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Service bulletin ATC2163

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

The communication, as NHTSA indexes it (as of 2026-10-19)
TypeService bulletin
NHTSA id10168148
Published by NHTSA2019-11-25
Manufacturer's numberATC2163
Manufacturer's date2019-10-08
NHTSA componentENGINE AND ENGINE COOLING

NHTSA's summary

This Account Team Coverage is being issued to address life cylinder liner O-ring failures (PN 3696801) in certain X12 CM2350 X119B engines. Normal temperature at the liner may result in liner O-ring deterioration causing an external coolant leak. This field action provides authorization for certified repair locations to replace the cylinder liner O-rings with new O-rings that have increased temperature capability and margin for potential longer-term durability.

The document

The document is the manufacturer's. This site does not hold it. NHTSA files a document at one of these two addresses; we have not asked NHTSA which.

Components

Engine

Vehicles listed
CUMMINS X12

Listing a model year does not mean every vehicle of it is concerned: the document says which.