Is the 2012 5.7 HEMI a good engine?
Yes. The 2012 5.7 HEMI is generally considered a solid, reliable V8 with strong low-end torque and broad capability, though it isn’t immune to age-related wear or fuel economy penalties as mileage climbs.
What makes the 5.7 HEMI appealing
The 5.7-liter HEMI V8, used across Dodge, Ram, and Chrysler models, has a long-standing reputation for durability, muscular torque, and straightforward maintenance. In 2012, the engine carried over a design that emphasizes power delivery at low RPMs, good towing ability, and parts availability that make upkeep feasible for both daily drivers and weekend tow rigs.
- Strong low-to-mid range torque suitable for towing and acceleration from city speeds.
- Relatively simple, well-understood architecture with widely available parts and service knowledge.
- Good compatibility with a range of transmissions used in Ram, Charger, and Challenger applications.
- Distinctively robust engine note and confidence in long-term durability when properly maintained.
Key strengths include a strong torque curve, robust construction, and broad aftermarket support, which can help with repairs, upgrades, and reliability monitoring.
Overall, these attributes tend to translate into a favorable ownership experience for many drivers, provided routine maintenance is observed and issues are addressed promptly.
Reliability, maintenance needs, and potential drawbacks
Like any aging internal-combustion engine, the 2012 5.7 HEMI can deliver excellent service when cared for, but owners should be aware of common trouble spots and routine maintenance needs that can affect longevity and ownership costs.
- MDS and Variable Valve Timing-related quirks, which can cause rough idle or intermittent deactivation-related noises in some vehicles, particularly at light load or during start-stop cycles.
- Exhaust manifold bolts and gaskets can develop leaks as the vehicle ages, potentially requiring inspection and replacement of fasteners or gaskets.
- Oil consumption and oil leaks can appear in higher-mileage examples; regular oil level checks and timely oil changes are important.
- Timing chain/tensioner wear is a wear point to monitor, especially as the engine accumulates high mileage, though failures are not universal.
- Transmission coupling and torque-converter behavior in the paired automatics (such as the older 5- or 6-speed automatics used with the 5.7) can manifest as delayed shifts or shudder if fluid changes are neglected.
- Fuel economy is typically lower than modern small-blocks, reflecting its displacement and design; real-world numbers vary with vehicle weight, drivetrain, and driving style.
Common considerations for this era of HEMI include:
Careful maintenance—oil changes with the correct viscosity, timely coolant and transmission service, and attention to any vibration, noise, or shifting irregularities—helps maximize reliability and longevity.
What to consider when buying a used 2012 5.7 HEMI
If you’re shopping for a used 2012 5.7 HEMI, a thorough pre-purchase check can reduce the risk of surprise repairs and extend maintenance intervals beyond the purchase.
- Check for visible oil leaks around valve covers, oil pan, and front seals; document any fluid seepage and address promptly.
- Listen for misfires or rough idle, particularly when the engine transitions in and out of MDS cylinder deactivation.
- Inspect exhaust manifolds and heat shields for leaks or loose bolts; listen for ticking or tapping sounds that could indicate exhaust issues.
- Review maintenance records for timely oil changes, coolant flushes, and transmission service; verify that spark plugs have been replaced at appropriate intervals given mileage.
- Scan for recalls and service campaigns using the VIN to ensure any manufacturer-released fixes have been completed.
Key inspection and verification steps:
Conclusion: A well-documented service history with signs of regular maintenance and no chronic leaks or drivetrain faults is a strong indicator of a solid used example.
Maintenance tips to maximize longevity
Proactive care helps the 2012 5.7 HEMI keep performing well over the years. Here are practical steps owners should consider.
- Follow the manufacturer’s oil-change interval with high-quality synthetic oil, typically every 5,000–7,500 miles depending on driving habits and climate.
- Use the recommended grade and keep up with coolant, brake fluid, and transmission fluid changes as per the service schedule.
- Monitor MDS behavior; if cylinder deactivation sounds or rough idle occurs, have the system diagnosed early to prevent potential misfires or catalyst stress.
- Inspect engine mounts, exhaust hardware, and belts for wear; address leaks or noise before they escalate into bigger problems.
- Stay on top of spark-plug service, especially in higher-mileage engines where plug replacement can be more involved due to reach and access.
Maintenance actions to prioritize:
With consistent upkeep, the 2012 5.7 HEMI can still deliver strong performance and respectable longevity in daily driving and light towing scenarios.
Bottom line
The 2012 5.7 HEMI remains a capable, widely supported V8 option with a track record of durability when properly cared for. It rewards owners who keep up with maintenance, pay attention to potential MDS or exhaust-related quirks, and stay mindful of the fuel economy trade-offs inherent to a larger-displacement engine. For buyers and owners, the key is routine service, proactive inspections, and a well-documented maintenance history.
Summary
In summary, the 2012 5.7 HEMI is a strong engine choice for those who value power, towing capability, and a robust parts-and-service ecosystem. It’s not a fuel economy leader, but with disciplined maintenance it can deliver reliable, long-lasting performance. Prospective buyers should focus on maintenance history, signs of typical wear, and a careful inspection of the exhaust and MDS-related behavior to gauge overall condition.
