WenmarOpen by Wenmar Pro

Service bulletin FSB 211-001

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 id10110369
Published by NHTSA2017-08-04
Manufacturer's numberFSB 211-001
Manufacturer's date2017-02-10
NHTSA componentEQUIPMENT:MECHANICAL; ENGINE AND ENGINE COOLING

NHTSA's summary

Lower Valve Cover Crush Sleeve, Installation, During removal and installation of the two-piece valve cover assembly, pay close attention to ensure the all of the crush sleeve are properly installed in the lower valve cover. The crush sleeves can be pulled from the lower valve cover and fall into the gear train causing serious engine damage.

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, Equipment and accessories

Vehicles listed
MACK CHU2016 to 2018
MACK CXU2016 to 2018
MACK GU2016 to 2018

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