Chrysler PowerTech engine


Chrysler PowerTech engine
Chrysler PowerTech engine
Manufacturer Chrysler Group, LLC
Production 1999–
Predecessor Chrysler LA engine

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.

Chrysler also used the "PowerTech" name on other engines used in Jeep vehicles, including some later units of the 2.5 L I4 and 4.0 L I6 designs inherited from AMC after buying that company out in 1987, and the 2.4 L Neon four cylinder engine. 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.

Contents

4.7

4.7 L PowerTech V8 engine in a Jeep Grand Cherokee

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 a chain-driven overhead camshaft. It originally produced 235 hp (175 kW) and 295 ft·lbf (400 N·m) of torque. The 2010 4.7l has 2 valves and 2 spark plugs per cylinder and puts out 302 hp (225 kW) and 329 ft·lbf. 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.

Applications:

4.7 HO/Magnum

A "High-Output" version of the 4.7 L PowerTech engine, producing 265 hp (198 kW) and 330 ft·lbf (448 N·m) of torque, was introduced in 2002, first appearing in the Jeep Grand Cherokee Overland.

Applications:

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 ft·lbf of torque. See Allpar's page on the latest 4.7 L.

3.7 EKG

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).[1]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 ft·lbf (319 Nm) of torque at 4000 rpm.[1] 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:

2.4

The 2.4 L I4 PowerTech is a Neon engine variant. The 2.4 L 4-cylinder engine has 150 hp (110 kW) and 165lb.-ft (224 nm). This engine was available in the 2002-2005 Jeep Liberty, but was discontinued when Jeep introduced the Compass and Patriot small crossovers. Those two vehicles also received 2.4 L I4s as base engines, but these were of the GEMA architecture and should not be confused with the Neon/PowerTech engine of the same displacement.

References

  1. ^ a b "Jeep - Specs & Upgrades". Chrysler LLC. http://www.jeep.com/bridge/vehsuite.html?app=vehiclespecs&family=liberty&model=Technical&zipcode=10101&year=2008. 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


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