The Theta-II engine is known for oil leaks, often due to problems with the valve cover gasket or oil pan gasket.

Some owners report engine stalling issues, which could be due to a faulty crankshaft position sensor or issues with the fuel system.

The engine may experience timing chain tensioner problems, leading to a noisy engine and potential timing chain failure.

This engine is known for excessive oil consumption, often due to piston ring wear or other internal engine components.

Direct injection engines like the Theta-II GDI can suffer from carbon buildup on intake valves, leading to performance issues and rough idling.

Some engines develop knocking noises due to connecting rod bearing wear or issues with the fuel injection system.

Cooling system issues, such as a failing water pump or thermostat, can cause the engine to overheat.

Misfiring can occur due to faulty ignition coils, spark plugs, or fuel injectors.

The Hyundai Genesis Coupe with the G 3.8 GDI Lambda II engine is known to have higher than average oil consumption, which can lead to more frequent oil changes and potential engine damage if not monitored regularly.

The timing chain tensioner can wear out prematurely, causing a rattling noise and possibly leading to timing chain issues if not addressed promptly.

Direct Injection (GDI) engines, like the Lambda II, are prone to carbon buildup on intake valves, which can result in rough idling, reduced performance, and lower fuel efficiency.

Issues with the cooling system, such as leaks from the water pump or radiator, can lead to engine overheating if not identified and repaired in a timely manner.

Failure of the crankshaft position sensor can lead to engine stalling, poor acceleration, and difficulty starting the engine.

Ignition coil problems can cause misfires, reduced engine performance, and decreased fuel efficiency.

Clogged or malfunctioning fuel injectors can lead to poor engine performance, rough idling, and decreased fuel economy.

V-shaped engines, like the one in the 2016 Hyundai Equus, may develop oil leaks at the valve cover gaskets, rear main seal, and oil pan gasket due to the configuration and age.

The Direct Injection (GDI) system in the DOHC GDI TAU engine can lead to carbon buildup on intake valves over time, causing rough idling, misfires, and reduced performance.

The DOHC (Double Overhead Camshaft) setup can experience timing chain stretch or failure, leading to potential engine misfires or severe engine damage if not properly maintained.

V8 engines can generate significant heat, and the cooling system components (like the water pump, radiator, and thermostat) may be prone to failure, leading to overheating issues.

With eight cylinders, the ignition coils in the Hyundai Equus may wear out or fail, causing misfires, poor fuel economy, and engine hesitation.

GDI engines can experience issues with fuel injectors becoming clogged or failing, leading to poor fuel delivery and engine performance issues.

The Hyundai Genesis Coupe with the G 3.8 GDI Lambda II engine is known to have higher than average oil consumption, which can lead to more frequent oil changes and potential engine damage if not monitored regularly.

The timing chain tensioner can wear out prematurely, causing a rattling noise and possibly leading to timing chain issues if not addressed promptly.

Direct Injection (GDI) engines, like the Lambda II, are prone to carbon buildup on intake valves, which can result in rough idling, reduced performance, and lower fuel efficiency.

Issues with the cooling system, such as leaks from the water pump or radiator, can lead to engine overheating if not identified and repaired in a timely manner.

Failure of the crankshaft position sensor can lead to engine stalling, poor acceleration, and difficulty starting the engine.

Ignition coil problems can cause misfires, reduced engine performance, and decreased fuel efficiency.

Clogged or malfunctioning fuel injectors can lead to poor engine performance, rough idling, and decreased fuel economy.