Audi A4: Coolant Pump, Removing and Installing
Removing
- Remove the engine cover. Refer to → Servicing - 4-Cylinder 2.0L 4V TFSI Engine; Rep. Gr.10; Engine Cover; Engine Cover, Removing and Installing.
- Drain the coolant. Refer to → Chapter "Coolant, Draining and Filling".
- Disconnect the connectors -2 to 5-.
Note
Ignore item -1-.
- Remove the bolt -1- and move the bracket -2- with the engine wiring harness to the side.
All additional procedures are described under: → Servicing - 4-Cylinder 2.0L 4V TFSI Engine; Rep. Gr.19; Coolant Pump/Coolant Thermostat; Coolant Pump, Removing and Installing.
Installing
Additional procedures:
- Connections and wire routing. Refer to → Wiring diagrams, Troubleshooting & Component locations.
Note
Used coolant cannot be used again.
- Fill with coolant. Refer to → Chapter "Coolant, Draining and Filling".
- Install the engine cover. Refer to → Servicing - 4-Cylinder 2.0L 4V TFSI Engine; Rep. Gr.10; Engine Cover; Engine Cover, Removing and Installing.
Coolant Pump Toothed Belt, Removing and Installing
Removing
- Remove the engine cover. Refer to → Servicing - 4-Cylinder 2.0L 4V TFSI Engine; Rep. Gr.10; Engine Cover; Engine Cover, Removing and Installing.
- Drain the coolant. Refer to → Chapter "Coolant, Draining and Filling".
- Remove the bolt -1- and move the bracket -2- with the engine wiring harness to the side.
- Lift the clamps -1 and 2- and remove the coolant hoses and push them to the side.
All additional procedures are described under: → Servicing - 4-Cylinder 2.0L 4V TFSI Engine; Rep. Gr.19; Coolant Pump/Coolant Thermostat; Coolant Pump Toothed Belt, Removing and Installing.
Installing
Additional procedures:
- Connections and wire routing. Refer to → Wiring diagrams, Troubleshooting & Component locations.
- Connect the coolant hose to the connector coupling. Refer to → Fig. "Connect the Coolant Hose to the Connector Coupling".
Note
Used coolant cannot be used again.
- Fill with coolant. Refer to → Chapter "Coolant, Draining and Filling".
- Install the engine cover. Refer to → Servicing - 4-Cylinder 2.0L 4V TFSI Engine; Rep. Gr.10; Engine Cover; Engine Cover, Removing and Installing.
Engine Temperature Control Actuator -N493-, Removing and Installing
Removing
- Drain the coolant. Refer to → Chapter "Coolant, Draining and Filling".
- Lift up the clamps -arrows- and remove and free up the coolant hoses.
- Disconnect the connector -1- for the Engine Coolant Level Warning Switch -F66-.
- Remove the bolt -2- and remove the coolant expansion tank -3-.
All additional procedures are described under: → Servicing - 4-Cylinder 2.0L 4V TFSI Engine; Rep. Gr.19; Coolant Pump/Coolant Thermostat; Overview - Coolant Pump/Coolant Thermostat.
Installing
Additional procedures:
- Connect the coolant hose to the connector coupling. Refer to → Fig. "Connect the Coolant Hose to the Connector Coupling".
Note
Used coolant cannot be used again.
- Fill with coolant. Refer to → Chapter "Coolant, Draining and Filling".
Engine Coolant Temperature Sensor -G62-, Removing and Installing
All procedures are described under: → Servicing - 4-Cylinder 2.0L 4V TFSI Engine; Rep. Gr.19; Coolant Pump/Coolant Thermostat; Engine Coolant Temperature Sensor on Radiator OutletG83, Removing and Installing.
Engine Coolant Temperature Sensor on Radiator Outlet -G83-, Removing and Installing
Procedure
- The engine is cold.
- To reduce the residual pressure in the cooling system, briefly open the coolant expansion tank cap -1- by releasing the retainer in the direction of -arrow-.
- Remove the front noise insulation. Refer to → Body Exterior; Rep. Gr.66; Noise Insulation; Overview - Noise Insulation.
- Disconnect the connector -2-.
Note
- Place a cloth underneath to catch any escaping coolant.
- Replace the O-ring after removing.
- Insert the new Engine Coolant Temperature Sensor on Radiator Outlet -G83- immediately in the connection to prevent coolant loss.
- Open the clamp -1- and remove the Engine Coolant Temperature Sensor on Radiator Outlet -G83-.
Install in reverse order of removal and note the following:
- Check the coolant level.
Tightening Specifications
- Refer to → Body Exterior; Rep. Gr.66; Noise Insulation; Overview - Noise Insulation.
Coolant Pipes
All procedures and components are described under: → Servicing - 4-Cylinder 2.0L 4V TFSI Engine; Rep. Gr.19; Coolant Pipes.
