In a direct-injection engine, fuel is sprayed directly into the combustion chamber rather than over the back of the intake valves. Because there is no fuel mist to wash away oil vapors coming from the positive crankcase ventilation (PCV) system, sticky carbon deposits bake onto the intake valves.
Replace the water pump with a metal-impeller version. Use an OEM or high-quality aftermarket thermostat housing. Replace the cap annually as cheap maintenance. Inspect coolant hoses every oil change. ep6dt engine problems
Always use high-octane premium petrol to minimize carbon buildup and engine knock. In a direct-injection engine, fuel is sprayed directly