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Service bulletin TSB170030-031520

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 id10110314
Published by NHTSA2017-08-04
Manufacturer's numberTSB170030-031520
Manufacturer's date2017-03-15
NHTSA componentENGINE AND ENGINE COOLING:COOLING SYSTEM

NHTSA's summary

This Technical Service Bulletin describes the verification and resolution of coolant leaks at the coolant thermostat housing or malfunction of coolant thermostat which requires replacement of coolant thermostat. A new coolant thermostat with a more robust o-ring has been released.

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, Cooling system

Vehicles listed
CUMMINS ISL G

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