Engine Overview and Common Failures
The weight of the H27A engine assembly is 175 kg. The engine number H27A is located at the junction of the block and the oil pan. The timing belt system has a short lifespan and the drive system of this engine, consisting of three chains and three hydraulic tensioners, is complex and not very reliable. These components are demanding in terms of quality and oil change schedule. Attempts to save on maintenance will result in the tensioner jamming and the chain skipping.
Oil consumption becomes more noticeable around 150,000 km of mileage and gradually increases. The main cause of oil consumption is not worn rings or valve caps, but rather the clogging of the valve cover oil passages, which serve as part of the crankcase ventilation system.
Oil leaks are so bothersome that it is worth mentioning them separately. Oil usually leaks through the crankshaft seals or from under the front engine cover, as well as through the gaskets of the oil channel at the junction of the block with the crankshaft bed and the oil pan.
Other drawbacks of the engine include the unreliable mass air flow sensor and the EGR valve, which tends to quickly clog, along with its connecting pipe often breaking.