Did you pull the oil filler cap off while running to see if the whistle stopped? Did you get the code pulled? You didn't specifically mention the vacuum line going to the MAP sensor. If you haven't checked that yet, be certain that it didn't get knocked off during assembly.

yeah, i checked under the map. i completely pulled off the vac line that ran from that around under the supercharger snout up to the fpr and boost actuator. no evident damage. i just pulled the oil cap again and this time it seemed like the whistling got lower in tone...hmmm. I already checked the pcv valve, but is there something under the supercharger that i could have knocked loose or not installed right? or under the intake manifold? (i doubt that, i was really careful setting that in) im probably going to go to A.Z.(no, not Arizona ) tommorow to scan the damn thing before i tear it down again.

I would think the whistling should have stopped when you pulled the cap. However, how did the cover'* gasket for the pcv look? How about the o-ring and spring? Did they appear in good shape. You may want to replace the o-ring just for a test.

Using the care that you did, it wouldn't seem likely that you would have knocked anything loose. The coolant o-rings under the supercharger would be the most likely, but you'd likely be loosing coolant then.

Did you pull the MAF and IAC from the throttle body for cleaning? Perhaps one of the O-rings for those didn't seal properly. Other than the throttle body gasket, that'* about all I can think of right now.

Did you get a chance to pull those codes today?

no. just got off of work. somebody suggested something at work(This guy knows his stuff) and its something i didn't think about. he thinks i might have overtightened the supercharger bolts and crushed the rings in the supercharger gasket. i think thats what happened, because i just tightened them in order, but not to a specific torque(very tight). im going to tear down to the supercharger gasket, because the pcv valve/o-ring look/sound fine and that sounds like it might be what my dumb arse did, i cant think of anything else. i just happen to have a extra supercharger gasket i was gonna return in my backseat anyhow.

That'* all well and good, but pulling the codes is free and takes only a few minutes to tell us what'* up. There may be other things that you can address while you have the SC off the engine that the codes will inform you of.

I just would hate to see you go through that work, still find codes, and have to do pretty much the same work again.

I don't believe you could overtighten the supercharger gasket and hurt a thing. The o rings being mentioned are to seal the coolant from LIM to SC. They sit in a recessed area and expect to be compressed. While the spec is much lower, I have tightened mine to 20 ft lbs more than once. The gasket is a simple paper based gasket overall, and may have not seated properly or torn etc upon install.

Meanwhile, you've got an issue that is driving you nuts and it won't hurt anything, afterall the gasket with o-rings is $6. I wouldn't pull the charger until you know what the codes are though.

well, i tore down before i saw your guy'* posts. noticed the fuel rail was WAY easier, it may have not been in all the way. and i put in my extra thupercharger gasket. i dont know which problem it was, but it doesnt whistle now! thanks guys for helping me out on my week and a half long LIM gasket swap. now to take off that annoying lower radiator hose clamp, drain the water out, and fill it up wit the yeller coolant.

That'* the important part. Glad that all is now quiet at the whistle stop!

DOH! this may not be over with. today while driving to work, the ses light came back on again. i borrowed my bosses scanner on my lunch break. it said p0401, "EGR Insufficient Flow". i connected the EGR tube back when i put the intake manifold back on. WTF? engine is running fine. ill try to take a look at it saturday, when im off. i cleared the code to see if it was a fluke. Should i spray TB cleaner on it like was suggested in the "EGR code" thread?
thanks