PDA

View Full Version : is this sound a leak or my sc

drew
03-13-2007, 05:32 PM
i've been mind****ing myself with the idea that i hav a vaccum leak, this high pitch noise i keep hearing is off and on, wich is the reason i don't think it's the sc

what do you think?

http://img.photobucket.com/albums/v296/andrewheartsbridget/th_MVI_1177.jpg (http://smg.photobucket.com/albums/v296/andrewheartsbridget/?action=view&current=MVI_1177.flv)

i also fixe my catch can, i'm using a fitting i borrowed from work that's used for feeding tubes :lol:

http://img.photobucket.com/albums/v296/andrewheartsbridget/IMG_1181.jpg
http://img.photobucket.com/albums/v296/andrewheartsbridget/IMG_1182.jpg
redline
03-13-2007, 06:29 PM
It just might be a Vac leak or pulley. It goes away when you rev it. Is the pulley alligned? What is your Vac at idle?
wgknestrick
03-13-2007, 06:40 PM
Certainly sounds like a blown bearing to me, and I would almost say it is the main ball bearing in your SC, right by the pulley.

There probably is a reason that it became bad too, probably a thrust load caused by pulley mis-alignment
drew
03-13-2007, 06:54 PM
vac is -20 at idle
redline
03-13-2007, 07:11 PM
vac is -20 at idle

Looks to be a little high but might be normal. Do you hear any boost leaks? If not I would look at into mechanical problems.
drew
03-13-2007, 07:15 PM
dont know what a boost leak would sound like
gary
03-13-2007, 07:30 PM
I would have to agree with wgknestrick. My speakers here at work make that sound like a metal on metal sound not a hiss.
Vince@R/TTuning
03-13-2007, 11:35 PM
best way to check for the vacumn leak is to smoke test the intake system, as far as the bearing noise its hard to tell on the video but some superchargers are that noisy
RayArroyo
03-13-2007, 11:48 PM
i know exactly what it is it did it to me here when i did the install. retigthen the bolts on the intake mani.
mr_eh
03-14-2007, 12:00 AM
boost leaks are hissing noises...
drew
03-14-2007, 08:47 AM
i know exactly what it is it did it to me here when i did the install. retigthen the bolts on the intake mani.

thanks ray, do you know what size those bolts are? they're the stupid ass reveresed ones that need like a hex key or whatever, right ?
RayArroyo
03-15-2007, 10:23 AM
thanks ray, do you know what size those bolts are? they're the stupid ass reveresed ones that need like a hex key or whatever, right ?

yeah they are allens. just go to pepboys and buy an allen wrench kit. i got the feeling they would eventually needed to be retorqued, due to how thin the aluminum manifold is.