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Service bulletin E284

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 id10206081
Published by NHTSA2022-01-06
Manufacturer's numberE284
Manufacturer's date2021-12-17
NHTSA componentENGINE AND ENGINE COOLING

NHTSA's summary

Information Only: Whenever a cylinder head is removed, a service cylinder head gasket must be installed. The production cylinder head gasket included with cylinder head installation kits should be discarded.

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

Vehicles listed
PACCAR MX-112013 to 2017
PACCAR MX-132013 to 2017

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