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2003-08 Mopar Gen. III 5.7L Hemi Engine Guide: Bore & Stroke, Cylinder Heads, Cam Specs & More

April 12, 2024 by admin Category: Top

You are viewing the article 2003-08 Mopar Gen. III 5.7L Hemi Engine Guide: Bore & Stroke, Cylinder Heads, Cam Specs & More  at Tnhelearning.edu.vn you can quickly access the necessary information in the table of contents of the article below.

IS THE 5.7 HEMI A GOOD ENGINE? THINGS YOU DIDN’T KNOW!
IS THE 5.7 HEMI A GOOD ENGINE? THINGS YOU DIDN’T KNOW!

When Chrysler announced it was bringing back the legendary Hemi in the early 2000s, it was a big deal. This new series of Hemi engines is often referred to as the “Gen. 3” after the first generation FirePower (1951-59) and second generation Elephant 426 (1964-71).

Note: This Spec Guide is part of a series of Hemi Engine Spec guides we’re putting together. See Other Hemi Engine Spec Guides Here.

Table of Contents

  • The Hemi Returns!
  • 2003-08 Mopar Gen. III 5.7L Hemi Engine Performance
  • 2003-08 Mopar Gen. III 5.7L Hemi Engine Identification
  • 2003-08 Mopar Gen. III 5.7L Hemi Engine Block Specs
  • 2003-08 Mopar Gen. III 5.7L Hemi Engine Rotating Assembly
  • 2003-08 Mopar Gen. III 5.7L Hemi Engine Cylinder Heads
  • 2003-08 Mopar Gen. III 5.7L Hemi Engine Camshaft Specs
  • 2003-08 Mopar Gen. III 5.7L Hemi Engine Valvetrain Specs
  • Other 2003-08 Mopar Gen. III 5.7L Hemi Engine Specs

The Hemi Returns!

The first edition of the third generation Mopar Hemi engine made its debut in 2003 Dodge Ram trucks and featured a 5.7 liter (345 cubic inch) displacement.

Still considered a small-block engine based on displacement, the 5.7L Gen. III Hemi uses a hemispherical combustion chamber with two spark plugs per cylinder and small wedge flats along with excellent intake and exhaust ports.

  HEMI V8 Looks Safe for the Foreseeable Future

This 5.7L engine configuration would be the basis for future Hemi displacement variations.

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This Engine Guide is Specifically for the 2003-08 Mopar Gen. III 5.7L Hemi Engine.

…

2003-08 Mopar Gen. III 5.7L Hemi Engine Performance

Mopar 5.7L Hemi Performance Ratings
Version Truck Car
Displacement 5.7L 5.7L
Compression Ratio 9.6:1 9.6:1
Horsepower 345 hp 340 hp
Torque 375 lb.-ft. 390 lb.-ft.

2003-08 Mopar Gen. III 5.7L Hemi Engine Identification

Mopar 5.7L 2003-08 Truck Engine Applications
VIN Number Digit Year Make Model
8th digit of VIN: “D” 2003-08 Dodge Ram 1500

2003-08 Mopar Gen. III 5.7L Hemi Engine Block Specs

Mopar 5.7L Hemi Block Specs
Casting Numbers 53021319AG
53021319CB
50321314 DR
Material Iron
Displacement 5.7L / 345 c.i.d.
Bore Dia. 99.5mm / 3.92″
Stroke 90.9mm / 3.58″
Deck Height 9.25″
Bore Spacing 4.46″
Thrust Bearing Location Number 3
Main Cap Style 2 Bolts with 2 Lateral Cross-Bolts (All 5 Mains)
Cam-to-Crank Centerline 7.44″

2003-08 Mopar Gen. III 5.7L Hemi Engine Rotating Assembly

Mopar 5.7L Hemi Rotating Assembly Specs
Piston Material Hypereutectic
Piston Style Flat Top with Valve Notches
Piston Ring Package 1.5mm, 1.5mm, 3.0mm
Wrist Pin Diameter 0.9456″
Connecting Rod Material Powdered Metal
Connecting Rod Style I-Beam
Connecting Rod Length 6.242″
Connecting Rod Bearing Bore 2.125″
Connecting Rod Bolts 9.0mm x 1
Crankshaft Material Nodular Iron
Crankshaft Part Number 53021302AD
Crankshaft Casting Numbers 53021319AG
53021319CB
53021300AA
Crankshaft Main Journal Dia. 2.559″
Crankshaft Rod Journal Dia. 2.126″
Balance Internal
Crankshaft Reluctor Count 32x
Crankshaft Mounting Flange 8 Bolts
  Hemi Engine Autopsy: The Rebuild

2003-08 Mopar Gen. III 5.7L Hemi Engine Cylinder Heads

Mopar 5.7L Hemi Cylinder Head Specs
Casting Numbers 53021300AJ (Right)
53021300BA (Left)
Cylinder Head Material Aluminum
Combustion Chamber Volume 85cc
Combustion Chamber Design Hemispherical, with Quench & 2 Spark Plugs Per Cylinder
Intake Port Shape Square, with Dimple
Intake Runner Volume 161cc
Exhaust Port Shape Square
Exhaust Port Volume 50cc
Intake Valve Diameter 2.00″
Exhaust Valve Diameter 1.55″
Cylinder Head Bolt Style Torque to Yield (TTY)
Cylinder Head Bolt Size M12 x 1.5mm & 8mm
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2003-08 Mopar Gen. III 5.7L Hemi Engine Camshaft Specs

Mopar 5.7L Hemi Camshaft Specs
Design Hydraulic Roller
Advertised Duration

(Intake/Exhaust)

260 / 268
Valve Lift

(Intake/Exhaust)

.0472″ / .0460″
Cam Journal Dia. 2.24″ / 57mm Front (Smaller to the Rear)

2003-08 Mopar Gen. III 5.7L Hemi Engine Valvetrain Specs

Mopar 5.7L Hemi Valvetrain Specs
Lifter Design Hydraulic Roller
Lifter Link Style Plastic Guide x 4
Lifter Body Diameter 0.842″
Pushrod Length Varies by Application
Rocker Arm Mounting Style Shaft
Rocker Arm Style Die Cast, Roller Fulcrum
Rocker Ratio 1.60:1 (Intake)

1.66:1 (Exhaust)

Rocker Offset None
Valve Spring Style Beehive
Valve Angle 18° (Intake)

16.5° (Exhaust)

Intake Valve Material Steel, Solid Stem
Intake Valve Diameter 2.00″
Exhaust Valve Material Steel, Solid Stem
Exhaust Valve Diameter 1.55″
Valve Stem Diameter 0.3125″
Timing Chain Guide Style Spring-Loaded Tensioner
  JASPER Remanufactured Engines & Transmissions

Other 2003-08 Mopar Gen. III 5.7L Hemi Engine Specs

5.7L Hemi Throttle Body, Fuel Injectors, Oil Pan Specs & More
Intake Manifold Composite, Fixed Runner Length
Throttle Body 80mm
Throttle Control Electronic
Fuel Injector Part Number 4591851AB

(& Multiple Alternates)

Fuel Injector Flow 26 lb./hr. @ 58 PSI
Flex Fuel Capable No
Fuel Injector Connector USCAR, EV6
PCM NG3C / NGC4
Crankshaft Reluctor Ring 32 Teeth
Camshaft Sensor Location Passenger Side, Front
Oil Pan Varies by Application
Oil Pump Gerotor
Variable Valve Timing (VVT) No
Multi-Displacement System (MDS) Yes, on 2005+ Models
Firing Order 1-8-4-3-6-5-7-2
Total Weight, Full Dress 560 lbs.

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