hi,

i have an audi a3 1.8 SE.. got the maf sensor replaced, timing belt, water pump and had a new clutch fitted. So all good BUT when revving the engine up to 4k rpm, there is a "rattling" sound coming from the engine area. local mechanic told me that he wasnt sure where the sound is coming from but told me its the hydraulic tappets and theres nothing i can do about it
but im not content with his answer and thought id ask you guys for some proper advice/solutions...

any ideas?