Removing the temperature sensor

Remove the cap from the expansion tank.

Raise the car. Remove the lower splashguard.

Position a container under the engine drain cock. Drain the engine coolant.

Close the cock.

Install the lower splash guard.

Lower the car.

Fig 1: Identifying Expansion Tank

Courtesy of VOLVO CARS OF NORTH AMERICA.

Remove the screw holding the engine stabilizer brace to the bracket on the engine.

Undo the clamp holding the return hose for the power steering.

Remove the cross stay.

Fig 2: Identifying Plastic Hoses Between Turbocharger, Charge Air Cooler And Air Cleaner/Turbocharger

Courtesy of VOLVO CARS OF NORTH AMERICA.

Applies only to B6xx4T 

Remove the crankcase ventilation pipe from the intake manifold. Start with the cover.

Remove the plastic hoses between the turbocharger (TC) and the charge air cooler and between the air cleaner (ACL) and the turbocharger (TC).

Remove the clamp for the intake manifold at the turbocharger (TC) for cylinders 1, 2 and 3. Turn the upper section of the pipe towards the firewall.

Fig 3: Identifying Front Timing Belt Cover

Courtesy of VOLVO CARS OF NORTH AMERICA.

Remove 

• the upper timing belt cover.

  Lift up the servo reservoir and place it on top of the engine

  WARNING:

  Seal the cover for the servo reservoir. Check that no oil leaks out.

  Servo oil is highly inflammable.

• the screw for the front timing belt cover

  Applies only to B6xx4T engines  . For cars with chassis numbers 203779-  , see EXPANSION TANK

• the timing belt cover.

  Disconnect the connector for the sensor cable.

Remove the variable valve timing solenoids and place them to one side.

Remove the screw for the cable duct.

Fig 4: Identifying Thermostat Housing And Cable Duct

Courtesy of VOLVO CARS OF NORTH AMERICA.

Remove the thermostat housing with the cable duct.

Clean the mating surfaces of the cylinder block. Ensure that no dirt enters the fluid ducts.

Fig 5: Identifying Thermostat Housing And Sensor

Courtesy of VOLVO CARS OF NORTH AMERICA.

Secure the thermostat housing in a vise. Remove the sensor.