WenmarOpen by Wenmar Pro

Service bulletin 133

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 id10020429
Published by NHTSA2006-10-02
Manufacturer's number133
Manufacturer's date2007-01-01
NHTSA componentENGINE AND ENGINE COOLING:ENGINE

NHTSA's summary

INCORRECT CAT C15 AIR COMPRESSOR DISCHARGE LINE FITTING. MODEL CONSTELLATION. THE TWO PIECE DISCHARGE LINE FITTING ON SOME BENDIX BA-921 AIR COMPRESSORS USED ON CAT C15 ENGINES MAY VIBRATE LOOSE CAUSING AN AIR LEAK AT THE CYLINDER HEAD. WESTERN STAR. *KB UPDATED ON 09/27/07. *NJ

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
UNKNOWN UNKNOWN

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