I got a 2002 7.3L PSD and I have a leak that i cant find.. its a clear liquid and could be fuel i cant tell ... its on the passenger side at the back of the motor.. now i have degreased and cleaned the valley and no leak was found the next day. now I have only notice the leak for the past 4 days and it has been very cold (it has been -7 to -18 below the past couple days) can anybody help me please thanks Mike