evalue.internationaldelivers.com/service_kb/DocTool/ArticleViewer.aspx?ControlID... 8/2/2013
IK1200656 - Turbocharger Coking: How to Clean
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Turbo replacement is only required with the following conditions:
1. Turbo does not spin freely (some contributing conditions):
• Excessive coking behind compressor wheel
• Excessive axial play causing contact with the housing
• Fin / housing interference (metal to metal)
• Any foreign object damage to the compressor wheel
- During cleaning, interference is identified during housing inspection
2. Turbo Oil discharge:
- Turbocharger Oil Discharge Diagnostic Tree (click on links below):
• Diagnosing Turbocharger Oil Discharge From the Compressor Outlet
• Diagnosing Turbocharger Oil Discharge From the Turbine Outlet
FINAL STEPS
After any exhaust or intake system repair, the following steps must be completed:
1. Mass Air Flow (MAF) calibration.
2. On Board Filter Cleanliness Test (OBFCT).
3. 0-60 mph Performance test and snapshot to confirm EBP and Boost meet specifications per EGES 455.
NOTE:
It is best to record OBFCT and 0-60 mph with snapshots in case it becomes necessary to review with I6 Tech Service.
This new cleaning process will, in most cases, eliminate the need for complete turbocharger replacement related to low power complaints.
Turbochargers that DO NOT meet the above replacement criteria, and have been replaced under warranty, will no longer be supported.
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Copyright © 2013 Navistar
, Inc.
https://evalue.internationaldelivers.com/service_kb/DocTool/ArticleViewer.aspx?ControlID... 8/2/2013
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TSB/Document ID: IK-1200656
Replacement Service Bulletin Number:
MFR Communication Date: 2013-07-10
MFR Internal Campaign ID/Software Version:
Communication Type: Service Bulletin/Repair Instructions
NHTSA Components: ENGINE AND ENGINE COOLING:ENGINE:GASOLINE:TURBO/SUPERCHARGER
MFR Component System:
MFR Component Subsystem:
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