Vehicles using ET3J4 engine list:

Engine ET3J4 commonly faces issues such as timing chain wear, leading to rattling noises and potential misfires. Regularly inspect the timing chain tensioner and replace it if noisy. Carbon buildup on intake valves can cause rough idling; use quality fuel and periodic intake cleaning to prevent this. Cooling system leaks and thermostat failures are also reported; monitor coolant levels and replace the thermostat every 60,000 km. For diagnosis, listen for unusual engine noises and scan for misfire codes. Preventive maintenance, including timely oil changes with recommended grades, helps prolong engine life. Address issues early to avoid costly repairs.