Vehicles using EJ20T engine list:

Engine EJ20T

Symptoms:
- Excessive oil consumption and blue smoke from the exhaust
- Loss of power or poor turbo spool-up
- Overheating or coolant leaks
- Engine knocking or unusual noises
- Check engine light illumination with misfire or sensor fault codes

Diagnosis:
- Inspect turbocharger for shaft play, oil leaks, and compressor wheel damage
- Perform a compression and leak-down test to check piston rings and head gasket integrity
- Check for intake and intercooler leaks causing boost loss
- Examine coolant system for leaks, radiator condition, and thermostat operation
- Scan ECU for stored fault codes related to ignition, fuel, or sensors
- Inspect timing belt condition and tensioner operation

Fixes:
- Replace worn turbocharger or rebuild if shaft play or oil seal failure is detected
- Repair or replace head gasket and address any cylinder wall damage if compression is low
- Fix intake leaks by replacing hoses, clamps, or intercooler components
- Flush and repair cooling system components; replace thermostat and radiator if necessary
- Replace faulty ignition coils, spark plugs, or sensors triggering misfires
- Change timing belt and tensioner at recommended intervals to prevent catastrophic engine damage
- Use high-quality synthetic oil and maintain regular oil change intervals to reduce oil consumption

Prevention:
- Adhere strictly to maintenance schedules, especially timing belt replacement every 60,000 to 100,000 km
- Use recommended oil grades and change oil frequently to protect turbo and engine internals
- Avoid prolonged idling and allow the turbo to cool down after spirited driving to prevent oil coking
- Regularly inspect and maintain cooling system to prevent overheating
- Monitor boost pressure and engine performance to catch issues early before severe damage occurs