# Service bulletin TSB260114

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: 11036013
- Published by NHTSA: 2026\-08\-07
- Manufacturer's number: TSB260114
- Manufacturer's date: 2026\-07\-28
- NHTSA component: ENGINE

## NHTSA's summary

This Technical Service Bulletin describes the verification and resolution steps for the water manifold connection of certain X12 engines in MCI motor coach applications which may be out of specification, resulting in an external coolant leak.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2026/MC-11036013-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2026/MC-11036013-9999.pdf)

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

## Components

Engine

## Vehicles listed

- CUMMINS X12

JSON: [/v1/bulletins/11036013](/v1/bulletins/11036013)

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