Oil Circuit in Cold Engine

1. Rocker arm
2. Pushrod
3. Piston
4. Valve lifter
5. Oil suction tube
6. Pressure relief valve
7. Bypass valve
8. Camshaft
9. Crankshaft
10. Oil pump
11. Counter-pressure line
12. Oil line to Bearing 4
13. Oil temperature sensor
14. Oil pressure switch
15. Oil cooler (repositioned back in sketch for better view)
16. Bypass oil filter