Auxiliary Water Pump: Service and Repair
Removing and installing coolant circulation pump
Shown On Model 208.3:
Shown On Model 208.4:
DANGER:
- Risk of injury to skin and eyes from scalding with hot coolant which splashes out. Risk of poisoning from swallowing coolant.
- Do not open cooling system unless coolant temperature is below 90 degrees C. Open cap slowly and release the pressure. Do not pour coolant into beverage bottles.
- Wear protective gloves, protective clothing and eye protection.
1 Relieve pressure in the coolant circuit
NOTE: In order to achieve this, turn coolant compensation tank closure cap to locking position 1.
2 Remove front engine compartment paneling
3.1 Remove right inner fender wheel arch cover
- Model 208.3
3.2 Remove left inner fender wheel arch cover
- Model 208.4
4 Unclip heater unit cover (5)
5 Unclip coolant pump coupling (8)
NOTE: Installation: Coupling is coded.
6 Undo attachment (17) and disconnect coolant pump bracket (13)
- Stationary heater coolant circulation pump screw: 4.0 N.m
NOTE: Installation: Attach coolant pump bracket (13) first.
7 Disconnect coolant supply hose (4)
See "Special Tools" given below.
8 Disconnect coolant pump (A6m1) from coolant hose (4)
NOTE: Collect escaping coolant and return to coolant compensation tank following installation.
9 Install in the reverse order
10 Bleed the coolant circuit after installing the heater unit.
Testing
DANGER:
- Risk of explosion from fuel vapors, risk of poisoning from inhaling combustion gases and risk of injury from burns during and after operation of heater unit.
- Do not operate stationary heater, auxiliary heater or engine with heater booster in closed areas or when refueling. Allow heater unit to cool down after operation and wear protective gloves.
11 Start up stationary heater.
NOTE:
If the heater unit (A6) switches off independently before reaching its operating temperature and cannot be re-started, a malfunction blockage is present (continue with).
- Eradicate malfunction blockage.
12 Inspect cooling system for leaks.
Special Tools
Clamp, P/N# 000 589 40 37 00:
