Removal and Installation

Removal
1 Drain coolant. Service and Repair
2 Slacken V-belt for coolant and power steering pump and remove.
3 Remove coolant hoses between coolant pump and upper and lower coolant tanks.






4 On model 107. unscrew fan shroud from radiator top, lift out of the bottom retaining straps and place over the fan.
On model 126, pull off flat shaped springs (arrows), in upward direction, lift fan shroud out of retaining straps at the bottom and place over the fan.





5 Unscrew fastening screws (arrow) for viscofan clutch and remove viscofan clutch with fan together with fan shroud.
6 Remove distributor.

7 On engines 116.960,116.961, 117.960 and 117.961 unscrew threaded pin (arrow).
8 Remove inlet connection of coolant pump.





Engines 116.965, 117.967 and 117.968:
If screwed into inlet connection, pull single plug of electric line from temperature transmitter for coolant temperature indicator and from temperature switch for supplementary fan. Loosen front hose clamp (12) on coolant hose (11), unscrew fastening screws (4, 5 and 7) and remove inlet connection (6) with sealing ring and spacer ring.





116.962, 116.963 and 117.963:
Plug single plug of electric line from temperature transmitter (5) and, if screwed in, from temperature switch (3). If installed, disconnect vent hose on connecting pipe (arrow). Loosen hose clamp (10), unscrew fastening screws (1) and remove inlet connection (8) with sealing ring and coolant thermostat.





9 On vehicles with hydropneumatic suspension, unscrew hollow screw (5) on hydraulic oil pump and put high pressure line (6) aside.
10 Remove vibration damper. Service and Repair





11 Unscrew fastening screws (1) and remove coolant pump.

Installation:
12 Carefully clean sealing surfaces and install coolant pump with new gasket. Tighten fastening screws to 25 Nm.
13 For further installation proceed vice versa to items 2-10.
Check seal or sealing ring for inlet connection and renew if required.
Tighten fastening screws of inlet connection and of viscofan clutch to 25 Nm.
14 Check firing point and adjust if required.
15 Fill with coolant.
16 Check cooling system for leaks by means of pressure test with tester (1.0 to 1.3 bar gauge pressure).