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

Courtesy of AUDI OF AMERICA, LLC

-- Release the retainers -B arrows- and open the cover -1- -arrow A-.

• 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 -arrow-.

-- Reinstall the cap until it engages.

-- 2.9L engine: remove the right front wheel spoiler. Refer to OVERVIEW - FRONT WHEEL HOUSING LINER .

-- 3.0L Engine: remove the right air intake grille. Refer to FRONT BUMPER .

-- Disconnect the connector -1-.

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

-- Remove the bolt -2- and the Engine Coolant Temperature Sensor on Radiator Outlet -G83-. (Shown on vehicle with 3.0L engine).

TIP:

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

• Replace the O-rings after removing them.

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

-- 3.0L Engine: install the air intake grille. Refer to FRONT BUMPER .

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