How to change the rear timing chain , tensioner and phaser rings on your 2005-2009 Audi a4 2.0l TFSI. If your audi has a rattle when first started, I would check this out first.

Torque specs
Head cover 10Nm (7 ft-lb) Tighten from center out in a clockwise direction
Rear housing bolt 10Nm (7 ft-lb)
N205 mounting bolt 4Nm (35 in-lb)
Vacuum pump bolt 10Nm (7 ft-lb)
Camshaft adjuster (Phaser) 20Nm plus additional 45deg
Chain Tensioner 10Nm (7 ft-lb)
Cam Bearing bracket ( Cam Girdle ) 8Nm plus additional 90deg