Ok so i have had my 03' A4 1.8T for 6 years now and i could fell something wrong with my engine. Turns out i have exhaust gas in my coolant, So i need a new gasket right?? Do the heads and blocks on the 1.8T engine have a history of developing cracks?? Also since i have to basicly take apart my whole engine what else should i upgrade i already have a new turbo and intake in my sights anything else?? Thanks for help guys