The defect
Mack Trucks, Inc. (Mack) is recalling certain model year 2011-2016 Mack MRU and LEU trucks manufactured June 25, 2010, to April 30, 2015, and 2015-2016 LR6 trucks manufactured from December 18, 2014 through March 6, 2015. Excessive engine crankcase pressures may cause the 90-degree elbow of the vent tube assembly to detach from the crankcase ventilation breather, possibly allowing engine oil to come into contact with hot surfaces.
The risk
If engine oil comes into contact with a hot surface, there could be an increased risk of a fire.
The remedy
Cummins will notify owners on behalf of Mack, and Cummins service centers will administer the repairs which include securing the ends of the 90-degree elbow and reprogramming the electronic control module (ECM) with software that can adjust the engine output under misfire conditions to limit crankcase pressures. These repairs will be performed free of charge. The recall began on June 12, 2015. Owners may contact Mack customer service at 1-800-528-6586 or Cummins Inc. at 1-800-343-7357. Mack's number for this recall is SC0391.
NHTSA's own wording · initiated by MFR
Vehicles covered
| Model | Model years |
|---|---|
| Mack LEU | 2011, 2012, 2013, 2014, 2015, 2016 |
| Mack LR6 | 2015, 2016 |
| Mack MRU | 2011, 2012, 2013, 2014, 2015, 2016 |
Components: ENGINE AND ENGINE COOLING:ENGINE
Model years in this recall
NHTSA complaints and the number of recall campaigns for each model year this recall covers.
| Model | Year | Complaints | Recalls |
|---|---|---|---|
| Mack LEU | 2011 | 0 | 8 |
| Mack LEU | 2012 | 0 | 8 |
| Mack LEU | 2013 | 0 | 6 |
| Mack LEU | 2014 | 0 | 6 |
| Mack LEU | 2015 | 0 | 5 |
| Mack LEU | 2016 | 0 | 2 |
| Mack LR6 | 2015 | 0 | 1 |
| Mack LR6 | 2016 | 0 | 1 |
| Mack MRU | 2011 | 0 | 10 |
| Mack MRU | 2012 | 0 | 9 |
| Mack MRU | 2013 | 0 | 6 |
| Mack MRU | 2014 | 0 | 7 |
| Mack MRU | 2015 | 0 | 3 |
| Mack MRU | 2016 | 0 | 2 |
Other engine and engine cooling recalls in 2015
53 of the 863 recall campaigns reported to NHTSA in 2015 concerned the engine and engine cooling; Mack Trucks, Inc. filed 118 campaigns in all.
| 15V852000 18 Dec 2015 | Suzuki Motor of America, Inc. |
| 15V816000 7 Dec 2015 | Daimler Trucks North America LLC |
| 15V755000 16 Nov 2015 | Navistar, Inc. |
| 15V752000 13 Nov 2015 | Newmar Corporation |
| 15V705000 26 Oct 2015 | Volkswagen Group of America, Inc. |
| 15V701000 26 Oct 2015 | General Motors LLC |
| 15V702000 26 Oct 2015 | Mack Trucks, Inc. |
| 15V676000 19 Oct 2015 | Chrysler (FCA US LLC) |
NHTSA recalls (public domain) · all recalls of 2015