m90 making weird noise

**gtp239** · 06-11-2011

my car started making this horrible noise last week i think it is the bearings but i figured i would post a video of it to see if anyone had experienced this before.

I have another sc so i can grab parts off that if someone can point me in the right direction.

The noise stops when i took off the belt and at that point i put on a new idler pulley. I happened to have laying around so it is not that. The smooth idler and the tensioner spin freely.

The sc pulley feels like it has slight play but not any more than the spare one i have, and it never made any noises. i have a green coupler in this one.

here is a awful video i took with my phone but you can hear the noise

YouTube - ‪gtp m90 blower noise‬&rlm;
<iframe width="425" height="349" src="http://www.youtube.com/embed/FBM5blzk4gU" frameborder="0" allowfullscreen></iframe>

**vsl67** · 06-15-2011

Its a but hard to hear yuor video but listen to this

YouTube - ‪Eaton m90 supercharger rattle no 2‬&rlm;

this is what stuffed rotor block bearings sound like when they get really bad your rotors can contact each other or the case

**GTPSHAWTY** · 06-15-2011

mine sound simalar... 97 gtp 221k... runs strong... the boost doesent really pick up like i thought... and how much play in the sc pulley is too much play

**Iceman6669** · 06-18-2011

Originally Posted by GTPSHAWTY

mine sound simalar... 97 gtp 221k... runs strong... the boost doesent really pick up like i thought... and how much play in the sc pulley is too much play

I have read that any play in it is too much...

**matt5112** · 06-18-2011

If you dont get boost that quickly, might be time to inspect your rotor coating.

Though I found on a stock pulley, boost was slow to build.

With a 3.4 its much quicker.

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