sy1616

Tried to search and am a bit new here. This normal? It's nothing noisy but a little chattery, more when engine is cold. There is a little vibration in that area too. Anything to be concerned with? Car runs great. Going in for service tomorrow so would appreciate some feedback from you guys.

Thanks!

jangy

You mean the actual SC pulley or the overdrive one on the crank that we play with?

I'm thinking SC pulley and bearings. If the SC pulley, there shouyld be NO play. I assume warranty and no mods?

prodigymb

sc pulley bearing

sy1616

Got me, the one with the belt going around it??? I'll search the pulley issue...this a big deal?

Craigo

It's your supercharger clutch (as mb refers to it) but we can call it a supercharger pulley... it's the bearings inside the pulley going bad. This is a big deal if you lose all your bearings... they can go flying into the radiator and whatever else is in the way when it decides to go completely bad.

RisingESun

+1 happend to friends 04 and it was not good

shardul

iTrader: (1)

Seems like the s/c clutch bearings. There is a diy to replace them in this subsection

jangy

if you have warranty, there is a DTB to replace the older versions with the ones made in 06

hooleyboy

If you could post up an video with the noise you are talking about. Myself and other could be able to help out a bit better. I've toasted a supercharger or two in my day.. I know all to much about chatter. I bet a good audio track could help pin point the problem.

cal1

Lift the front cover off to expose the SC clutch. You can't miss the SC clutch in the picture. You should not even see the ball bearings as they are protected by a race cover (not sure if that is the right term). The condition of my SC bearing in the picture is self explanatory.

hooleyboy

wow, that thing looks like it was hit with a shotgun.

hooleyboy

beauphus

yuck

has anybody ever replaced the stock bearings with more high performance bearings to accomodate for larger pulleys??

hooleyboy

I've heard of it, but thats about it.

Craigo

I actually just replaced the stock supercharger pulley bearing (it was shot, missing many ball bearings...) with actually a bearing that is rated "excellent for high rpms" compared to the stock bearing which is "suitable for high rpms."

sy1616

How hard was this and where'd you get it? Price?

Craigo

Pretty simple, where are you located? Price wasn't as damaging to the pocket at going the MB part path for the same end result.

beauphus

i am assuming u are talking about replacing the stock "nachi" bearing? who was the manufacturer?

Craigo

Nachi of course.