How to align the timing chain behind the cylinder head of an Audi A6?

[VanJessica]

Audi A6 cylinder head rear timing chain alignment steps are as follows: 1. Remove the intake and exhaust camshafts, place them on a flat surface, and attach the chain. 2. There is a groove on one end of both the intake and exhaust camshaft sprockets. Align the two grooves parallel to each other, then use a vernier caliper to align both sides by pulling. Ensure they are parallel vertically and aligned horizontally; there is no need to align the inner and outer recessed points. 3. Place it on the cylinder head. Once aligned, the camshaft grooves and the cylinder head screw holes should all be aligned, so you can tell if it's level. Below is a brief introduction to replacing the timing chain: Replacing the timing chain usually does not require a complete engine disassembly. Typically, only the cylinder head and side cover need to be removed, but this depends on the vehicle model. The specific approach should be determined based on the engine bay layout and engine configuration.