Timing Chain Guard Upper Section, Removing And Installing: Installing

• Replace the bolts that were tightened with an additional turn after removing them.
• 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.

-- Remove any old sealant from the sealing surfaces.

Fig 1: Cleaning Sealing Surfaces

Courtesy of AUDI OF AMERICA, LLC

-- Remove the sealant residue on the timing chain cover -1- and cylinder head using a rotating plastic brush, for example.

-- Clean any oil or grease off the sealing surfaces.

• Be sure to check the expiration date of the sealant.
  Fig 2: Cut Tube Nozzle At Front Marking

  Courtesy of AUDI OF AMERICA, LLC

-- Cut the tube nozzle at the front marking (tube nozzle diameter: approximately 2 mm).

• Sealant bead thickness: 3.0 mm

-- Apply the sealant bead -arrow- on the clean sealing surface of the cylinder bank 1 timing chain cover (right).

Courtesy of AUDI OF AMERICA, LLC

-- Apply the sealant bead -arrow- on the clean sealing surface of the cylinder bank 2 timing chain cover (left).

Courtesy of AUDI OF AMERICA, LLC

• Install the timing chain cover within five minutes after applying the sealant.

-- Push the timing chain cover carefully on the alignment sleeves on the cylinder head but do not press on the sealant bead.

• The sealant must not get into the threaded holes.

-- Install all bolts for the timing chain cover first by hand and then tighten.

Further installation is performed in reverse order of removal, while noting the following:

-- Install the rear high pressure pipe. Refer to HIGH PRESSURE PIPE, REMOVING AND INSTALLING .