hey when i rev the car from idle to ~1500 rpm i hear a strange click coming from the turbo , i checked its not the wheel , i also leak some exhaust gazes from my valve cover ( guess its badly seated ) is this normal ? i tough it might be valve that are burnt so they dont completely close...

 

if you have an exhaust leak, that might be the clicking sound, they almost sound like valves knocking when they are small leaks.

 

Yeah look for an exhaust leak. Mine clicked for the longest time and couldn't figure it out until I tightened all my bolts and the click went away.

 

ok thanks , also ... when idling is it normal that there is a pression coming out of my oil cap if i open it ?

 

it's normal