Does this sound like chain tensioners?

[NewArt]

Changing the cam chain tensioners is not a difficult job, except for limited access on the top (bank 2) one. You could do it in an hour. Doing the variocam tensioners is more complicated, especially with the engine in the car. I did it with the engine removed: a big project for me! Apparently it can be done without dropping the motor but it would be complicated for a first timer.

[The French Dude]

Thank you Newart !

It's the Variocam tensioner II have to change according my Indy
But it's an expensive job and I would like to know how much time it take to see if my Indy quote me the right labour time !