Signature™, QSX, and ISX CM570/CM870/CM871/CM2250 Replacement Cylinder Lin... Page 1 of 3

Technical Service
Bulletin Number
TSB110277

Revision Level

Date

Group Number

Technical Service Bulletin

Subject
Signature™, QSX, and ISX CM570/CM870/CM871/CM2250 Replacement Cylinder Liner Compatibility

Issue
In January of 2010, a new cylinder block and cylinder liner were introduced for production and service for
all 15 liter engines. The new cylinder block was designed to be backward compatible with previous 15
liter engines for service repairs. The cylinder liner design is not cross-compatible between cylinder block
designs. There is the potential that QuickServe™ Online will list incorrect cylinder block and cylinder liner
part numbers for the engine.
Implementation of the new cylinder block was performed in phases at the Jamestown Engine Plant (JEP).
Because of the implementation schedule, the new engine could be built with either a small bore diameter
cylinder block and cylinder liner, or a large bore diameter cylinder block and cylinder liner.
Any Signature™, QSX, and ISX CM570/CM870/CM871 engines that have had a cylinder block kit,
ReCon® short-block, ReCon® long-block, or ReCon® engine replaced after January 1st, 2010, could
potentially have been built with either a small bore diameter cylinder block and cylinder liner, or a large
bore diameter cylinder block and cylinder liner.

Verification
Before replacing a flat top designed cylinder liner, verify the size of the cylinder liner presently installed on
the engine. The correct cylinder liner can be determined by measuring the outside diameter of the
cylinder liner at the cylinder liner o-ring packing area. For a groove top design cylinder liner, the
verification is not needed when replacing a groove top cylinder liner with another groove top cylinder
liner. See Figure 1 for the location where the measurement is to be taken.

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Figure 1, Location of Measurement
NOTE: A small outside diameter cylinder liner will visually appear to have been correctly installed
into a large bore cylinder block. However, because of the smaller outside diameter of the cylinder
liner, it will fit loosely into the cylinder block at the cylinder liner o-ring sealing area. This will
create a potential issue of excessive cylinder liner movement in the cylinder block.

Resolution
Once the size of the cylinder liner has been determined, refer to the table below for the correct cylinder
liner part number.
Cylinder Liner and Kit Part Number
Liner Outside Diameter (OD)

Cylinder Liner

Cylinder Liner Kit

150 mm [5.906 in]

4311632

4311633

152 mm [5.984 in]

3685235

2881719

NOTE: All ISX engine configurations have overhaul kits available with the standard 150 mm [5.906
in] cylinder liners. If the measurement of the cylinder liner at the mid-stop indicates an oversized,
152 mm [5.984 in] cylinder liner is needed, please reference this ISX Overhaul Kit Quick Reference
Guide to help you determine the appropriate kit part number to order:
https://quickserve.cummins.com/common/files/qsol/cms/isx_cpls_piston_overhaul_cross_ref.pdf
For engines that do not have an overhaul kit released with the oversized 152 mm [5,984 in] cylinder
liners, please order the cylinder liners separately to complete the repair.
For Signature™, ISX, and QSX15 CM570/CM870/CM871 engines, use the following procedure for
cylinder liner installation in the Signature, ISX, and QSX15 Service Manual, Bulletin 3666239. Refer to
Procedure 001-028 in Section 1.
For ISX CM2250 engines, use the following procedure for cylinder liner installation in the ISX CM2250
Service Manual, Bulletin 4022250. Refer to Procedure 001-028 in Section 1.

Warranty Statement

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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
2011-9-30
2011-12-2
2012-4-13
2012-8-29
2014-3-7

Details
Module Created
The effected population has expanded and improved the wording to more easily
understand what the issue is.
Due to changes made to the cylinder block the verification process was no longer valid
and a new verification neede to be added.
To include new liner part number and clarity on possible suspended engines.
Add information on overhaul kits

Last Modified: 12-Mar-2014
Copyright © 2000-2010 Cummins Inc. All rights reserved.

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