# Service bulletin FSB 257\-003

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: 10083507
- Published by NHTSA: 2016\-10\-25
- Manufacturer's number: FSB 257\-003
- Manufacturer's date: 2015\-10\-30
- NHTSA component: ENGINE AND ENGINE COOLING:COOLING SYSTEM; ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL:CRANKCASE \(PCV\)

## NHTSA's summary

CRANKCASE VENTILATION TUBE HEATER. FOR CUSTOMER OPERATING VEHICLES IN EXTREME COLD TEMPERATURES, MACK TRUCKS HAS DEVELOPED A DEVICE THAT WILL PREVENT THE CRANKCASE VENTILATION \(CCV\) TUBE FROM BUILDING UP ICE AND FREEZING OVER WHICH COULD LEAD TO ENGINE DAMAGE.

## 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, Exhaust and emissions, Cooling system, Crankcase ventilation \(PCV\)

## Vehicles listed

- MACK MACK

JSON: [/v1/bulletins/10083507](/v1/bulletins/10083507)

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