D4 engine becomes loud hydrostössel ?

Hello Volvo fans, I’ve had my moose since Nov. 2013 and so far I’ve had 215000 km without a test. However, for some time now I have the impression that the engine (It’s about the D4 163 hp diesel) is racing. What do the experts say here? Can it be the hydro-stumps?Video XC 60 First of all, try an Aditiv. Who has experience?