That is odd for one bank only. If you can, give a listen to tailpipe, intake throttle body and crankcase for source of leak. It could be blowing into cooling sys from head gasket too. Sounds like you may be pulling a head.
Yeah, very odd. I tested the head gasket a few months ago with a block tester and it passed with flying colors. I will check for that, but it seems that all the air is escaping out the throttle body and when I open the butterfly, it rushes out. The only thing I can think is that valves aren't sealing, but these are new springs etc. Maybe I should hook everything up, put rockers back in etc, rotate the engine a few times to see if things seat?
