The thing that's annoying is having to do it with this engine bay. If it were a sidewinder in an rsx or ep3 there is more room. I had to have a buddy of mine hold the dump tube under the car and I clamped the waste gate up top with the cowl off. And I still couldn't get both hand in there so it was really hard. You must have to take your down pipe off and subframe To do it yourself? Is there a way to test the manifold just to rule it out? I never heard of a manifold getting tested outside a car for wastegate creepage tho. Don't give up man it will be worth it in the end.