Which model of the Mistra has engine cylinder scoring?
2 Answers
Mistra engine cylinder scoring occurs in the 14th generation 1.8L model. Below is relevant information about engine cylinder scoring: 1. Causes: Engine overheating due to coolant system leakage or water shortage without timely replenishment; Severe oil deficiency caused by engine oil leakage or excessive consumption; Prolonged high-speed operation or overload operation leading to excessive temperature. 2. Definition: Engine cylinder scoring refers to apparent longitudinal mechanical scratches and abrasions on the cylinder wall within the piston ring's movement range, which may develop into adhesive wear in severe cases, resulting in difficult engine starting or spontaneous stalling.
I've been repairing Hyundai cars for ten years, and the cylinder scoring issue in the Mistra is concentrated in the 2013-2016 models with 1.8L and 2.0L engines. These Nu series engines tend to develop scratches on the cylinder walls after prolonged use, especially for owners in northern regions who frequently take short trips. When cold starts occur and the oil hasn't fully circulated yet, aggressive throttle inputs can lead to this issue. Within three to four years, you can hear rattling noises from the chassis. Last month, I worked on a 2015 2.0L model, and upon disassembly, we found severe scoring on the second cylinder that was nearly worn through. For prevention, regular oil changes with low-viscosity 30-grade oil are crucial. I've heard that post-2017 models improved this issue with redesigned piston rings.
