Chrysler PowerTech engine

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This article is about the V6 and V8 engines. For other uses, see Chrysler PowerTech engine (disambiguation).
Chrysler Powertech engine
Jeep Grand Cherokee WJ 47 Power Tech V8.jpg
Overview
Manufacturer DaimlerChrysler AG (1999–2007)
Chrysler LLC (2007–2009)
Chrysler Group LLC (2009-2013)
Also called Next Generation Magnum
Production 1999-April 9, 2013[1]
Combustion chamber
Configuration 90° V6/V8
Cylinder block alloy Cast iron
Cylinder head alloy Aluminum
Valvetrain Single overhead camshaft
Combustion
Fuel system Sequential Multiple-Port Fuel Injection
Fuel type Gasoline
E85
Oil system Wet sump
Cooling system Water-cooled
Chronology
Predecessor Chrysler LA engine
Successor Chrysler Pentastar engine (V6)
Chrysler Hemi Engine (V8)

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.[1]

4.7[edit]

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 2008 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 four speed and five speed automatic transmissions and a 5 speed manual transmission.

The PowerTech was on the Ward's 10 Best Engines list for 1999.

Applications:

4.7 HO[edit]

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 Limited as an option and in the Jeep Grand Cherokee Overland as standard equipment.

This engine was discontinued after the 2007 model year, though the non high output 4.7L V8 engine continued to be available in all vehicles.

Applications:

2008 Revisions[edit]

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[edit]

Chrysler PowerTech 3.7 L V6 in a 2005 Jeep Grand Cherokee

The EKG is a 3.7 L V6 version built in Detroit, Michigan. It displaces 226.0 cubic inches (3701 cc).[2] 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.[2] 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:

References[edit]

  1. ^ a b Max Gates; Jeff Kalinowski. "Mack Avenue Builds Final 4.7; Looks Forward to Pentastar". Chrysler Blog. Retrieved 12 April 2013. 
  2. ^ a b "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" 

External links[edit]