hi guys,where can i find a complete overhaul gasket set for my astra 2.2 gsi or part numbers?i'm planning to overhaul my engine ,but parts are hard to come by in south africa.can somebody help me, please!.i have a problem that my engine's intake stays full of oil residue ,how much is too much and how can i determain this?i took it in for a compression test and leakage test and the outcome was normal????????.how can i stop the oil from dripping from under the air intake that fits over the throttle body.it accumilates in the intake that comes from the filter and then runs down the throttle body and so vaporises all over the engine,over some time,about 2 weeks.