knocker noise from front wheel area when accelorator depress

[forsh]

ive started to hear a knocking noise from the front of the car after i depress the gas pedal

the slower the car goes the slower the knock

heres what im thinking

brake pads?
CV joints ?
wheel bearings?

2007 saab 9-5

has anyone had problems like this and what could i replace to fix it



chris

[anttipa]

Check the wheelbolts tension at first.

[forsh]

would the noise be there if its only depressing the gas pedal

i can not hear the knocking when pressing down on the pedal,only when i let go and im slowing down,it seems to be louder the slower im going

[Shadow_Fi]

In theory when you depress gas pedal, the center of weight changes, and there is more weight going on front wheels. When you press break pedal there is even more weight going on front wheels.

So first of all, refit and retighten all bolts. Also, check if the alloy wheel is clean, just in case.

Of course it is possible that it is bearing, but normally it is noise, not knocking noice. You can check which wheel makes noise by turning harshly left and right your wheel when moving like 30km/h. When you turn this fast, one of the tyres is less heavy, and other more heavy (again center of mass), therefore you can hear sound to disapper and apper back depending which wheel is loaded more.

Hope my poor english is good enough to you.

[Pee]

I had same kind of problem with my ex-saab 9-5.
Problem was passenger side inner cv joint.
If you lift car up and roll the wheel, you can here the sound.
I bought used part there http://www.mantykorpi.fi/osahaku.php?&m ... 572&cid=34

[forsh]

passenger side wheel nuts was so loose,now i feel like a monkey

thanks for the info guys



chris