Just for information, here's a genuine Audi timing belt hydraulic tensioner next to an INA one. They clearly came out of the same mould, but the INA one is missing the Audi logo and part number:
The water ways are similarly as spotless as the internals
New pump and thermostat and all new original bolts. The old bolts have the familiar green zinc coating (well, most of them are rusty by now), but new ones are black. This is a new coating which mixes better with aluminium and lasts longer.
A familiar mess down at the crank sprocket
That's better
This bushing thing has to come out - its just a sliding fit so a couple of magnetic pick-up sticks can encourage it out
With the oil seal removed the oil pump chain is visible. The sprocket for this is actually driven by friction from the bushing which is held in by the crank sprocket.
New oil seal in
Bushing back in and sprocket back on with a new bolt. The torque on this bolt is immense - 240Nm then 180°
Belt all done
