in my 89 GTA, There seems to be some oil leaking onto where the exhaust manifold and y-pipe meet so when the car is warm smoke starts to come out and I can't find where the oil is leaking from. It might also be that I have an exhaust leak but the bolts do not appear to be loose. Has anybody had this problem? Where should I look, Should i look again at the bolts? I just got this car....can i pass CA emissions if it is an exhaust leak? THANKS