The initial design development for the PowerTech V6 and V8 engine family was done by

American Motors Corporation American Motors Corporation (AMC; commonly referred to as American Motors) was an American automobile manufacturing company formed by the merger of Nash-Kelvinator Corporation and Hudson Motor Car Company on May 1, 1954. At the time, it was t ...

(AMC) and debuted in 1998 with credit to

Chrysler Stellantis North America (officially FCA US and formerly Chrysler ()) is one of the " Big Three" automobile manufacturers in the United States, headquartered in Auburn Hills, Michigan. It is the American subsidiary of the multinational automot ...

. This was the first new

V8 engine A V8 engine is an eight- cylinder piston engine in which two banks of four cylinders share a common crankshaft and are arranged in a V configuration. The first V8 engine was produced by the French Antoinette company in 1904, developed and u ...

for Chrysler since the 1960s. The companion V6 was basically the V8 with two fewer cylinders, another concept that originated at AMC before the company joined Chrysler. These new engines had nothing in common with the Chrysler A engine V8s, nor the Jeep 4.0 L "PowerTech" I6 engine. A 4.7 L V8 came first, available in the

Jeep Grand Cherokee The Jeep Grand Cherokee is a range of mid-size SUVs produced by the American manufacturer Jeep. At its introduction, while most SUVs were still manufactured with body-on-frame construction, the Grand Cherokee has used a unibody chassis from the ...

, and a 3.7 L V6 version debuted in 2002 for the

Jeep Liberty The Jeep Liberty is a four door unibody compact SUV four-door manufactured and marketed by Jeep for model years 2002–2012 over two generations, internally designed the KJ (2002-2007) and KK (2008-2012), respectively. Both generations were marke ...

. 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 The Ram pickup (marketed as the Dodge Ram until 2010) is a full-size pickup truck manufactured by Chrysler, Stellantis North America (formerly Chrysler Group LLC and FCA US LLC) and marketed from 2010 onwards under the Ram Trucks brand. The cur ...

and started in the 2000 Dodge Durango. 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 were produced at the Mack Avenue Engine Complex in

Detroit, Michigan Detroit ( , ; , ) is the largest city in the U.S. state of Michigan. It is also the largest U.S. city on the United States–Canada border, and the seat of government of Wayne County. The City of Detroit had a population of 639,111 at ...

. 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 units built.

4.7

The 4.7-liter version was the first of this family, appearing in the 1999

. The displacement is with a bore and a stroke of . It has a cast iron block and aluminum heads with two valves per cylinder. It uses chain-driven Single overhead camshafts, one in each head. It originally produced and of

torque In physics and mechanics, torque is the rotational equivalent of linear force. It is also referred to as the moment of force (also abbreviated to moment). It represents the capability of a force to produce change in the rotational motion of t ...

. 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 10 of the World's best engines is an annual list of the ten ''"''best''"'' automobile engines available in the U.S. market, that are selected by '' Ward's AutoWorld'' magazine. The list was started in 1994 for Model Year 1995, and has been drawn ev ...

list for 1999. *1999–2009

*2000–2007

Dodge Dakota The Dodge Dakota, known as the Ram Dakota for the final two years of production, is a mid-size pickup truck from Chrysler's Ram (formerly Dodge Truck) division. The first Dakota was introduced in late 1986 as a 1987 model. From its introduction th ...

*2000–2009

Dodge Durango The Dodge Durango is a mid-size sport utility vehicle (SUV) produced by Dodge in three generations starting with the 1998 model year. The first two generations were very similar in that both were based on the Dodge Dakota and Ram Pickup, both ...

*2002–2007 Dodge Ram 1500 *2006–2009

Jeep Commander The Jeep Commander is an automobile nameplate used by Jeep since 2005 for several SUV models: * Jeep Commander (XK), a mid-size SUV produced from 2005 to 2010 * Jeep Commander (2022), a mid-size crossover SUV based on the Jeep Compass produced ...

*2007–2009 Chrysler Aspen *2006–2007 Mitsubishi Raider

4.7 HO

A "High-Output" version of the 4.7 L PowerTech engine, producing and 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 2008

model year The model year (sometimes abbreviated "MY") is a method of describing the version of a product which has been produced over multiple years. The model year may or may not be the same as the calendar year in which the product was manufactured. ...

, though the non high output 4.7L V8 engine continued to be available in all vehicles.

Applications: *2002–2004

*2007–2008

*2007–2008 Dodge Ram 1500/

Ram 1500 The Ram pickup (marketed as the Dodge Ram until 2010) is a full-size pickup truck manufactured by Stellantis North America (formerly Chrysler Group LLC and FCA US LLC) and marketed from 2010 onwards under the Ram Trucks brand. The current fif ...

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 and of torque. The 2008 4.7 also features other upgrades including a more aggressive camshaft profile, a throttle body, and an improved intake manifold with shorter runners. Se
Allpar's page on the latest 4.7 L

3.7 EKG

The EKG is a 3.7 L V6 version built in

. It displaces . The bore and stroke measure . It is a 90°

V engine A V engine, sometimes called a Vee engine, is a common configuration for internal combustion engines. It consists of two cylinder banks—usually with the same number of cylinders in each bank—connected to a common crankshaft. These cylinder ...

like the V8, with

SOHC An overhead camshaft (OHC) engine is a piston engine where the camshaft is located in the cylinder head above the combustion chamber. This contrasts with earlier overhead valve engines (OHV), where the camshaft is located below the combustion ch ...

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 at 5200 rpm with of torque at 4000 rpm. It has a cast iron engine block and aluminum

cylinder heads. It uses Sequential fuel injection, has roller followers, and features fracture-split forged powder metal

connecting rod A connecting rod, also called a 'con rod', is the part of a piston engine which connects the piston to the crankshaft. Together with the crank, the connecting rod converts the reciprocating motion of the piston into the rotation of the cranksha ...

s and an assembled reinforced plastic

intake manifold In automotive engineering, an inlet manifold or intake manifold (in American English) is the part of an engine that supplies the fuel/ air mixture to the cylinders. The word ''manifold'' comes from the Old English word ''manigfeald'' (from th ...

. The Chrysler 3.7 PowerTech engine used in the 2007 - 2012 Jeep Liberty KK used a wasted spark ignition system that uses one ignition coil to fire two cylinders. Applications *2002–2010 Dodge Ram 1500 *2011-2012

*2004–2011

*2004–2009

*2007–2011

Dodge Nitro The Dodge Nitro is a compact SUV manufactured and marketed by Dodge for model years 2007-2012 across a single generation — as a close variant of the second-generation Jeep Liberty. Both vehicles use a composite unitized construction integr ...

*2002–2012

*2005–2010

*2006–2010

*2006–2010 Mitsubishi Raider *2002 Dodge M80

References

External links

Allpar's page on the 3.7L3.7L V6 PowerTech Engine: Specs, Problems, Reliability
{{Chrysler Group LLC PowerTech V6 engines V8 engines Gasoline engines by model