ISL/QSL and ISC/QSC External Oil Leaks From Oil Pan and Oil Pan Gasket

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Technical Service Bulletin Number
TSB140061

Technical Service Bulletin

Subject
ISL/QSL and ISC/QSC External Oil Leaks From Oil Pan and Oil Pan Gasket

Issue
The ISC/QSC CM850/CM2150/CM2250/CM2350, ISL G CM2180, and ISL/QSL
CM850/CM2150/CM2250/CM2350 product lines offer multiple lubricating oil pan options that
vary the orientation and mounting hardware. The lubricating oil pan option is selected by the
original equipment manufacturer (OEM) based upon the application needs. Lubricating oil pan
options, which include the block stiffener plate, may provide additional robustness in high duty
cycle applications, or applications where the chassis and powertrain is subjected to elevated
levels of bending and twisting.

Verification
Repeated external oil leaks from the lubricating oil pan and lubricating oil pan gasket for the
same engine serial number (ESN), or multiple ESNs in the same application and operating
environment with complaints of an external oil leak from the lubricating oil pan and lubricating
oil pan gasket.

Resolution
The installation of the block stiffener plate, Part Number 3927606, may reduce instances of the
lubricating oil pan leaking and cracking on ISL/QSL and ISC/QSC engines. There may be
some variation between the required parts, depending on the original lubricating oil pan option.
It is the responsibility of the repair location to make sure that the proper parts are installed and
the lubricating oil pan (OP) option is correctly updated on QuickServe® Online. Contact a
Cummins® Authorized Repair Location or Cummins® Distributor for a list of oil pan options.
Note that oil pan options which use a sealant between the block and block stiffener have been

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ISL/QSL and ISC/QSC External Oil Leaks From Oil Pan and Oil Pan Gasket

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obsoleted. When installing the block stiffener, edge molded gasket, Part Number 3930408,
must be installed between the block and the block stiffener. For additional support, contact a
Cummins® Authorized Repair Location or Cummins® Distributor.
Table 1 provides a list of additional parts that are needed for installation of the block
stiffener. Installation of the block stiffener adds 1 quart of capacity to the lubricating oil pan.
Dipstick recalibration is recommended, but not required.
Table 1, Additional Parts Needed for Block Stiffener Upfit
Part
Number

Part Name

Quantity

3927606

Plate, Stiffener

1

Block stiffener.

3930408

Edge Molded Gasket

1

Gasket between block and block stiffener
plate.

3902114

Lubricating Oil Pan
Capscrew

32

Longer capscrew needed with addition of
stiffener plate.

3928737

Suction Tube Brace

1

Tube brace with spacers for stiffener.

3901865

Suction Tube Brace
Capscrews

2

For new tube brace.

Notes

For installation instructions, reference the appropriate sections and procedures of the Service
Manual or Troubleshooting and Repair Manual for the engine being serviced:




Procedure 001-089 (Block Stiffener Plate) in Section 1.
Procedure 007-025 (Lubricating Oil Pan) in Section 7.
Procedure 007-035 (Lubricating Oil Suction Tube) in Section 7.

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.

Document History
Date
2014-5-14
2016-4-18
2016-7-13

Details
Module Created
Added ISL G CM2180
Corrected spelling error.

Last Modified: 13-Jul-2016
Copyright © 2000-2010 Cummins Inc. All rights reserved.

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8/1/2016