Chrysler PowerTech engine
|Manufacturer||DaimlerChrysler AG (1999–2007)
Chrysler LLC (2007–2009)
Chrysler Group LLC (2009-2013)
|Also called||Next Generation Magnum|
|Production||1999-April 9, 2013|
|Predecessor||Chrysler LA engine|
|Successor||Chrysler Pentastar engine (V6)
Chrysler Hemi Engine (V8)
|Cylinder block alloy||Cast iron|
|Cylinder head alloy||Aluminum|
|Valvetrain||Single overhead camshaft|
|Fuel system||Sequential Multiple-Port Fuel Injection|
|Oil system||Wet sump|
The PowerTech was a new engine family for Chrysler, and was not based on the Chrysler A engine as existing Chrysler V8s were. A 4.7 L V8 came first, fitted in the Jeep Grand Cherokee, and a 3.7 L V6 version debuted in 2002 for the Jeep Liberty. The PowerTech V6 and V8 were direct replacements for Chrysler's LA family in the early 2000s, and were also used in the Dodge Ram. They were not used in any cars, but were reserved for truck and SUV use. They are also known as Next Generation Magnum in Dodge applications.The PowerTech V6 and V8 engines are produced at the Mack Avenue Engine Complex in Detroit, Michigan. E85 compatible versions of some PowerTech engines were developed and used in numerous Chrysler vehicles. On April 9, 2013 the last 4.7 L engine was built; ending 15 years of production with over 3 million examples built.
The 4.7-liter version was the first of this family, appearing in the 1999 Jeep Grand Cherokee. The displacement is 287 cubic inches (4698 cc) with a bore of 3.66 in (93 mm) and a stroke of 3.405 in (86.5 mm). It has a cast iron block and aluminum heads with two valves per cylinder. It uses chain-driven overhead camshafts, one in each head. It originally produced 235 hp (175 kW) and 295 lb·ft (400 N·m) of torque. The 2012 4.7L has 2 valves and 2 spark plugs per cylinder and puts out 310 hp (230 kW) and 330 lb·ft (450 N·m). Dodge has claimed that it has increased compression ratio and improved cylinder head port flow, the 4.7 L V8 is available with three transmissions.
The PowerTech was on the Ward's 10 Best Engines list for 1999.
- 1999–2009 Jeep Grand Cherokee
- 2000–2011 Dodge Dakota
- 2000–2009 Dodge Durango
- 2002–2013 Dodge Ram 1500
- 2006–2009 Jeep Commander
- 2007–2009 Chrysler Aspen
4.7 HO/Magnum 
A "High-Output" version of the 4.7 L PowerTech engine, producing 265 hp (198 kW) and 330 lb·ft (450 N·m) of torque, was introduced in 2002, first appearing in the Jeep Grand Cherokee Overland.
- 2002–2004 Jeep Grand Cherokee
- 2002–2007 Dodge Dakota
- 2002–2007 Dodge Ram 1500
- 2006–2007 Mitsubishi Raider
2008 Revisions 
The 2008 Dodge Dakota and Ram pickup trucks, Dodge Durango and Chrysler Aspen SUV's, Jeep Grand Cherokee, and Jeep Commander came with a Corsair version of the FFV 4.7 L engine, with dual spark plugs per cylinder, a new slant / squish combustion system design, and 9.8:1 compression, raising power to 290–310 hp (220–230 kW) and 320–334 lb·ft (434–453 N·m) of torque. See Allpar's page on the latest 4.7 L.
3.7 EKG 
The EKG is a 3.7 L V6 version built in Detroit, Michigan. It displaces 226.0 cubic inches (3701 cc). The bore is 3.66 in (93 mm) and stroke is 3.57 in (91 mm). It is a 90° V engine like the V8, with SOHC 2-valve heads. It utilizes a counter-rotating balance shaft mounted between the cylinder banks to deal with vibration problems of the 90-degree V6 design, as well as use a 30-degree split pin crankshaft to fire the cylinders every 120 degrees. Output is 210 hp (160 kW) at 5200 rpm with 235 lb·ft (319 N·m) of torque at 4000 rpm. It has a cast iron engine block and aluminum SOHC cylinder heads. It uses SFI fuel injection, has roller followers, and features fracture-split forged powder metal connecting rods and an assembled reinforced plastic intake manifold. Applications:
- 2002–2012 Dodge Ram 1500
- 2004–2011 Dodge Dakota
- 2004–2009 Dodge Durango
- 2007–2011 Dodge Nitro
- 2002–2013 Jeep Liberty/Cherokee
- 2005–2010 Jeep Grand Cherokee
- 2006–2010 Jeep Commander
- 2006–2010 Mitsubishi Raider
- 2002 Dodge M80
The 3.7L PowerTech V6 engine was discontinued in favor of the 3.6L Pentastar V6 engine.
- "Mack Avenue Builds Final 4.7; Looks Forward to Pentastar". Chrysler Blog. Retrieved 12 April 2013.
- "Jeep - Specs & Upgrades". Chrysler LLC. Retrieved 2008-01-14. "Engine - Displacement - Cubic Inches...226.0. Engine - Displacement - Cubic Centimeters...3701; bore (in.)...3.66; stroke (in.)...3.57"