Removal and installation of thermostat in oil filter

Torque wrench 3/8″ square, 8-32 Nm

001 589 51 21 00

Socket 1/2″ square for valve seat ring

617 589 00 07 00

Remove functioning thermostat only at temperatures below 60 °C, since otherwise the thrust pin (a) will be pushed out.

Never pull thrust pin (a) out of wax thermostat (11), since otherwise proper function cannot be guaranteed.

-11

Removal

1 Remove oil filter (18-110).

2 Unscrew valve seat ring (17) by means of socket.

10    Compression spring

11    Thermostat

12    Control valve

13   Spring retainer

15    Compression spring

16    Return flow locking valve

17    Valve seat ring return flow locking valve

18.8-125/1 F2

3 Remove return flow locking valve (16) with com­pression spring (15), spring retainer (13), compres­sion spring (10) and thermostat (11) with control valve (12).

5    Insert thermostat (11) with control valve (12), compression spring (10), spring retainer (13) and return flow locking valve (16) with compression spring (15).

6   Tighten valve seat ring (17) by means of socket to 35-45 Nm.

7   Peen valve seat ring in both recesses on oil filter housing (arrows) by means of a cross chisel.

8    Install oil filter with new gasket (18-110).

9    Run engine at idle and check for leaks.

10   Correct oil level.

18.8-125/2 F2