If you need to get in there you need to put it in to service mod
Basically you remove the front bumper and carrier. then move the AC rad out the way if you have it this will save you having to discharge it.
Remove the two lower bumper carrier mounts
And then remove there engine cooling radiator and fan housing.
That will give you access it normally takes me about and hour to strip the front off, but I have done it a few times now.
The first time I removed my SC, I found the coolant hoses from the water pump had nearly been worn though buy the hose clip on the lower hose. if your in there have a look Incase it was very close to going pop.
Hope these help have a read it will point you in the right direction Girls's Guide to Removing the Bumper, Bumper Carrier, and the Modular Front End - North American Motoring R53 Drivetrain :: Replaced Supercharger Tonight!!! DIY - North American Motoring