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Service bulletin T1612C

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 id10082052
Published by NHTSA2016-10-12
Manufacturer's numberT1612C
Manufacturer's date2016-02-23
NHTSA componentENGINE

NHTSA's summary

THIS TEMPORARY REPAIR PRACTICE IS BEING ISSUED TO ADDDRESS PLUGGING OF EGR COOLERS AND EGR VALVES RESULTING IN FC1896 AND/OR FC3382 ON CERTAIN ISL ENGINES IN TRANSIT BUS APPLICATIONS. THIS TRP AUTHORIZES THE REPLACEMENT OF PISTONS AND VALVE STEM SEALS, AND IF REQUIRED, UPDATING THE ECM CALIBRATION. THIS IS AN UPDATE TO A PREVIOUSLY RELEASED COMMUNICATION.

The document

No address for NHTSA's copy can be built for this communication. Ask the dealer for it by the manufacturer's number.

Components

Engine

Vehicles listed
CUMMINS ISL9

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