Coolant Thermostat

Coolant Thermostat

Special tools, testers and auxiliary items required

• T Bar and Socket 10 mm (3185)

• Refractometer (T10007)

• Hex Ball Socket (T10058)

• Torque Wrench (5-50 Nm) (V.A.G 1331)

• Drip Tray for VAS 6100 (VAS 6208)

• Hose Clip Pliers (VAS 6340)

Removing

• The thermostat is located inside the 4/2-way valve.

• Always replace the gaskets and seals.

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

Risk of scalding due to hot steam and hot coolant.

Reduce pressure by covering coolant reservoir cap with a cloth and carefully opening.

• Hoses are secured with spring-type clips. In cases of repair only use spring-type clips.

• Hose clip pliers (VAS 6340) are recommended for installing spring-type clamps.

• When installing coolant hoses, make sure they are free of stress and do not come into contact with other components (observe markings on coolant connections and hoses).

- Remove the engine cover. Refer to => [ Engine Cover ] Engine Cover.

- Drain the coolant. Refer to => [ Draining and Filling ] Procedures.

- Remove the charge air cooler. Refer to => [ Charge Air Cooler ] Charge Air Cooler.

- Remove the throttle valve control module with the EGR vacuum regulator solenoid valve. Refer to => [ Throttle Valve Control Module J338 ] Service and Repair.

- Remove the clip - 2 - using the pry lever - rmv outside mirror (80-200).






- Pull the oil dipstick tube out of the cylinder block and move it to the side.

- Disconnect the coolant hose - B - from the connection by opening the clamp.






- Release and disconnect the connector - 2 - from the engine coolant temperature sensor on radiator outlet.

- Remove the housing cover - 1 - from the 4/2-way valve by removing the bolts.

Installing

Install in reverse order of removal. When doing this note the following:

• Replace the O-ring.

- Do not tilt the housing cover for the 4/2-way valve when positioning it and push it downward against the spring force.

- Fill the coolant. Refer to => [ Draining and Filling ] Procedures.

Tightening Specifications