my S/C doesnt sound good at idle. almost like its grinding something, but when i pulled the belt and hand spun it, it was smooth. the temp gauge was only at 1/4 and the S/C was almost too hot to touch. and when i get over 80-100 i get a rattle type noise thats hard to describe. any ideas? low oil in the S/C maybe? would a 4lb lower do this after 3000 miles?

 

instead of just spinning the blower pulley, try putting some downward pressure on the pulley when spinning. Your lower 4 lb pulley would have nothing to do with this.
It does sound like a bad snout bearing.
How many miles on the truck?

 

Check your boost actuator, mine failed this weekend. It would stay shut at idle, causing the charger to build heat, burn my hand to the touch. It would sound like a bad power steering pump. So check the actuator, to verify the arm lifts up at idle, and the lever contacts the stop upon boosted throttle. If not, either your actuator is bad, or the vac lines going to it.
Just something to check out.
Derek

 

Yep a snout bearing i have it too but i have another blower to put on and fix the old one back It's kind of a whisteling noise and grinding noise

good luck

I'll help you out for the bearings ::::::

I have a site where you can buy these bearings,but call them first to see wich one is for the lightning blower

Here ya go buddy:


http://www.capa.com.au/prices_eaton.htm

Just scroll down and you'll find the snout bearings(replacement parts)



Johnathan

P.s you can't buy these bearing at eaton factory you'll have to buy a new snout!! So you can buy the bearings at this site

 

thanks guys! it has 32,00 miles on it. holy ***** Derek, i think your right cause my pump makes a very similar noise on some turns. i need to check that. how can i tell if the boost actuator is working right? could the oil be low? how do i check that?