MartinWake

Okay guys I need some help trying to figure this out. Before you watch the video and comment what you think let me explain. I have been trying to figure out which pulley is the one making that sound. It is not one of the drive belt pullies since when I remove the supercharger belt the sound is not there. Here's the thing the supercharger tensioner pulley I replaced, it is replaced on the video (its the black one) but still makes sound so you would think its another pulley. The weird thing when I had the original pulley I put some grease near the bearing and the sound went away almost entirely. I tried to do the same with this one and it just started screeching so loud until I cleaned it up and it just went back to the way you hear in the video. Today I literally just took the belt off and put it back on and it started screeching again. So could it be that they sent me a bad pulley or is it my belt or could it be the supercharger pulley that is somehow affected by what I do to another pulley?

JoeJErnst

You should be able to identify the culprit with a little squirt of WD40 into the center of the pulley. It will normally make the squeak go away for a few minutes.

MartinWake

I did that before and it made the screeching even louder...

JoeJErnst

Then you found the guilty party! If WD40 affects the sound at all, something is wrong with that bearing.

MartinWake

This happens with the old and new pulley I just received a few days ago, could they have sent me a faulty one?

JoeJErnst

Sounds like they did. If you remove the belt and spin that pulley by hand, does it make any noise? How long does it spin on its own? A good bearing will only allow the pulley to spin freely for a few revolutions at most if you spin it by hand. If it's loose, noisy, or spins freely for a few seconds, the bearing is bad.

ArmoE55

OP-

Highly recommend swapping all your pulleys for the UDP 5-piece set. I did this 5-piece swap when I did the 83mm and belt wrap kit, quiet and everything is brand new. Much more durable and well-built products than the OEM ones - that are well known for bearing failures and pulleys cracking.

My .02

MartinWake

Yeah I would but I wanna keep the car stock.

MartinWake

Both old and new pulley don't make any noise if I spin by hand, the old one spins really freely and the new one is a little harder to spin. They have already shipped out a replacement so lets hope its that. I just don't understand how I literally just took the belt off and put it back on and the sound changed.

MartinWake

still screams with a brand new pulley.

MartinWake

Screams more when I put pressure and less when I remove pressure. Same thing with all 3 pullies 1 old and 2 brand new.

tlambert

Just curious, what name brand belt do you have on it?

Also have you sprayed anything on the belt? That will sometimes cause the belt to squeal.

MartinWake

I did not spray anything on the belt. I do not know what brand the belt is long story short my "mechanic" told me the belt was the problem so he gave me another one he had there. I just got my old belt back from him which is contech or something like that which I got from fcp, anyways my old belt is a bit longer then the one he gave me. Tomorrow morning I will put my old one back on with the two new pullies I have to try it out.

tlambert

I have had cheap belts squeal and had some type of lubricant get on a belt that made it squeal so bad that I had to replace the belt.

Just a thought.

MartinWake

put on my original belt from fcp, does not make sound at idle but if you rev it up you can hear it again. I guess ill try a brand new belt but I don't think its that since the sound increases with the pressure on the pulley.

MartinWake

Fixed it. Cleaned the belt with alcohol.

tlambert

Good to hear. I wondered if it was a messy belt. Glad it worked out for you.

MartinWake

Welp now I have to clean it everyday for it not to making the annoying noise and only works if I clean my old belt which is a little longer then oem even though I bought it on fcp euro. If I clean the oem belt it will start making noise as soon as I give it some gas on drive not idle.

This is with 3 different pullies two which are brand new with the same bearing as oem!