My apologies if this has already been discussed but I am trying to determine what part this is. My 2012 PPV has developed a coolant leak on the right side of the motor where there appears to be two plastic housings on the upper side of the motor. I can’t find an engine diagram to determine what part this is but the coolant will ‘spill’ and vaporize off the engine throwing up a white cloud while reversing up an incline. I’m going through half a reservoir every 2000 miles. Before the local shop charges me a $250 dialogistic fee to glance at my motor, what am I looking at??