Pistons, Removing And Installing: Installing
Install in reverse order of removal and note the following:
- Replace the bolts that were tightened with an additional turn after removing them.
Installation positions:
-- Install the compression ring. Refer to Figure.
-- Installing the oil scraping ring. Refer to Figure.
-- Oil the contact surface of the bearing shells and cylinder wall.
-- Audi A8: push the piston -1- with the :T40369 carefully by hand in the cylinder in direction of -arrow-.
-- Audi RS6 / RS7 / S8 / SQ7 / SQ8 / RSQ8: push the piston -1- with the :T90004 carefully by hand in the cylinder -arrow-.
There is a risk of damaging the oil spray jets through distortions.
- Never bend the oil spray jets.
-- After installing the pistons check the clearance to the oil spray jets.
-- Install the connecting rod bearing cap according to the marking.
- If the piston needs to only be removed on one cylinder bank, the "TDC" camshaft position must be checked using the installed camshaft housing.
Risk of destroying the engine by adjusting the valve timing.
- The camshafts must be in TDC point.
-- Remove the Camshaft Position Sensor 3 -G300- or Camshaft Position Sensor 4 -G301-. Refer to CAMSHAFT POSITION SENSOR, REMOVING AND INSTALLING .
- The exhaust camshaft -2- has a flattened side -1-. In the "TDC" point the flattened side must be in the installation opening of the corresponding camshaft position sensor.
- The groove -1- on the vibration damper must align with the hole -arrow- on the belt pulley side sealing flange.
-- Install the :T40069 in the hole and tighten to 20 Nm. If necessary push the crankshaft slightly back and forth. The bolt engages in the hole on the crankshaft counterweight.
-- Install the oil pan upper section. Refer to OIL PAN UPPER SECTION, REMOVING AND INSTALLING .
-- Install the cylinder head. Refer to CYLINDER HEAD, INSTALLING .