Does any of you know the part number for the termostat of the V8 3.6 Bj: 89??? I find only Polish pages with reference to the Audi V6 2.6 or 2.8 for the termostat with the number 078 121 113F. Furthermore, someone can give me information about the compatibility of coolant G013 with the above model (suitable or not suitable in terms of water pump etc). Thank you in advance