TSB200110-051320

5/28/2020
Lubricating Oil Consumption in Low Load and High Idle Application
Technical Service Bulletin
Technical Service Bulletin: TSB200110
Released Date: 13-May-2020
Lubricating Oil Consumption in Low Load and High Idle Application
Lubricating Oil Consumption in Low Load and High
Idle Application
Warranty Statement
The information in this document has no effect on present warranty coverage or repair practices,
nor does it authorize TRP or Campaign actions.
Contents
Product Affected
Engines:
L9N CM2380 L124B
L9N CM2380 L130B
ISL G CM2180 (Only engines equipped with steel pistons)
Application:
Transit bus 280 hp
Issue
Engines operating in a low load and high idle duty cycle may experience elevated lubricating oil
consumption and/or fault codes associated with high EGR temperature. Review of returned parts
has yielded no physical damage or dimensional issues. Furthermore, replacing power cylinders or
overhauling with new parts, without any change in duty cycle, has shown no long-term
improvement in lubricating oil consumption.
Root Cause
Under investigation.
Verification
Confirm that any of the following fault codes are present:
High EGR Temperature Fault Codes:
2961: Exhaust Gas Recirculation Temperature - Data Valid But Above Normal
Operating Range - Least Severe Level
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Lubricating Oil Consumption in Low Load and High Idle Application
2962: Exhaust Gas Recirculation Temperature - Data Valid But Above Normal
Operating Range - Moderately Severe Level
Verify oil consumption is greater than the amount outlined in “Lubricating Oil Consumption and
Acceptable Limits”, Service Bulletin 3379214
Verify the EGR cooler is fouled or plugged
Resolution
Reduce idle time as much as possible.
If the EGR cooler is fouled or plugged clean the EGR cooler as described in Service
Procedure 011-019 EGR Cooler in Section 11.
Service Instructions
Follow Clean and Inspect for Reuse section in 011-019 EGR Cooler in Section 11 of the
Service Manual.
Use a degreaser in place of safety solvent, and soak for an additional 30 minutes to an hour
total.
Steam clean EGR cooler and reuse.
Publications Affected
Table 1, Products Affected
Manual Type
Engine
Bulletin Number
Fault Code /
Symptom
Fault Code
Troubleshooting
Manual
L9N CM2380 L124B
5467495
2961, 2962
Fault Code
Troubleshooting
Manual
L9N CM2380 L124B
5467495
Lubricating Oil
Consumption
Fault Code
Troubleshooting
Manual
L9N CM2380 L130B
5613179
2961, 2962
Fault Code
Troubleshooting
Manual
L9N CM2380 L130B
5613179
Lubricating Oil
Consumption
Fault Code
Troubleshooting
Manual
ISL G CM2180
4021658
2961, 2962
Fault Code
Troubleshooting
Manual
ISL G CM2180
4021658
Lubricating Oil
Consumption
Document History
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Lubricating Oil Consumption in Low Load and High Idle Application
Date
2020-5-12
Details
Module Created
Last Modified: 13-May-2020
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