WenmarOpen by Wenmar Pro

Service bulletin T2387A

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 id10193398
Published by NHTSA2021-05-17
Manufacturer's numberT2387A
Manufacturer's date2021-04-13
NHTSA componentPOWER TRAIN

NHTSA's summary

This Temporary Repair Practice is being issued to provide supporting coverage for progressive damage on certain B Series engines due to valve spring failures. This is an update to a previously submitted communication.

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

Transmission and driveline

Vehicles listed
CUMMINS ISB6.7

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