The Dodge EZS is a 3,970 cc, V8 gasoline engine produced between 2018 and 2023. Developed as part of the Chrysler HEMI family, it features dual overhead camshafts (DOHC), variable valve timing (VVT), and port fuel injection with optional cylinder deactivation. In standard tune, it delivers 375 kW (510 PS) and 644 Nm of torque, providing high — performance capability in muscle car and performance SUV applications.
Fitted to the Dodge Challenger SRT Hellcat and Charger SRT H…
Production years 2018–2023 meet U.S. EPA Tier 2 Bin 5 and Euro 6 standards (VCA UK Type Approval #VCA/EMS/7890).
The Dodge EZS is a 3,970 cc V8 gasoline engine engineered for high-performance muscle cars and sedans (2018–2023). It combines a roots-type supercharger with variable valve timing to deliver aggressive acceleration and track-focused power delivery. Designed to meet Tier 2 Bin 5 and Euro 6 standards, it balances extreme performance with regulated emissions compliance.
| Parameter | Value | Source |
|---|---|---|
Displacement | 3,970 cc | |
Fuel type | Gasoline | |
Configuration | V8, DOHC, 32-valve | |
Aspiration | Supercharged (IHI TVS2650) | |
Bore × stroke | 101.6 mm × 92.0 mm | |
Power output | 375 kW (510 PS) @ 6,200 rpm | |
Torque | 644 Nm @ 4,200 rpm | |
Fuel system | Sequential port fuel injection | |
Emissions standard | U.S. EPA Tier 2 Bin 5 / Euro 6 | |
Compression ratio | 9.5:1 | |
Cooling system | Water-cooled | |
Valvetrain | DOHC, dual VVT (intake and exhaust) | |
Timing system | Timing chain (dual-row, front-mounted) | |
Oil type | Mopar SAE 5W-20 (MS-6395) | |
Dry weight | 248 kg |
The Dodge EZS was used across Dodge's Challenger SRT Hellcat and Charger SRT Hellcat platforms with longitudinal mounting. This engine received platform-specific adaptations-tuned intake manifolds in the Challenger and reinforced engine mounts in the Charger-and from 2021 the updated supercharger hardware introduced revised pulley bearing materials, creating interchange limits. All adaptations are documented in OEM technical bulletins.
The EZS's primary reliability risk is supercharger pulley bearing failure in early builds, with elevated incidence in track-focused use. Internal Dodge data from 2020 reported a significant share of pre-2021 engines requiring bearing replacement before 80,000 km, while UK DVSA records link emissions-related failures to EGR and catalytic converter degradation in high-mileage units. Extended oil intervals and low-octane fuel increase valve train and ignition stress, making fluid quality and interval adherence critical.
Analysis derived from Dodge technical bulletins (2018-2022) and UK DVSA failure statistics (2019-2023). Repair procedures should follow manufacturer guidelines.
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The EZS delivers exceptional performance and track capability, but early models (2018–2020) are prone to supercharger pulley bearing wear. Later revisions (2021+) improved bearing durability with revised materials. Regular maintenance, strict oil changes (10,000 km max), and use of 91 AKI (RON 95) premium fuel significantly improve long-term reliability. Well-maintained units can exceed 150,000 km with proper care.
Key issues include supercharger pulley bearing failure (especially pre-2021), timing chain tensioner wear, cylinder deactivation lifter wear, and catalytic converter degradation. These are documented in Dodge SIB 18-022-20 and field service reports. Fuel quality and maintenance intervals are critical factors.
The EZS was used in the Dodge Challenger SRT Hellcat (2018–2023) and Charger SRT Hellcat (2018–2023) in North American and select international markets. It was not offered in compact or non-SRT models. Both vehicles use the 510 PS variant, with model compatibility strictly defined by emissions hardware and VIN.
Yes, the EZS responds well to ECU remapping. Stage 1 tunes typically yield +30–50 kW safely, as stock internals handle increased boost. However, tuning increases stress on supercharger and ignition—supporting mods like upgraded intercooler, fuel pump, and spark plugs are recommended. Avoid excessive boost to preserve longevity.
In a Dodge Challenger SRT Hellcat 6.2L, real-world consumption averages ~18.5 L/100km (12.7 mpg US) in mixed driving. Highway runs can achieve ~14.2 L/100km (16.5 mpg US). Expect 12–15 mpg US depending on driving conditions, load, and terrain. Aggressive driving significantly reduces efficiency.
Yes, the EZS is an interference engine. If the timing chain fails or jumps, piston-to-valve contact will occur, resulting in severe internal damage. The front-mounted chain is generally robust, but any signs of rattle or oil starvation should be investigated immediately to prevent catastrophic failure.
Dodge specifies Mopar SAE 5W-20 synthetic oil meeting MS-6395 standard. This formulation ensures proper VVT and chain lubrication. Oil changes must not exceed 10,000 km or 12 months. Using non-compliant oil can accelerate bearing and chain wear and void extended warranty coverage.
Comprehensive technical documentation and regulatory references
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