Nissan’s Variable-Compression Engine Issues Under Federal Investigation
Introduction
Nissan’s once-acclaimed variable-compression turbo engines have come under the radar of the National Highway Traffic Safety Administration (NHTSA) due to reported problems. These engines, the 1.5-liter three-cylinder, and the 2.0-liter four-cylinder, are present in popular models like the Nissan Rogue, Nissan Altima, and Infiniti QX50.
The Investigation
The NHTSA is investigating over 450,000 vehicles equipped with these engines following complaints of knocking sounds, power loss, metal contamination in oil pans, and instances of total engine failures. Although Nissan has made modifications to address potential engine damage, including changes to the engines’ main bearings and L-links, no official recall has been announced yet.
The Concern
While the exact cause of these issues is yet to be determined, the focus is on Nissan’s unique variable compression technology that allows adjusting the piston’s top-dead-center and bottom-dead-center positions to optimize power and efficiency. These engines were initially lauded for this very technology, earning spots on prestigious lists such as Wards’ 10 Best Engines.
Conclusion
The NHTSA’s investigation remains ongoing, and pending findings might lead to a recall in the future. Stay tuned for updates as the situation unfolds.
FAQ
Q: Which Nissan models are affected by the variable-compression engine issues?
A: The Nissan Rogue, Nissan Altima, and Infiniti QX50 are among the models under investigation.
Q: What are some reported problems with these engines?
A: Owners have reported issues like knocking sounds, power loss, metal contamination in oil pans, and total engine failures.
Q: Has Nissan issued a recall for these engines?
A: Despite implementing modifications, no official recall has been announced yet.
Q: What makes Nissan’s variable compression technology unique?
A: This technology allows for adjusting the piston’s positions to maximize both power and efficiency, distinguishing it from traditional engine designs.