Hi i live in Poland. Half year ago i bought A6 C6 2010 3.0 TFSI CCAA from USA. Its amaziny car but one month ago i heard first cold start rapple . Right now it's rappling around 3-20 seconds. I found workshop witch one can change timing chain. But unfortunately every shops in Poland don't have full timing chain kit. They just have single parts. Could someone can tell me what parts are most important? They have 3 tensionners, 2 blockers, 4 chains and 2 circles (injection pump) . Something else is important? I'm seeing a lot of comments about changing oil valve and oil. Right now I have AMS 5w40. Which oil is best for this engine in your mind? To change oil valve i need to take off just compressor? Changing valves without tensionners have sense?