Anyone tell me whether it is best to replace all engine mounts if one goes ? Have a 380 series 2 vrx with 156k's on the clock. There is a knock on the drivers side front and I was told it was better to do all the mounts if one goes or could I just stick the drivers side in and is it a big job ?

check them for cracks and just do the ones that need replacing . not a big job just need to support the engine with a jack while changing the mount.