Just replaced the upper radiator hose on my 2002 xtype awd 2.5l ...It comes all as one piece with the thermostat housing...It went in fine but the plate with the two studs that mounts to the engine, seems to be leaking from the bottom bolt where the plate is attached to the block. I lightly cleaned the metal refining plate that goes between block and plastic tee that has the thermostat attached. My question is did I not clean the metal plate good enough that goes in there..Or any installation help would be great...