Supercharger question

[Compg4me]

So I was wondering if anybody could tell me how to tell the difference between a bad supercharger coupler and bad snout bearings. I have a noise coming from the snout at idle but it almost sounds like its coming from the center of the snout.

[Reptile]

Remove the belt, and rotate the pulley back and forth. If it has play in it as you're turning it it's the coupler. Snout bearings will not have a smooth rotation to them, and they will usually start to squeal.

[Compg4me]

Here is a little video with the noise. You have to listen closely over the intake.
http://www.youtube.com/watch?v=jA_MH...e_gdata_player

[Scottydoggs]

here is vid on how to change that coupler. take the belt off and check for play, if so this is what you need to do.

Replacing a worn out supercharger coupler on 3.8 GM engines - YouTube

[Compg4me]

So I took of the belt to feel for any play and I didn't notice any, also I noticed the noise tends to go away when the it gets to temp.

[Scottydoggs]

do you have a cone filter? if so it may be normal, they all make noise till they warm up and with a open cone you can hear the engine better.

[Compg4me]

Yeah I do. I'll listen today to see if I notice it in the filter or not.

[Compg4me]

I don't hear the noise thru the filter. It's only by the snout.

[Compg4me]

I'm going to replace the coupler tomorrow. Does anyone know if I have to use Anaerobic sealant on the snout or can I use gm adhesive rtv?

[TheOtherNick]

anaerobic sealer is the correct they to use, I have not had one leak using the right stuff rtv tho.

[Compg4me]

So rtv will work?

[Scottydoggs]

anaerobic sealer is what you are supposed to use, i used hi heat black rtv, last year and im having no problems so far with it.

[Compg4me]

I'm going to give the rtv ultra black a try. It's high temp and ultra oil resistant. Should do the trick.

[Scottydoggs]

you only need the smallest smear on the snout and housing there, dont glob it on, you dont want it to be squeezing out all over.

[Compg4me]

Does anybody know if the black Christmas tree plug in the end of the supercharger shaft is necessary? I tore mine up pretty bad and wasn't sure if I should order a new one.

[Reptile]

A necessity? not really, but it keeps crud out of the shaft, which is important because it acts as a vent.

[Compg4me]

I'll stop by zzp then and pick one up there super cheap anyways.