Putting together the S6 after carbon cleaning and installation of spacers. Car starts and runs, however have a loud whistle sound, it’s rpm dependent, and if I put pressure on the throttle body it will change pitch. Assuming I have a leak between throttle body and intake. Removed throttle body, checked new gasket and mating surfaces and all appears to be good. Reinstalled and torqued to 9 NM and one bolt broke before getting to the 9 nm. These appear to aluminum bolts, getting some new ones tomorrow. Anyone else have this problem? Looks like you need to be very carful with the torque spec.
Anyone use a sealant in addition to the gasket? Is warping a possibility? Put a straight edge on the throttle body flange face, and it seem pretty good, probably need a large flat surface to really check properly.
