Quote Originally Posted by falcongt View Post
Oh yea I remember seeing that in a few post that I have read. Don't know anything about superchargers so I hadn't thought anything about the coupler. Do they get worn out and wobbly or something like that? If its a piece that is prone to wearing out and needing to be replaced around a certain mileage or as a precaution like a timing belt or chain would be then yes that is something I might look into replacing. Thank you for the heads up.
The coupler will wear out, just depends on how the car is driven and how often the fuild was changed as to how long it will last. If you are constantly snapping the throttle it will wear out faster than just easy sunday driving. Most tend to start making a rattle around 100k+. Fairly easy to change out with basic tools. Simple writeup here. VVV
How to replace an M90 snout coupler without removing the entire blower

You can get a coupler from several vendors. GM is not one of them, GM services the Charger as a whole unit, no couplers. ZZP, Intense, Ebay, etc... my favorite is ... INTENSE-Racing.com: INTENSE Supercharger Coupler Change Kit - Gets you a new coupler, new fluid, and the gasket maker stuff. $40 + shipping.

If there is no noise (usually sounds like rocks in the blower, or a sack of marbles being shaken) you are likely still in good shape, but you could still change it if you like. What happens is the 6 holes get egg-shaped due to torque and the slack causes a rattle. Its more annoying than anything, it won't hinder the blower unless it actually breaks and come apart, but that NEVER happens.

When I did mine, I followed the write-up I linked above, but I saved a few steps. I thought, I'm not unbolting my Alternator, I can work around it. So I did. Left the 1 bolt that requires the Alternator to be moved still bolted in, but backed way out, and just flipped the snout over, like so...


Made it a little harder to clean out everything with a rag, but I got 99% of it so I didn't worry.

Word of advice tho, WEAR GLOVES!!! thick ones! The old fluid is nasty smelling, you want a good idea, open the check/bolt and get a smell. It will soak into your hands and stay for a couple days, not ideal if you like touching your woman. so wear good latex gloves when doing this.
And lots of rags to soak up the fluid. It will go everywhere.

Took me about 30-45 minutes to change, wasn't hard at all.

EDIT: be careful of the vacuum Tee connecting into the lower intake manifold. You can see it in the picture at the bottom between the white rags. The lines are plastic type and can break if your not careful with them, that will cause problems and easy to over look.