Engine noise when warm... Right oil?
I have a tapping noise from the left hand side of the engine, I'm not sure if its a ge related because my alfa 147 1.6 has done nearly 132,00. The noise only comes on when engine starts to warm up and it's there when engine is hot I have spoken to 2 mechanics one said most prob needs oil change but use 10w40 semi as it lubricates the engine and components better especially if the car is used on shorts runs, anyway I changed oil and filter but noise come on again when hot. So couple months later I asked a different mechanic and was told to use fully synthetic 10w40because when engine is hot the oil does not break down and stays like 10w40 whereas semi when warm breaks down when hot to 10w30.....not sure if this makes any sense! Anyway second mechanic recomend fully synthetic on high mileage 16v engines.
The car still runs fine but would rather the noise not there, I want to sell it soon and want to get a jtd and don't want to put people off with the engine noise... Maybe I being fussy
Would appreciate any recomendations
Ps I 95% certain it's not the variator