Engine Overview and Common Failures
The weight of the F4R engine according to the catalog is 139 kg. The F4R engine number is located on a plate next to the gearbox. Detonation: The early versions of the engine had a compression ratio of about 10 and were considered very reliable. However, when transitioning to EURO 5, the compression ratio was raised to 11, and then even to 11.2. Frequent use of 92-octane gasoline leads to detonation and piston damage.
Crack in the phase regulator: The problematic part of this engine is the phase regulator on the intake camshaft. Often, it starts cracking before reaching 100,000 km mileage, and replacing it is expensive.
Oil consumption: Closer to 100,000 km mileage, oil consumption often appears up to one liter per 1,000 km. The usual cause is the sticking of piston rings and hardened oil control caps.
Electrical problems: Despite being a generally reliable power unit, it constantly suffers from electrical malfunctions. Ignition coils and crankshaft position sensors are the most common components to fail.
Fluctuating RPM: Many owners of vehicles with this engine face unstable engine operation. We recommend starting with throttle body cleaning and then cleaning the injectors with specialized products.
Minor breakdowns: Another component with a relatively low lifespan in this power unit is the rear support, and there are also frequent lubricant leaks, especially from the rear crankshaft seal.