# Service bulletin TSB230058\-031620

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.

- Type: Service bulletin
- NHTSA id: 10233714
- Published by NHTSA: 2023\-04\-05
- Manufacturer's number: TSB230058\-031620
- Manufacturer's date: 2023\-03\-21
- NHTSA component: ENGINE AND ENGINE COOLING

## NHTSA's summary

This Technical Service Bulletin announces introduction of new Valve Seat Guide no. 6381879 and supersedes the old part no. 3906206.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2023/MC-10233714-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2023/MC-10233714-9999.pdf)

The document is the manufacturer's. This site does not hold it.

## Components

Engine

## Vehicles listed

- CUMMINS B5.9
- CUMMINS ISB

JSON: [/v1/bulletins/10233714](/v1/bulletins/10233714)

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