AR20.10-W-1290-02H | Remove/install connection piece of coolant pump to cylinder head | ||
Danger! | Risk of injury to skin and eyes caused by scalding from contact with hot coolant spray. Risk of poisoning caused by swallowing coolant. | Do not open cooling system unless coolant temperature is below 90°C. Open cap slowly and release the pressure. Do not pour coolant into beverage containers. Wear protective gloves, protective clothing and safety glasses. |
Modification notes
Coolant pump, coolant thermostat
Number | Designation | Engines | ||
BA20.10-N-1003-01C | Bolt, connection piece of coolant pump to cylinder head | Nm | 50 | |
W20.10-1011-11
1 Detach coolant hose (2) at coolant manifold (1).
Installation: Replace sealing rings.
2 Loosen coolant hoses (3) and push back onto the coolant lines (4).
3 Disconnect control line (5) from electropneumatic pressure converter (EPW) (Y87) to turbocharger at connector hose.
Only for code (MS8) Natural gas engine.
W20.10-1012-11
4 Detach coolant hose (6) at connection piece (10).
5 Disconnect electrical connector of engine wiring harness (7) from coolant temperature sensor (B65).
6 Detach engine wiring harness (7) at control line (5).
7 Disconnect line (5) to the turbocharger at connector hose and remove.
Only for code (MS8) Natural gas engine.
8 Unscrew bolts (8) and take off crankcase ventilation line (9).
9 Pull connection piece (10) together with coolant manifold (1) upwards and out of connection fitting (11).
Installation: Install new seal in connection piece (10).
10 Pull connection fitting (11) out of the coolant pump.
Installation: Install new connection fitting (11).
11 Install in the reverse order.