Engine Oil Check Valve: Service and Repair

- Remove oil filter.
- Pry circlip (17) out with a screwdriver.
- Remove valve seat (12), valve cone (14) and compression spring (15).
- Install valve seat (12) with extended guide with valve cone (14) and compression spring (15) (2nd version).

NOTE: Standard set oil return check valve with improved sealing properties as of engine no.:
119.970 12 029 923
119.971 12 015 069
119.972 12 002 097
119.974 12 006 973
119.975 12 007 964