GM L3B engine

GM L3B engine
Overview
Manufacturer	General Motors
Production	2018-
Layout
Configuration	I4
Displacement	2.7 L (2,727 cc)
Cylinder bore	92.25 mm (3.63 in)
Piston stroke	102.00 mm (4.02 in)
Cylinder block material	380 T5 Cast Aluminum
Cylinder head material	356 T5 Cast Aluminum
Valvetrain	DOHC
Compression ratio	10.0:1
RPM range
Max. engine speed	6100 rpm
Combustion
Turbocharger	Single BorgWarner
Fuel system	Gasoline direct injection
Fuel type	Gasoline
Oil system	Wet sump
Cooling system	Water cooled
Output
Power output	310 hp (231 kW)
Torque output	348 lb⋅ft (472 N⋅m)

The GM L3B engine is an all-new engine introduced in the 2019 Chevrolet Silverado. Production takes place at GM's Spring Hill Manufacturing.

In addition to GM's active fuel management, start-stop system and variable valve timing; which are already featured on GM's other full-size pickup truck engines. This engine also features GM's Intake Valve Lift Control which has 3 different intake cam profiles that are electromagnetically-actuated to provide the best fuel economy and performance at a wider range of operating conditions.

The engine is the first GM truck engine to feature an active thermal management system: consisting of an electrically-driven water pump and a 3-way rotary valve, which allows the engine to maintain proper operating temperatures and quicker warm-ups. As well as a continuously variable oil pump help to lower parasitic losses as well as providing proper lubrication as well as cooling to the engine, especially under high-load conditions.

Turbo

The BorgWarner developed turbo can produce up to 22 psi (2 bar) of boost thanks in part to its unique dual volute and variable geometry design. Instead of two side-by-side exhaust passages like on a regular twin-scroll turbocharger, in this design the two exhaust passages are concentric and allow for better use of the exhaust pulse energy.