# Service bulletin MDH020321

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: 10057948
- Published by NHTSA: 2015\-07\-16
- Manufacturer's number: MDH020321
- Manufacturer's date: 2015\-03\-01
- NHTSA component: ENGINE AND ENGINE COOLING:COOLING SYSTEM:HOSES/LINES/PIPING/FITTINGS

## NHTSA's summary

THIS TSB CONTAINS AN OWNER NOTIFICATION LETTER. SEE DOCUMENT SEARCH BUTTON FOR OWNERS LETTER. FIAT CHRYSLER 2011\-2012 RAM TRUCK CAB CHASSIS \(3500 SERIES\), \(4500/5500 SERIES\). THE COOLANT HOSE BUNDLES FOR THE DEF AND ALL HOSE CLAMPS RELATED MUST BE REPLACED. \*LJ

## 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, Cooling system

## Vehicles listed

- 2011 to 2012 DODGE RAM 3500
- 2011 to 2012 DODGE RAM 4500
- 2011 to 2012 DODGE RAM 5500

## Other bulletins for the same vehicles and component

- [05191925A](/bulletins/10149006.md), 2018-11-26, Service bulletin: ENGINE AND ENGINE COOLING:COOLING SYSTEM:RADIATOR ASSEMBLY. Radiator If vehicle comes in for transmission fluid leaking from trans\-oil cooler fittings on the radiator, please check the following before replacing the radiator/cooler:\~ 1. Remove both of the transmission lines from the cooler?s top/bottom flared fittings on the radiator. \~ 2. Loosen the hex nut on the top flared fitting on the radiator tank.\~ 3. Torque the top flared fitting to 235 \+/\- 15 Lb\-In.\~ 4. Torque hex nut to 100 \+/\- 10 Lb\-In.\~ 5. Repeat for bottom flared fitting.\~ 6. Reinstall transmission line per normal installation procedures and ensure correct fluid level.\~ \~ If vehicle is in need of a new radiator for another reason, check the new radiator for correct torque on the trans\-oil cooler fitting per steps 2\-5 above.\~ \~ If radiator has a yellow mark by the trans\-oil cooler fittings the torque does not have to be checked.

JSON: [/v1/bulletins/10057948](/v1/bulletins/10057948)

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