Chrysler 6.4L 392 HEMI Engine Specs, Problems & Reliability

Chrysler 6.4L 392 HEMI Engine

Here in this post, I have gathered information about the Chrysler 6.4L 392 HEMI Engine from its official website, including its specifications, Problems, and Reliability.

We believe in providing reliable information to our readers, therefore we prefer to obtain information on the Chrysler 6.4L 392 HEMI Engine from authentic sources.

This article, which has been updated, has all the information you require about the Chrysler 6.4L 392 HEMI Engine.

Chrysler 6.4L 392 HEMI Engine

In the 2011 Dodge Challenger SRT8, Chrysler debuted a mass-produced version of the crate 392 Hemi engine.

The 6.4-litre V8 was a naturally aspirated version of the 5.7-litre Hemi V8. The Ram 2500 and 3500 pickups, as well as the Ram 3500, 4500, and 5500 cab chassis, received an updated 6.4L Hemi SRT in 2014.

The truck’s 6.4 Hemi engine is better suited for hauling and towing than the smaller 5.7L version, just as is the 6.7L ISB Cummins turbocharged diesel engine.

Let’s have a look at the 6.4L/392 Hemi engine and see what we can learn about its design, typical issues, reliability, and lifespan.

Mopar 6.4L Hemi Block Specs

Casting Numbers5037473BE (or)
5037473BG “6.4L”
Displacement6.4L / 391 c.i.d.
Bore Dia.4.090″
Deck Height9.25″
Bore Spacing4.46″
Thrust Bearing LocationNumber 3
Main Cap Style2 Bolts with Lateral Cross-Bolts
Cam-to-Crank Centerline7.44″
Bellhousing Bolt PatternSame as Earlier Magnum LA V8 Small Block, but with Top Center Bolt Eliminated
Piston SquirtersYes
Casting NumberCar/SUV
5037369BD (or)
05045468AE (and)
68166435AA, AB, AC, AD
Cylinder Head Material356 T6 Aluminum
Combustion Chamber74cc
Intake Port ShapeSquare
Exhaust Port Shape“D” Shaped
Intake Valve Diameter2.14″
Intake Valve DesignHollow Stem
Exhaust Valve Diameter1.65″
Exhaust Valve DesignHollow Stem, Sodium Filled
Cylinder Head Bolt StyleTorque to Yield (TTY)
Cylinder Head Bolt SizeM12 x 1.5mm & 8mm
Spark Plug14mm, Gasket, 1.043″ Reach, Projected Nose, 5/8″ hex

Mopar 6.4L Hemi Valvetrain Specs

Lifter DesignHydraulic
Lifter RetainerPlastic Holder
Lifter Body Diameter0.842″
Rocker Arm Mounting StyleShaft
Rocker Arm StyleDie Cast, Roller Fulcrum
Rocker Ratio1.60:1 (Intake)
1.66:1 (Exhaust)
Valve Spring StyleBeehive
Valve Angle18° (Intake)
16.5° (Exhaust)
Timing Chain Guide StyleSpring-Loaded Tensioner

6.4L Hemi Throttle Body, Fuel Injectors, Oil Pan & More

Intake ManifoldComposite
“Active” with variable length
Throttle Body80mm, 4-Bolt
Throttle ControlElectronic
Fuel Injector FlowCar/SUV
27 lb./hr. @ 58 PSI
MD/HD Truck
31 lb./hr. @ 58 PSI
Flex Fuel CapableNo
Fuel Injector ConnectorUSCAR, EV6
Crankshaft Reluctor Ring58x
Camshaft Sensor LocationPassenger Side, Front
Oil PumpGerotor
Variable Cam Timing (VVT)Yes
Firing Order1-8-4-3-6-5-7-2
Total Weight, Full Dress582 lbs.

Chrysler 6.4L 392 HEMI Engine Problems & Reliability

The 6.4-liter 392 Hemi is an excellent, dependable V8 engine with even more power and torque than the 5.7-litre Hemi. When used normally, this engine has not been linked to any significant issues.

The 6.4-litre Hemi V8 also features the MDS system, so it can “tick” like the 5.7-litre model. Rest assured that “the family’s tick” has no bearing on anything.

Clean, light 0W-40 oil is required for the Cylinder Deactivation System (MDS).

Consequently, it is crucial to stick to the specified oil and schedule regular oil changes.

The 6.4 Hemi is a large, American-made, pushrod V8 engine that comes with a 100,000-mile/5-year warranty from the manufacturer.

The standard 6.4 Hemi is a fantastic motor that will last for countless miles and provide reliable service.

However, factory 6.4 is not intended for use with a turbocharger or other means of increasing output.

The standard drivetrain is not designed to handle such loads. There is not enough material between the ring lands and the top of the piston, indicating that the pistons are not forged.

Exhaust manifold studs may burst if they are too hot and the manifold twists. Therefore, it is not as lenient as General Motors’ LS line of vehicles.

Chrysler 6.4L 392 HEMI Engine Review 

The Chrysler 6.4L HEMI engine was introduced as a naturally aspirated V8 in 2011. The engine is part of the HEMI engines family, which is known for its large displacement, high performance, and distinctive exhaust noise. For a full review, please check this YouTube video Here.

Chrysler 6.4L 392 HEMI Engine FAQ

How much horsepower does a 6.4 L 392 Hemi have?

The 410-horsepower BGE 392 Hemi (or 6.4-litre) is standard in all Ram trucks manufactured after 2014 (HD2500 and above). The Apache 392 engine found in modern Jeeps (2012–present) is rated at 470 horsepower.

Is 392 Hemi the same as 6.4 Hemi?

The 6.4L/392 HEMI engine used in the Challenger/Charger and the Durango/Grand Cherokee SRT share essentially the same internal components, despite the fact that this may cause some misunderstanding among enthusiasts.

From 2011 to 2014, these engines produced 470 hp at 6,000 rpm and 470 lb-ft of torque at the factory.

Is the 6.4-litre Hemi a good engine?

The 6.4-litre gas Hemi is an excellent motor, but it does have a few drawbacks. Choose the 8-speed transmission over the 6-speed if you plan on towing, as it more effectively regulates the power.

Is the 392 engine same as the Hellcat?

The Hellcat 6.2-liter supercharged V-8 is standard on the Durango SRT Hellcat and, in this application, produces 710 horsepower and 640 pound-feet of torque.

A 6.4-litre V-8 engine that is naturally aspirated and capable of producing 475 horsepower and 470 pound-feet of torque powers the Durango SRT 392. 

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