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Service bulletin 18631

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 id10020434
Published by NHTSA2006-10-04
Manufacturer's number18631
NHTSA componentENGINE AND ENGINE COOLING:ENGINE

NHTSA's summary

MBE 4000 OIL GALLERY THREADED PLUG INSTALLATION. NEW SERVICE KIT IS AVAILABLE TO INSTALL TWO THREADED PLUGS IN PLACE OF CUP PLUGS IN THE REAR OIL GALLERY ON MBE 4000 ENGINES. DETROIT DIESEL. *KB

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.