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Service bulletin C2079

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 id10145447
Published by NHTSA2018-10-15
Manufacturer's numberC2079
Manufacturer's date2017-09-25
NHTSA componentENGINE AND ENGINE COOLING

NHTSA's summary

This campaign is being issued to replace ISL G CM2180 engine piston rings and Exhaust Gas Recirculation (EGR) cooler in certain transit buses with factory installed steel pistons that may result in increased oil consumption. This campaign authorizes the repair location to replace the piston ring sets, clean the pistons, and replace the EGR cooler.

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 ISL G

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