serpentine belt tensioner torque setting

[SkyOrDie]

I have a 2014 a4 2.0T and want to replace the serpentine belt and tensioner. I have failed to find a torque setting for the tensioner bolts. I've seen specs for a 3-bolt tensioner and idler pulley, but I have a 2-bolt tensioner and no idler. These bolts are apparently single use only and I wonder if they are a torque-to-yield type. Does someone have the proper torque setting and/or instructions for a TTY bolt? I don't trust myself with aluminum at all.

[Smac770]

The serpentine belt tensioner is just a single bolt on the B8.0 CAEB 2.0T engines.
The serpentine belt tensioner is a two bolt design on the B8.5 CAEx/CPMx 2.0T engines. Bolts are replace if removed, 8Nm + 45°.
There's no idler pulley on a B8.5 because there's no hydraulic steering fluid pump. The belt runs direct from alternator to compressor.

[SkyOrDie]

The serpentine belt tensioner is just a single bolt on the B8.0 CAEB 2.0T engines.
The serpentine belt tensioner is a two bolt design on the B8.5 CAEx/CPMx 2.0T engines. Bolts are replace if removed, 8Nm + 45°.
There's no idler pulley on a B8.5 because there's no hydraulic steering fluid pump. The belt runs direct from alternator to compressor.

8Nm + 45°! Perfect. Thanks.