Hi,

I have an A6 2.5 TDI Quattro, engine AFB, W reg.

The injection timing needs adjusting but I don't have a socket to fit the 3 timing adjustment bolts on the drive pulley.

It looks like a TORX fitting but its bigger than the largest size I have.

Can someone confirm the correct size for the bolt heads so that I can purchase the correct tool?

Also, when undoing and re-tightening the timing adjustment bolts, is it recommended practice to lock or brace the pulley in any way, otherwise the timing belt will taking the strain?

regards

Eric