Updated: Jan 21
The 2013 Dodge Dart was the first vehicle to use the 2.4L Tigershark (Jeep ED6), an inline four-cylinder naturally aspirated gasoline engine producing around 180hp. Engineers from Chrysler and Fiat worked together to create the Tigershark/MultiAir II engine family.
The 2.4-litre version contains around 90% new or refurbished components despite the fact that the new family is based on the old "World Gas Engine", which leads to improved fuel economy and performance.
The Chrysler Tigershark engine is currently available in the:
Ram ProMaster City
Table of Contents:
Chrysler 2.4L Tigershark MultiAir Engine Design
The 2.4 Tigershark's cylinder block is made of high-pressure die-cast aluminium with dry cast-iron liners. Between the engine block and the sandwich-type steel oil pan is a lightweight ladder structure for enhanced strength.
To reduce vibration, engineers installed rotating balancing shafts to the bottom of the block.
A forged steel crankshaft, powder-forged steel connecting rods, and lightweight aluminium pistons with polymer-coated piston skirts make up the engine's moving bottom parts. Piston pins have durable carbon coatings and are completely floating.
To lower the temperature of this engine, oil is sprayed via oil squirters onto the bottom of the pistons.
A 16-valve aluminium cylinder head with a single chain-driven camshaft and Fiat's electro-hydraulic MultiAir II system is mounted on top of the block. Electro-hydraulic valve actuators manage the variable valve timing and lift technology used by the MultiAir.
The MultiAir II system controls the intake valve's movements in both the open and closed states on the 2.4 litre Tigershark. The camshaft uses mechanical buckets that are polished and shimless to regulate the exhaust valves.
Each cylinder has its own intake cam lobe on the intake side. The followers of roller-finger have an effect on those lobes. Each finger follower controls a piston that has a hydraulic brake and lash adjustment.
This piston pulls oil into the valve assembly through a solenoid. When the solenoid is turned on, the valve detaches from the cam and closes under the force of the valve spring.
The valves follow a typical engine's cam profile when the solenoid is closed, this is how the MultiAir system controls valve lift and timing.
The Chrysler2.4 Tigershark is perfectly tuned for both fuel efficiency and performance due to MultiAir technology. An aluminium headcover guards the cylinder head.
Two spark plugs with coil-on-plug ignition and a standard multiport fuel injection system are included in the engine's design. The plastic intake manifold features an acoustic cover to prevent excessive noise.
On the Tigershark engine, a two-stage oil-pressure relief system keeps oil pressure at ideal levels while requiring less engine oil pumping.
2.4L Tigershark MultiAir Engine Specs
Manufacturer: Chrysler Plant in Dundee, Saltillo (Mexico); Trenton, Michigan (USA)
Production years: 2012-present
Cylinder block material: Aluminium
Cylinder head material: Aluminium
Fuel type: Gasoline
Fuel system: Multi-point fuel injection
Number of cylinders: 4
Valves per cylinder: 4
Valvetrain layout: SOHC
Bore: 88.0 mm (3.46 in)
Stroke: 97.0 mm (3.82 in)
Displacement: 2,360 cc (144 cu in)
Type: Four-stroke, naturally aspirated
Compression Ratio: 10.1:1
Power: 178-184 hp (133-137 kW) at 6,250-6,400 rpm
Torque: 171-179 ft-lb (232-243 Nm) at 3,800-4,800 rpm
Firing order: 1-3-4-2
Engine oil weight: SAE 0W-20
Engine oil capacity: 5.2 litres (5.5 qt) with oil filter
Oil change interval: 10,000 miles (15,000 km) / 12 months
Applications: Chrysler 200, Dodge Dart, Jeep Cherokee, Jeep Renegade, Jeep Compass, Ram ProMaster City, Fiat 500X, Fiat Toro