WenmarOpen by Wenmar Pro

Service bulletin WC-C1387

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 id10053505
Published by NHTSA2013-11-05
Manufacturer's numberWC-C1387
Manufacturer's date2013-08-02
NHTSA componentENGINE

NHTSA's summary

CUMMINS: ISL9 AFTERTREATMENT SYSTEMS THAT LEAD TO FAILED DEF DOSING VALVES IN TRANSIT APPLICATIONS, IS BY REROUTING OF COOLANT LINES TO DOSING VALVE HAS BEEN DETERMINED TO REDUCE FC 3569. MODEL ISL, ISLE3, QSL9. NO MODEL YEARS LISTED. *PE

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 CUMMINS
CUMMINS ISL

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