Need Help Identifying Whistling Noise

[Scy]

Hi all,

I've got a strange whistling noise which, from my perspective in the drivers seat, is coming from the front left of my car (1990, R31 4 door manual). All of my car savvy friends have had a drive/listen and have been unable to identify it, and I've also taken the car to 2 different mechanics, who were also unable to tell me what it was.

The noise is only there under a few specific conditions:

- in 3rd or 4th gear

- between 1500 and 2500 rpm

- travelling between 50 and 65km/h

- engine has to be reasonably cold or the outside temperature has to be cold, won't do it if it is a warm day or once the engine has warmed up.

If anyone has any idea what could be causing this noise, or if they've had a similar problem could you please reply here or email me at sticks_12@hotmail.com with any help it would be greatly appreciated.

Scy

Edited September 11, 2007 by Scy

[rsx84]

what kind of intake system do you have IE standard intake box, pod filter??

have you have the r31 for long?

whisling nosie is generally an air leak but there is only the intake system in that corner, have you had any work done on the engine latly?

do you notice any thing different when you drive it??

just trying to get an idea...

[Scy]

Standard intake system, I haven't added or changed anything about the car since I got it.

I've had it for almost 2 years, and the noise has only just appeared in the last 3 or 4 months.

Only work I've had done it since I got it was getting a new radiator and clutch put in and I havent noticed any mechanical issues or changes in the way it runs/drives since the noise appeared.

[QWK32]

my mate had a whistling sound coming from the front of his car after a front mount install (cheap one), and only between sertain speeds. from what we can tell must be the air going through the fins and whistling. you said you got a new radiator, is it a good quality one. might be the same thing but with your radiator fins. just an idea.