# Service bulletin CMI\-S5T7S\-11

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: 10183110
- Published by NHTSA: 2020\-11\-30
- Manufacturer's number: CMI\-S5T7S\-11
- Manufacturer's date: 2020\-10\-22
- NHTSA component: EQUIPMENT ADAPTIVE/MOBILITY; EQUIPMENT; ENGINE AND ENGINE COOLING:COOLING SYSTEM

## NHTSA's summary

These are representative communications from the Cummins producing plant to affected vehicle manfacturers regarding a potential valve spring issue on certain B6.7 engines. A supplier potential manufacturing defect may cause these valve springs to fail while in service. The engine plant initiated corrective action with affected OEMs.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2020/MC-10183110-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2020/MC-10183110-9999.pdf)

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

## Components

Engine, Equipment and accessories, Cooling system

## Vehicles listed

- CUMMINS B6.7

JSON: [/v1/bulletins/10183110](/v1/bulletins/10183110)

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