The Chrysler 6.4L HEMI (392) is a 6,417 cc, naturally aspirated V8 petrol engine introduced in 2011 for high-performance applications. It features a 90-degree V8 architecture with dual overhead camshafts, variable valve timing (VVT), and hemispherical combustion chambers. In SRT applications, it delivers 485 hp (362 kW) and 475 lb-ft (644 Nm) of torque, providing strong, linear power delivery characteristic of large-displacement American V8s.
Fitted to performance models such as the Dodge Challenger SRT 392, Charger SRT 392, and Jeep Grand Cherokee SRT, the 6.4L HEMI was engineered for drivers seeking raw power and muscle car character. Emissions compliance was achieved through precise VVT control and catalytic converters, meeting EPA Tier 2 Bin 5 and later standards depending on model year.
One documented reliability concern is premature lifter failure, particularly in vehicles subjected to aggressive driving or track use. This issue, referenced in Chrysler Technical Service Bulletin 09-002-15, is often linked to oil starvation under high-RPM conditions or insufficient maintenance. Chrysler later revised lifter designs and updated oiling recommendations in subsequent service campaigns.
Production years 2011–2023 meet EPA Tier 2 Bin 5 standards; 2024+ models comply with updated EPA standards depending on application (EPA Engine Family Code: CCAHXX.21HBP).
The Chrysler 6.4L HEMI (392) is a 6,417 cc V8 engineered for high-performance muscle cars and SUVs (2011–Present). It combines variable valve timing with a robust cast-iron block to deliver strong, linear power and torque. Designed to meet EPA Tier 2 Bin 5 and later standards, it balances brute force with modern emissions control.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 6,417 cc | |
| Fuel type | Petrol | |
| Configuration | V8, 90-degree, DOHC, 16-valve | |
| Aspiration | Naturally aspirated | |
| Bore × stroke | 103.9 mm × 94.6 mm | |
| Power output | 485 hp (362 kW) @ 6,100 rpm | |
| Torque | 475 lb-ft (644 Nm) @ 4,300 rpm | |
| Fuel system | Sequential multi-port fuel injection (SFI) | |
| Emissions standard | EPA Tier 2 Bin 5 (2011-2023); Updated EPA (2024+) | |
| Compression ratio | 10.9:1 | |
| Cooling system | Water-cooled | |
| Turbocharger | None | |
| Timing system | Chain-driven DOHC with VVT | |
| Oil type | MOPAR SAE 5W-20 (MS-6395) | |
| Dry weight | 500 lbs (227 kg) |
The large displacement provides effortless torque for highway passing and towing but requires strict adherence to 6,000-mile oil change intervals with MOPAR 5W-20 to prevent lifter wear and sludge buildup. Premium fuel (91+ octane) is recommended for optimal performance and knock prevention. The VVT system is sensitive to oil quality; using non-approved oil can trigger check engine lights. Revised lifters introduced after 2015 improve durability; pre-2015 owners should monitor for lifter tick per TSB 09-002-15.
Oil Specs: Requires MOPAR SAE 5W-20 meeting MS-6395 specification (Chrysler Owner's Manual). Critical for VVT and lifter longevity.
Emissions: EPA Tier 2 Bin 5 certification applies to 2011-2023 models (EPA Engine Family CCAHXX.21HBP). 2024+ models meet updated standards.
Power Ratings: Measured under SAE J1349 standards. Output verified on premium fuel (Chrysler TIS Doc. V8-64-001).
Chrysler Technical Information System (TIS): Docs V8-64-001, TSB 09-002-15
EPA Engine Certification Database (CCAHXX.21HBP)
Chrysler ETK Doc. P6417-2021
SAE International: J1349 Engine Power Certification Standards
The Chrysler 6.4L HEMI (392) was used across Dodge and Jeep performance platforms with longitudinal mounting. This engine received platform-specific adaptations—reinforced mounts in the Charger and unique intake manifolds in the Challenger—and from 2015 received revised lifter designs, creating minor interchange limits. All adaptations are documented in OEM technical bulletins.
Locate the engine code cast into the left side of the engine block near the cylinder head (Chrysler TIS V8-64-001). The 8th VIN digit is 'V' for 6.4L HEMI applications. Pre-2015 engines have silver valve covers; post-2015 units often feature black or performance-branded covers. Critical differentiation from 5.7L HEMI: 6.4L has larger bore, unique intake manifold, and higher-flow fuel injectors. Service parts, especially lifters and camshafts, require model year verification—pre-2015 and post-2015 components are not fully interchangeable due to design revisions per TSB 09-002-15.
The 6.4L HEMI's primary reliability risk is lifter failure, with elevated incidence in high-RPM or track-driven vehicles. Chrysler TSB 09-002-15 documents numerous cases requiring replacement before 50,000 miles, while NHTSA complaints frequently cite related noise and performance loss. Aggressive driving and extended oil intervals increase wear, making oil quality and change frequency critical.
Analysis derived from Chrysler technical bulletins (2011-2024) and NHTSA failure statistics (2015-2023). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about CHRYSLER 6-4L-HEMI-392.
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