Vehicles using EJ22E engine list:

Engine EJ22E

Symptoms:
- Oil leaks, especially from valve cover gaskets and camshaft seals
- Overheating or coolant loss without visible leaks
- Rough idling or misfires
- Excessive oil consumption
- Engine knocking or unusual noises

Diagnosis:
- Inspect valve cover gaskets and camshaft seals for oil seepage
- Check coolant levels and pressure test the cooling system for leaks, including the head gasket
- Perform a compression test to identify cylinder sealing issues
- Examine spark plugs and ignition components for fouling or wear
- Listen for abnormal engine noises indicating bearing wear or timing issues

Fixes:
- Replace worn or leaking valve cover gaskets and camshaft seals to stop oil leaks
- Repair or replace faulty radiator, hoses, or water pump to address overheating
- If head gasket failure is detected, perform a head gasket replacement and inspect the cylinder head for warping
- Clean or replace spark plugs and ignition wires to resolve misfires
- Change engine oil regularly and use recommended oil grade to reduce oil consumption
- Address engine knocking by checking timing and replacing worn bearings or components as needed

Prevention:
- Regularly check and maintain proper coolant levels and quality to prevent overheating
- Change engine oil and filter at recommended intervals to ensure lubrication and reduce wear
- Inspect and replace aging gaskets and seals before leaks develop
- Use quality fuel and maintain ignition system to avoid misfires and deposits
- Monitor engine temperature and address any overheating signs promptly to avoid severe damage

By following these guidelines, owners of Subaru Legacy/Outback 2.2 (1994–1998) with the EJ22E engine can maintain reliable performance and extend engine life.