Removing and installing coolant pump - RA20001192100X(20-2100)
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:
Carrier of viscous fan clutch removed (20-3140)
Belt pulley/vibration damper removed (03-3420) .
Operation no. of operation texts and work units or standard texts and flat rates
20-1270
| Coolant hoses (4), (5) and (6) | detach, attach. |
| Connection cover at top (2) with engine lifting eye (1) | unbolt, bolt on (21 Nm). |
| Gasket (2a) | replace. |
| Model 210 with secondary air injection: retaining plate with switchover valve for secondary air injection | unbolt at coolant pump (3), bolt on. |
| Coolant pump (3) | unbolt. Coolant pump housing, see Note. |
| Sealing surfaces | clean. |
| Gasket (3a) | replace. |
| Coolant pump (3) | fit on, bolt on (21 Nm). Pay attention to different bolt lengths, see bolt diagram. |
| Cooling system | check for leaks Testing cooling system for leaks . |
Special tool
TIGHTENING TORQUE IN Nm
| Bolts of cover at top to coolant pump | 21 |
| Bolts of coolant pump to crankcase | 21 |
NOTE:
Engine 119.97
The coolant pump must not touch the timing case cover at the bottom (arrows) otherwise the attaching hose and the gasket may not be aligned and the top attaching eye may shear off. Check position of coolant pump and grind off coolant pump housing, if necessary, in the area of the arrows by about 1 mm.