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Service bulletin 98WS001

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 id602012
Published by NHTSA1998-09-02
Manufacturer's number98WS001
Manufacturer's date1998-04-17
NHTSA componentENGINE AND ENGINE COOLING:ENGINE:GASOLINE

NHTSA's summary

SUBJECT REGARDING 1998 CATERPILLAR 3406E ENGINES WITH J . JEB BLOCK HEATERS. *YC

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
WESTERN STAR WESTERN STAR1998

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