# Service bulletin TSB210204\-051420

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: 10198485
- Published by NHTSA: 2021\-06\-28
- Manufacturer's number: TSB210204\-051420
- Manufacturer's date: 2021\-05\-14
- NHTSA component: ENGINE

## NHTSA's summary

This Technical Service Bulletin describes the verification and resolution of an external lubricating oil leak from the crankcase breather tube. This can be caused by debris from valve cover manufacturing process can plug the lubricating oil separator breather system, preventing lubricating oil from draining back to the crankcase.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2021/MC-10198485-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2021/MC-10198485-9999.pdf)

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

## Components

Engine

## Vehicles listed

- CUMMINS L9

JSON: [/v1/bulletins/10198485](/v1/bulletins/10198485)

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