Chrysler HEMI 5.7 (EZB)

Chrysler HEMI 5.7 (EZB)The Chrysler HEMI 5.7 (EZB) is a 5.7 l (5,654 cc, 345 natural aspirated V8 90° four-stroke gasoline engine from Chrysler HEMI family. This engine was manufactured from 2003 up to 2009 on Chrysler’s Saltillo Engine plant in Ramos Arizpe, Mexico.

The Chrysler HEMI 5.7 EZB engine features a cast-iron block and two aluminum heads with hemispherical combustion chambers, a single camshaft (OHV), and two valves per cylinder (16 valves in total). The Chrysler HEMI 5.7 engine used an electronically-controlled Sequential Multi-Port Electronic Fuel Injection system, distributorless, coil over plug ignition system with two spark plugs per cylinder and Multi-Displacement System (MDS), which enabled the engine to switch from eight to four-cylinder operation.

The compression ratio rating is 9.6:1. The cylinder bore and the piston stroke are 99.5 mm (3.92 in) and 90.9 mm (3.58 in), respectively.

The HEMI 5.7 EZB produced 345 PS (253 kW; 340 HP) at 5,000 rpm of horsepower and 529 N·m (53.9 kg·m, 389.9 ft·lb) at 4,000 rpm of torque for the Chrysler 300C and Dodge Magnum R/T, and 350 PS (257 kW; 347 HP) at 5,000 rpm of horsepower and 508 N·m (51.8 kg·m, 374.4 ft·lb) at 4,000 rpm of maximum torque for other vehicles.

General information

Engine Specifications
Engine modelChrysler HEMI 5.7 (EZB)
LayoutFour stroke, V8
Fuel typeGasoline (petrol)
Displacement5.7 L, 5,654 cc (345.0 cu in)
Fuel systemSequential Multi-Port Electronic
Power adderNone
Power output 345 PS (253 kW; 340 HP) at 5,000 rpm
350 PS (257 kW; 347 HP) at 5,000 rpm
Torque output 508 N·m (51.8 kg·m, 374.4 ft·lb) at 4,000 rpm
529 N·m (53.9 kg·m, 389.9 ft·lb) at 4,000 rpm
Firing order1-8-4-3-6-5-7-2
Weigh:245 kg (540 lbs)

Cylinder block

The HEMI 5.7 EZB engine has a cast-iron block with a five-bearings crankshaft supported system. The cylinder bore is 99.5 mm (3.92 in), piston stroke is 90.9 mm (3.58 in) and the compression ratio rating is 9.6:1. This motor has aluminum alloy pistons with two compression and one oil control ring, forged steel connecting rods, and nodular iron crankshaft. The crankshaft main journal diameter is 65.0 mm (2.56 in) and the crankpin diameter is 54.0 mm (2.13 in).

Cylinder block
Cylinder block alloyCast-iron
Compression ratio:9.6:1
Cylinder bore:99.5 mm (3.92 in)
Piston stroke:90.9 mm (3.58 in)
Number of piston rings (compression / oil):2/1
Number of main bearings:5
Cylinder inner diameter (standard):99.500 mm (3.9173 in)
Piston skirt diameter (standard):
Piston pin outer diameter:24.000-24.003 mm (0.9449-0.945 in)
Piston ring side clearance:Top0.020-0.068 mm (0.0008-0.0027 in)
Second0.020-0.058 mm (0.0008-0.0023 in)
Oil0.019-0.229 mm (0.0007-0.009 in)
Piston ring end gap:Top0.230-0.380 mm (0.0091-0.015 in)
Second0.350-0.600 mm (0.0138-0.0236 in)
Oil0.150-0.660 mm (0.0059-0.026 in)
Ring width:Top1.472-1.490 mm (0.058-0.0587 in)
Second1.472-1.490 mm (0.058-0.0587 in)
Oil (Steel Rails)0.447-0.473 mm (0.0176-0.0186 in)
Crankshaft main journal diameter:64.988-65.012 mm (2.5586-2.5595 in)
Crankpin diameter:53.992-54.008 mm (2.1257-2.1263 in)

Main bearing cap bolts tightening procedure and torque specs:

  • M12: 27 Nm; 2.75 kg·m; 19.9 ft·lb and plus 90°
  • Crossbolts M8: 28 Nm; 2.86 kg·m; 20.7 ft·lb)

After securing bearing cap bolts, make sure crankshaft turns smoothly by hand.

Connecting rod cap bolts

  • 21 Nm; 2.14 kg·m; 15.5 ft·lb and plus 90°

Cylinder head

The cylinder heads are made of aluminum alloy. The engine has a single camshaft and over-head valves. The camshaft is driven by a single timing chain. The intake valve head diameter is 50.8 mm, the intake duration is 253° the exhaust valve diameter is 39.4 mm, the exhaust duration is 253.7°. The Chrysler HEMI 5.7 EZB engine is equipped with hydraulic valve tappets.

Cylinder head
Block head alloyAluminum
Valve Arrangement:OHV, chain drive
Head surface flatness
Valves:16 (2 valves per cylinder)
Intake valve timing253°
Exhaust valve timing:253.7°
Valve head diameter:INTAKE50.70-50.93 mm (1.9961-2.0051 in)
EXHAUST39.27-29.53 mm (1.5461-1.1626 in)
Valve length:INTAKE123.38-123.76 mm (4.8575-4.8724 in)
EXHAUST120.47-120.85 mm (4.7429-4.7579 in)
Valve stem diameter:INTAKE7.935-7.953 mm (0.3124-0.3131 in)
EXHAUST7.905-7.925 mm (0.3112-0.312 in)
Valve spring free length:57.3 mm (2.2559 in)
valve lift:INTAKE12.0 mm (0.4724 in)
EXHAUST11.70 mm (0.4606 in)

Head tightening procedure and torque specs:

M12 bolts:

  • Step 1: 34 Nm; 3.47 kg·m; 25.1 ft·lb
  • Step 2: 54 Nm (5.51 kg·m; 39.8 ft·lb
  • Step 3: Turn all bolts 90°

Cylinder head cover bolts

  • Step 1: 20 Nm; 2.04 kg·m; 14.8 ft·lb
  • Step 2: 34 Nm; 3.47 kg·m; 25.1 ft·lb

Maintenance data

Maximum speed:5,800 rpm
Oil system
Recommended engine oilSAE: 5W-20
Oil typeMopar engine oil or equivalent
Engine oil capacity (Refill capacity)6.6 L (6.97 US. qt, 5.81 Imp. qt.)
Oil pressure Idle speed: 25 kPa (4 psi)
3,000 rpm 170-758 kPa (25-110 psi)
Ignition system
Spark plugChampion RE14MCC4
Spark plug gap1.14 mm (0.0449 in)
Spark plug tightening torque20 N·m (2.0 kg·m, 14.7 ft·lb))

Vehicle applications

ModelYears Produced
Ram Pickup2003-2008
Dodge Durango2004–2008
Dodge Magnum R/T2005–2008
Chrysler 300C2005–2008
Jeep Grand Cherokee2005–2008
Dodge Charger R/T2006–2008
Jeep Commander2006–2008
Chrysler Aspen2007–2008
Author: Sergei Wers
About: Co-founder and CEO of a multi-brand auto repair shop (engine repair, chassis repair, body repair and painting) for over 15 years. I have been developing internet sites with technical specifications for more than seven years.

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1 Comment

  1. The information was very helpful and easy to understand. It gave me everything I needed to know. I appreciate the thoroughness.

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