hi, doing the timing belt and water pump soon so i thought i would do the thermostat at the same time as the temperature has been fluctuating.but audi have said, i need a thermostat and housing and 2 bolts.has anyone replaced theirs and how much of a job is it to do. 2.0tdi 2011 cjcb engine thanks....i got the ina timing belt kit from ebay item no 163819738374.....water pump meyle hd from justgermanparts on ebay no item number as bought on the phone.....diesel engine timing locking tool kit ebay