jaspire

My S4 is been making a weird sound on the front left had side, and is sound like something is grinding. U can hear it when its going in reverse, when I go forward I dont hear it. Now there has been times when I do go forward and I can hear it. I have down pipes installed and I was also wondering if that could be it. Any thoughts?

jprice@CPS

wheel bearing? low/no brake pad?

JamieO

rattling or grinding or a combination of the two and does it go away if you clutch it? If so I have the same thing going on right now and I think I blew a cat (I also have downpipes and a catback).

Car Crazy

If it's a left front wheel bearing the sound will get worse when you turn right (puts more weight on the left front wheel) and the sound will go away when you turn left.

Can you see how much brake pad is left?

Also, How long ago was the full exhaust installed? Check the exhaust hangers in the center of the car and make sure the hangers are not rubbing against the drive shaft - this makes a bad grinding sound.

jaspire

reverse most of the time sometime in first gear but not really. and when I clutch it, sound still there. How can u blow a cat? Where did u get your cats from

JamieO

I'm assuming that if it is a cat (I still haven't had a chance to get the exhaust off) it's just a faulty piece... I have to give Labree a call and see what they say. I've heard great things about them standing behind their product so I hope it will be taken care of quickly if that's what it is.

jaspire

how do u know if u have a blown cat. how can u tell. I have awe and gave them a call, they said a grinding noise should not come from a cat.

JamieO

and Labree said that they don't have any baffles so whatever's in there had to come from farther up the line... most likely a cat but I'm still not sure yet. I have to try and get the system off of the car tomorrow to take a look.