It's recommended to change the oil in time following the maintenance schedule and sometimes even more frequently. The problem with the oil system can cause serious damages. This is typical for engines with above-average mileage, which more likely have stuck/seized piston rings. Most problems for 3.3L MPI engines are related to high oil consumption. Hyundai Kia 3.3L V6 Engine Problems and Reliability Turbochargers operate in connection with the new Dual CVVT system, which provides up of 85 degrees of phasing compare to 50 degrees of cam phasing inside the previous Lambda engines. Hot compressed air at first goes through the air-to-air intercooler and then into an aluminum intake manifold. A boost air comes from two single-scroll turbochargers (by one for each cylinder bank) equipped with electronic wastegate actuators. Like the G6DH, the turbo engine has the high-pressure direct-injection system (GDI), but the new system functions at 200 bar (2,900 psi) of max-pressure due to increased fuel demand. The cooling system now is equipped with an electronically controlled thermostat for precise engine temperature control. Water jackets of new heads have increased volume for better cooling. The engineers installed exhaust valves with a sodium-filled stem and head.
The engine received new cylinder heads with the integrated and water-cooled exhaust manifold. The G6DP is an all-aluminum 3.3-liter V6 direct-injected twin-turbo engine firstly used in 2016 Genesis G80 and, a year later, in the Kia Stinger. The most powerful and advanced version is the 3.3L T-GDI Lambda II engine (labeled as G6DP). Due to the high power, the 3.3 GDI engines are installed on large SUVs and crossovers of the Korean manufacturer and also in the cars of the luxury brand Genesis. The electronically controlled direct injectors spray compressed fuel into the combustion chambers directly for the more precisely controlled and efficient combustion process. The fuel pump is actuated by an additional cam on the exhaust camshaft and provides the max pressure up to 150 Bar. The engine is equipped with one high-pressure pump which mounted on top of one cylinder head (the front head of transverse engines or the right cylinder head of longitudinal engines). The new cylinder heads still have 4 valves per cylinder (two intake valves and two exhaust valves) and no hydraulic cam followers, chain-driven double overhead camshafts with Dual CVVT system, but also new holes and mounting points for the high-pressure direct fuel injectors. The new engine got a redesigned lightweight crankshaft with optimized balancing weights and a chain-driven variable displacement oil pump. The GDI version of 3.3 Lambda II engine (the G6DH) is produced since 2011.
Hyundai sonata direct fuel injector series#
Visually, it is easy to distinguish this series with a new timing chain cover and plastic cylinder head covers. The Lambda II MPI series has Dual CVVT - variable intake and exhaust valve timing. Slightly improvements over its predecessor allowed G6DF engine to increase maximum output performance and at the same time to be more environmentally friendly. The G6DF or 3.3L MPI Lambda II engine appeared in 2009. The throttle body is already electronic - the accelerator pedal is electronically connected to the throttle valve. The intake manifold is made from plastic for weight savings. The fuel system delivers fuel for combustion using a conventional way of spraying it by nozzles (injectors) into intake ports before the intake valves. The G6DB engine is equipped with the multi-port fuel injection system. In this case, the adjustment is required every 60,000 miles (100,000 km).Ĭylinder heads are covered by aluminum headcovers. The valves are actuated via solid buckets (there are not hydraulic cam followers). Lambda engines use two timing chains (by one for each head) and variable valve timing (Hyundai's CVVT) on the intake side only. There are lightweight aluminum cylinder heads with four valves per cylinder and two overhead camshafts for each cylinder bank. The 3.3L MPI Lambda engine is built around an aluminum open-deck type engine block.
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