Radiator and Coolant Fan Overview

Radiator and Coolant Fan Overview


Risk of scalding due to hot steam and hot coolant.

• The coolant system is under pressure when the engine is warm.

• Cover the coolant reservoir cap with a cloth and then open it slowly to release the pressure.


Danger of personal injury due to the coolant fan turning on by itself.

• Disconnect the connectors before working near the fan shroud.

• When the engine is warm the cooling system is under pressure. If necessary release pressure before commencing repair work.

• Secure all hose connections using hose clamps appropriate for the model, refer to the Parts Catalog.

• Hose clip pliers (V.A.G 1921) or spring-type clip pliers (VAS 5024 A) are recommended for installing spring-type clamps.

• Always replace gaskets and seals.

• If there are small impressions on the fins, refer to => [ Coolers, Condensers and Charge Air Coolers, Installing ] Coolers, Condensers and Charge Air Coolers, Installing.

• Arrows on coolant pipes and coolant hoses must line up across from each other.






1 Coolant Fan (V7)

• Removing and installing, refer to => [ Coolant Fan (V7) and Coolant Fan 2 (V177) ] Coolant Fan (V7) and Coolant Fan 2 (V177)

2 Nut

• 10 Nm

3 Fan Shroud

4 Lower Coolant Hose

• To the connection for the coolant thermostat

5 Clamp

6 Engine Coolant Temperature Sensor (G62)

• Removing and installing, refer to => [ Engine Coolant Temperature Sensor (G62) ] Service and Repair

7 O-ring

• Replace if damaged

8 Upper Coolant Hose

• From the coolant pump

9 O-ring

• Replace if damaged

10 Bolt

• 5 Nm

• On the charge air cooler

11 Radiator

• Removing and installing, refer to => [ Radiator ] Radiator

• After replacing, replace entire amount of coolant.

12 Nut

• 10 Nm

13 Bolt

• 5 Nm

• On the radiator

14 Radiator Fan 2 (V177)

• Removing and installing, refer to => [ Coolant Fan (V7) and Coolant Fan 2 (V177) ] Coolant Fan (V7) and Coolant Fan 2 (V177)

Connect the Coolant Hose to the Coupling





- Remove the old O-ring - 2 - in the coolant hose - 3 -.

- Coat the new O-ring with coolant and install it in the coolant hose.

- Press the coolant hose onto the connection - 1 - until it engages audibly.

- Press the coolant hose on again and pull to make sure the connection is engaged correctly.

Radiator Identification Sensor





- Arrow - indicates direction of travel

- A - Radiator

- B - Radiator Identification Sensor

• The radiator identification sensor can be replaced only with the radiator.