Vehicles using EJ-DE engine list:

Engine EJ-DE is known for reliability but common issues include valve wear and head gasket leaks. Diagnosis involves checking for oil consumption, overheating, or coolant loss. Prevent valve wear by regular oil changes using recommended grades and avoid prolonged high RPMs. Head gasket failure can be prevented by maintaining cooling system health—regular coolant flushes and radiator checks. If overheating occurs, inspect thermostat and water pump promptly. Solutions include valve adjustment or replacement if noisy valves persist, and head gasket replacement if leaks or compression loss are detected. Regular maintenance and timely repairs ensure longevity of the EJ-DE engine in the listed Daihatsu and Perodua models.