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Service bulletin 9629B

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 id52403
Published by NHTSA1997-07-24
Manufacturer's number9629B
Manufacturer's date1997-03-13
Replaces9629-A
NHTSA componentENGINE AND ENGINE COOLING:ENGINE

NHTSA's summary

INTERNAL COOLANT LEAKAGE FROM HEAD GASKETS. *TW

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
CUMMINS CUMMINS1994 to 1995

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