mjharper

iTrader: (1)

Hi guys,

When I'm cruising (not accelerating or very lightly) I can hear a faint noise which sounds to me like a chain, almost like if you turn a push bike upside down and move the pedal with your hands.

Not a lot to go on I know but thought I'd see if someone here might have an idea!

Thanks

(2007 WRX Hawkeye)

I've recorded some audio of this happening - you can hear it clearest from the very start for about 10 seconds, I got it to make the noise non stop later in the clip but my mic must have fecked up

I'm pressing lightly on the accelerator to make it happen - I've listened to clips of drop links and heat shields but not sure if this is the same noise

http://1drv.ms/1DLf5Mj

alcazar

iTrader: (2)

Could be, (in no particular order):
loose turbo heat shield.
loose exhaust heat shield.
stone inside the disc guard.
handbrake shoe too tight.

L.J.F

iTrader: (31)

Can you locate what end of the car the sound is coming from? It could possibly be a loose shaft or possibly a diff issue.

RS_Matt

Could be brake wear indicator starting to catch, especially if its intermittent.

mjharper

iTrader: (1)

It's definitely the front of the car, sounds like something in the engine - guess I need a proper investigation

chieftain333

I'd say it's the heat shield,I've got the same problem with mine

RICHARD J

iTrader: (4)

I'd bet it's the front diff bearings, does it sound like a ratchet mechanism clicking?

mjharper

iTrader: (1)

Yeah it is similar to a ratchet getting turned really fast, almost like a chain that needs oiling - thanks guys at least I have some potentials to narrow it down

mjharper

iTrader: (1)

Bump (added audio clip)

fat-thomas

iTrader: (4)

i had a similar noise and narrowed it down to a faulty cam belt tensioner.
you could only hear when you gave the throttle a light blip in neutral.
no noise when driving etc

mjharper

iTrader: (1)

Sounds similar, mine will do it light tapping throttle in neutral or lower gears

fat-thomas

iTrader: (4)

i couldnt hear it above 1500 rpm or on idle had to lightly tap throttle.

mjharper

iTrader: (1)

That sounds exactly the same as what's happening with my car - I'll get someone who knows what they're doing to check it out cheers

mjharper

iTrader: (1)

Sounds very similar to this, think the tensioner might be the culprit:

fat-thomas

iTrader: (4)

yes exactly what mine sounded like, once revved it disappeared.
when you take cam belt cover off you can see the tensioner bouncing

mjharper

iTrader: (1)

Had a mechanic I know take a listen and he said the sound isn't coming from the cam belt area so now I'm confused again! here's a youtube for viewing pleasure!

https://www.youtube.com/watch?v=wf9Z...ature=youtu.be

mjharper

iTrader: (1)

This is the engine idling without any throttle
https://www.youtube.com/watch?v=GjdE...ature=youtu.be

mickeymouse

mjharper

iTrader: (1)

Cheers Mickey, definitely worth checking as it sounds the same - I'll get it checked