I have been trying to get info on the engine Heater volvo makes for my engine (TAMD74L-B. The dealer has not been helpfull I am trying to find out which ports I attach the heater( part #865077) to. it is an external heater that heats and circulates the coolant. doe any body have expeirance with this or know a phone number I can contact Volvo directly to enquire about?