The leaking air sound migth be the fuel pump by the rear left tire, if the fuel pump is located there on your model to. And the clicking noise can be the valves, it`s a common problem with older audis here in Norway. Mine has it to, just crank up the volume on your stereo and its gone
The 'Ticking noise' would be the cam followers or 'lifters' . A common problem on this engine. Check your oil level as the ticking will get worse as the oil level drops. The lifters are operated by oil pressure so any sludge deposits forming in the engine can cause the lifters to become sticky and tick..short of replacing them tou can put additives in the oil to try and help clean them up...hope this helps...cheers
A forum community dedicated to all Audi model owners and enthusiasts. Come join the discussion about performance, maintenance, troubleshooting, modifications, classifieds, and more for your favorite models!