Oil Pressure Regulator Valve: Service and Repair

Removal:





1 Drain engine oil.
2 On model 107, remove oil pan. On model 126, remove oil pan lower part.
3 Unscrew closing plug (10).

CAUTION: The closing plug is under pressure from the compression spring.





4 Remove compression spring (11). guide pin (12) and piston (13).

Installation:
5 Install piston (13), guide pin (12) and compression spring (11).
6 Screw in closing plug (10) with new sealing ring and tighten to 40 Nm.
7 Install oil pan or oil pan lower part with new gasket and tighten fastening screws to 10 Nm (thread M6) or 25 Nm (thread M 8).
8 Fill in engine oil.
9 Run engine, check oil pressure, check for leaks.
10 Check oil level and correct if required.