Hi all sorry this is my 1 st and a question /problem
Have a 2.0hdi scudo 2008 bought it cpl months ago and now and again the engine sounds very rattlely
For a few mins then sweet as a nut again oil is ok and was serviced just before I bought it
It has 200 k on clock but drives really well
I was going have cam belt kit done in a week or so but don't want spend money on a bad engine
Any advise pls

Does it use oil..or water?

A little oil but not too much I have done 6. K in 2 months
About 1 litre
Thanks