Removing and installing coolant thermostat - RA20001201100X(20-1100)
WARNING: This page does not describe the selected car, but rather 42 other vehicles, including the 1999 Mercedes-Benz S600, 1999 Mercedes-Benz S500, 1999 Mercedes-Benz S420, 1999 Mercedes-Benz S320, and 1999 Mercedes-Benz CL600. However, it is still accessible from the selected car via links, so may be relevant.
Preceding work:
Operation no. of the operation texts and work units or standard texts and flat rates
20-2460-2482
| Coolant | drain from radiator (20-4200) . |
| Fan shroud ring | take off, place over fan, fit on. |
| ensure correctly located in the fan shroud when installing. | |
| Coolant hoses (1 and 2) | take off, fit on. |
| Coolant thermostat housing cover (3) | take off, fit on (9 Nm). |
| Coolant thermostat housing cover (3) | swivel forward by 90°. |
| Temperature sensors (4 and 5) | unscrew, screw on. |
| Installation note Seals (4a and 5a) |
replace according to condition. |
| Holder (6) | unscrew, screw on (21 Nm). |
| Coolant thermostat housing cover (3) | remove, install. |
| Coolant thermostat (7) | remove from coolant thermostat housing cover (3), install. |
| Installation note The profile plate (7a) for the coolant must catch |
in the recesses (3a) on the coolant thermostat thermostat housing cover (3). |
| Sealing ring (8) | replace. |
| Installation note The ball valve (arrow) in the coolant thermostat (7) |
should be positioned at the highest point. |
| Coolant | pour in Draining, pouring in coolant - anti-freeze protection table . |
| Cooling system | check for leakage Testing cooling system for leaks . |
Special tool
The coolant thermostat housing (9) is sealed to the coolant pump (10) with an O-ring (arrow). Replace O-ring (arrow) in case of leakage.