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.

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