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Service bulletin TIB-E-055

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 id10045240
Published by NHTSA2012-08-22
Manufacturer's numberTIB-E-055
Manufacturer's date2012-07-09
NHTSA componentENGINE AND ENGINE COOLING:ENGINE:GASOLINE:TURBO/SUPERCHARGER

NHTSA's summary

KENWORTH: OIL COLLECTION AT CAC INTAKE PIPE IS CAUSED BY AN IMBALANCE IN TURBOCHARGER PRESSURES. MODELS T660, T800, T700, AND W900. *PE

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, Turbocharger or supercharger

Vehicles listed
KENWORTH T6602002 to 2012
KENWORTH T7002007 to 2012
KENWORTH T8001994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005
KENWORTH T8002006 to 2012
KENWORTH W9001994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005
KENWORTH W9002006 to 2012

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

Other bulletins for the same vehicles and component
TIB-41-122009-01-29. Service bulletin. KENWORTH TRUCKS: THE INLET PIPE CONNECTIONS FOR ISX ENGINES. THE KENWORTH AIR INLET PIPE TO THE ISX TURBO MAY BECOME DETACHED. CHASSIS AFFECTED T2000, T800, AND W900. MODEL YEARS UNKNOWN. *PE