Camshafts and camshaft adjusters, removing and installing: Installing:

Install camshaft adjuster in reverse order of removal but note the following:

• Replace half-round cap.
• Replace rubber-metal gasket for camshaft adjuster and coat the hatched area lightly with sealer AMV 100 001 02. See Fig 1.
  CAUTION: Part numbers are listed for reference only. Always check with your Parts department for latest information.
Fig 1: Identifying Camshaft Adjuster Hatched Area
Courtesy of AUDI OF AMERICA, INC.
• Place drive chain on camshaft sprockets as follows:

When using the old chain: 

• Align paint markings -arrows-.
Fig 2: Aligning Camshaft Drive Chain And Sprocket Paint Markings (Using Old Chain)
Courtesy of AUDI OF AMERICA, INC.

When using a new drive chain: 

• The distance between camshaft markings -A- and -B- must be 16 rollers of the drive chain. Position rollers 1 and 16 according to illustration.
  • Chain rollers 1 and 16 are offset by 1/2 tooth width to the left in relation to markings -A- and -B-.
Fig 3: Aligning Camshaft Drive Chain And Sprockets (Using New Chain)
Courtesy of AUDI OF AMERICA, INC.

Continuation: 

• Insert camshaft adjuster next to chain (requires second technician).
• Place camshafts with drive chain and camshaft adjuster into cylinder head.
• Lubricate running surfaces of camshafts with oil.
  NOTE: Be sure locating dowels for bearing caps and camshaft adjuster are installed in cylinder head.
• Tighten camshaft adjuster (observe locating dowels).
• Install bearing caps 3, 5, and 7 according to markings.
• Tighten bearing caps 3, 5, and 7 of intake and exhaust camshafts diagonally (observe locating dowels).
• Install remaining bearing caps of intake and exhaust camshafts and tighten them from inside to outside in alternating diagonal sequence.
• Tighten camshaft adjuster -10- (pay attention to alignment bushings).
  Fig 4: Identifying Camshaft Bearing Caps And Camshaft Adjuster

  Courtesy of AUDI OF AMERICA, INC.
• Remove bracket for chain tensioner 3366.
• Check camshafts for correct adjustment.
• Both markings at camshafts must align with markings on bearing caps -arrows-.
  NOTE: To make sure that alignment is correct, turn camshaft in direction of engine operation.
Fig 5: Checking Camshafts For Correct Alignment
Courtesy of AUDI OF AMERICA, INC.
• Coat gray area of double bearing cap -6- and outer bearing cap -1- next to camshaft adjuster lightly with sealer AMV 100 001 02. See Fig 6. Install bearing cap with camshaft seals (observe locating dowels).
  Fig 6: Identifying Gray Area Of Double Bearing Cap And Outer Bearing Cap

  Courtesy of AUDI OF AMERICA, INC.
• Install remaining bearing caps (observe locating dowels).
  CAUTION: Part numbers are listed for reference only. Always check with your Parts department for latest information.
• Tighten remaining bearing caps.
• Install toothed belt (adjust timing). See INSTALLING .
  NOTE: Observe all notes regarding removing and installing toothed belt. See TOOTHED BELT, REMOVING AND INSTALLING .
• Install cylinder head cover. See CYLINDER HEAD COVER, LEFT, REMOVING AND INSTALLING .
  NOTE:

  • DO NOT immediately start engine after installing camshafts. Wait for at least 30 minutes, otherwise valves may hit pistons. The hydraulic lifters have to settle first.
  • After completing work on the valve train, carefully turn crankshaft by hand for two revolutions to be sure that no valve contacts a piston.