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

Procedure 

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

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-- 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-.

-- Turn the cap until it locks in place.

-- Remove the right wheel housing liner front section. Refer to WHEEL HOUSING LINER .

-- Remove the front noise insulation. Refer to NOISE INSULATION .

-- Loosen the hose clamps -1 and 3-, and remove the air duct hose -2- from the air duct pipe.

Courtesy of AUDI OF AMERICA, LLC

-- Release and 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 coolant pipe, pry out 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. Refer to the Parts Information.

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

-- Install the air duct hose on the air duct pipe.

-- Check the coolant level and fill if necessary. Refer to Coolant Level, Checking .

Tightening Specifications 

• Refer to OVERVIEW - ENGINE COOLANT TEMPERATURE SENSOR 
• Refer to OVERVIEW - CHARGE AIR HOSE CONNECTIONS
• Refer to WHEEL HOUSING LINER .
• Refer to NOISE INSULATION .