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Service bulletin 98C1

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 id601761
Published by NHTSA1998-08-24
Manufacturer's number98C1
Manufacturer's date1998-05-18
NHTSA componentENGINE AND ENGINE COOLING:ENGINE

NHTSA's summary

INCORRECT INJECTION TIMING AND BLOWER DRIVE RATIO. *YC ALL MODELS EQUIPPED WITH SERIES 92 ENGINES

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
DETROIT DIESEL DETROIT

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