Oil Filter: Service and Repair

1 Central bolts Tighten, 35 Nm
2 Seal Check, replace if necessary
3 Oil filter cover
4 O-ring Renew
5 Oil filter element Ensure use of correct element
6 Oil filter housing Clean
7 Screw fitting 1) Tighten to 40 Nm
8 Sealing ring 1) Renew
9 Gasket Renew
10 Thermostat with control valve 1) Beginning of control 110 ±4 °C, end of control (fully opened) 125 ±4 °C
11 Compression spring 1)
12 Spring retainer 1)
13 Compression spring
14 Valve cone return flow shut-off valve
15 Valve seat ring return flow shut-off valve Tighten to 40 Nm
16 Electric oil pressure transmitter
17 Sealing ring Renew
18 Spring washer 3 required
19 Hex. head bolt 3 required, tighten to 25 Nm

1) Not required on engines without air oil cooler except for subsequent installation of an oil cooler:
116.963, 117.963/968

NOTE: New oil filters are delivered with initial operation filter elements which are used on new engines up to inspection at 1000-1500 km.

These filter elements have a limited life and must be replaced with filter elements (see parts microfilm) if new filters are fitted to engines already run in.


Removal:
1 Remove oil filter cover.
2 On engines 116.961 standard version and 117.961, unscrew both oil cooler lines on oil filter housing and remove pipe elbow between oil filter and damper.
3 Pull single-plug connection of electric line for oil pressure indication in instrument cluster from oil pressure transmitter.
4 Unscrew fastening screws for oil filter and remove oil filter.





5 Remove remains of gasket from flange surface on crankcase.
First close openings (arrows) so that no remains of gasket can enter the oil ducts in the crankcase.

Installation:
6 Position the oil filter with new gasket and tighten fastening screws to 25 Nm.
7 Plug single-plug connection of electric line for oil pressure indication in instrument cluster onto oil pressure transmitter.
8 On engines 116.961 standard version and 117.961/968 and special protection vehicles, connect oil cooler lines to oil filter housing and tighten coupling nuts to 25 Nm. Install pipe elbow between oil filter and damper.
9 If necessary, replace seal of central bolt and oil filter element. Fit on oil filter cap with new O-ring and tighten central bolt to 35 Nm.
10 Run engine and check for leaks.
11 Check oil level and correct if required.