Engine Coolant Temperature Sensor on Radiator Outlet -G83-, REMOVING AND INSTALLING

Procedure 

• The engine is cold.
  Fig 1: Coolant Expansion Tank

  Courtesy of AUDI OF AMERICA, LLC

-- To reduce the residual pressure in the cooling system, briefly open the coolant expansion tank cap -1- by releasing the retainer in direction of -arrow-.

-- Reinstall the cap until it engages.

-- Remove the front right wheel spoiler. Refer to OVERVIEW - FRONT WHEEL HOUSING LINER .

-- Remove the front noise insulation. Refer to NOISE INSULATION, REMOVING AND INSTALLING .

-- Loosen the hose clamp -arrow- and remove the air duct hose from the air duct pipe.

Courtesy of AUDI OF AMERICA, LLC

-- Disconnect the connector -1-.

Fig 2: Engine Coolant Temperature Sensor on Radiator Outlet -G83- Component Location

Courtesy of AUDI OF AMERICA, LLC

-- Place a cloth underneath to catch any escaping coolant.

-- Remove the bolt -2- and the Engine Coolant Temperature Sensor on Radiator Outlet -G83-.

TIP: 

If an O-ring remains in the cylinder block, remove the O-ring with a wire.

• Replace the O-rings after removing them.
• Secure all hose connections with hose clamps that match the ones used in series production.

-- Insert the new engine coolant temperature sensor immediately so that as little coolant is lost as possible.

-- Check the coolant level. Refer to COOLANT, DRAINING AND FILLING .

Tightening Specifications 

• Refer to OVERVIEW - COOLANT PUMP/COOLANT THERMOSTAT .
• Refer to OVERVIEW - CHARGE AIR HOSE CONNECTIONS .
• Refer to OVERVIEW - FRONT WHEEL HOUSING LINER .
• Refer to OVERVIEW - NOISE INSULATION .