Audi 80 1.9TDI 'ticking' from under bonnet before starting

[Spathodus77]

Hi all,

When I switch on the ignition for my 1.9TDI Audi 80 I get a click-click-click from under the bonnet until I start the engine, the ticking comes from the part pictured below, which I'II call the boost pressure control solonoid. Let me know if this name is incorrect! The suspect component has three vacuum lines coming from it. See three pics of the part below. The vac lines go to the following locations
The first (black) vac line goes to the air inlet.
The second (green) vac line goes to a component alongside the turbo (waste gate?) - see 2nd pic below.
The third (red) vac line disappears into the exhaust manifold - it appears to terminate at the turbo.

The car starts and drives fine, but is the clicking normal? what is the purpose of the component with the three vac lines?

Thanks for your help,

Ralph

Pic 1: Component with 3 vac lines close up:


Pic 2: Termination point for green vac line - a wastegate?

[wildoliver]

Totally normal both mine did it too.

Only advice on that engine is if your cambelt is of unknown age or even close to change time then get it changed. Very weak point on that engine.

[Spathodus77]

Thanks for that, sets my mind at ease.

Ralph