My 2.4 ti is quiet regarding any ticking but I'm just wondering whether Alfa diesels have hydraulic tappets ??? If they do then this can be the sound , as they occasionally stick as opposed to move properly by the oil pressure . If the oil is incorrect for the engine or been in too long , this can induce the ticking.
I have a race engine(zetec)with hydraulic tappets and very rarely , on start up , it will tick but with a very good oil and in my case ZX1 Extralube in the oil too , it rarely happens. ZX1 is about £20 for 250ml which needs putting in after draining the oil and before the new oil .
In case it's the injectors as mentioned by someone else then ZX1 can also be added to the fuel , petrol or diesel , in fact any liquid . I use it in the diff/gearbox/engine/fuel and the water(helps water pump)
Last edited by RobMsport; 16-01-13 at 08:58.