Whistling at high rpm

[T_F_E]

Alright, I have had this noise since I bought the car and its finally getting to me. Anytime the engine is at over 3000 rpm I get a whistling noise, everytime, nothing at 2900 but at 3000 it happens and continues till it drops below. I checked vacuum hoses and I am stuck, any suggestions?

[anothernord]

Exhaust leak?

[T_F_E]

It's fairly high pitched, my dad can't hear it. I'll look around tomorrow

do you have an intake? my cone filter whistled on my pontiac at high rpm's idk why tho :smt017

[danci1973]

Alright, I have had this noise since I bought the car and its finally getting to me. Anytime the engine is at over 3000 rpm I get a whistling noise, everytime, nothing at 2900 but at 3000 it happens and continues till it drops below. I checked vacuum hoses and I am stuck, any suggestions?
By stock '99 BH 2.5 does that too! It sounds almost like it was a turbo... :smt017

I think the intensity of the whistling noise is related to the throttle opening - I can go over 3000 RPM with low throttle and it wouldn't whistle (or it wouldn't be loud enough to hear). If I step on it, it's clearly there.

I was thinking it could be some alternator / AC / power steering bearing, but that doesn't explain the throttle dependance...

I'm also interested in the cause / solution...

D.

[geckoboy86]

I also am having this whistling noise. exactly like danci1973 said to the letter. My car is a 95 BD L 2.2.

[Brockley]

I have the noise. Somewhere before, someone said the Legacy mufflers have a weld that breaks and that causes it. sounds nearly like a bearing going bad its soooo loud.

so, I took my muffler off, and no whistle.
Put a flowmaster on, no whstle.
put a 2.5 RS on, no whistle.

So, I painted my GT muffler with some header paint to see if it would keep it from whistling, and it did... for about an hour maybe...

the paint flaked off where the pressure was coming out, so now I know where it comes from...

On the sides of the muffler, there are two long folded parts, where they weld the halves together. mine broke near the end on the psgr side, towards the front of the car.

I would check there first...

[T_F_E]

wow i didnt realize this problem was this common, i can go re weld the muffler and well see what happens

[danci1973]

The muffler? Really? :shock: I could've sworn it's coming out of the engine bay... :smt017

My muffler is in deed badly rusted and I'm getting an aftermarket replacement this or next month.

D.

[geckoboy86]

The muffler? Really? :shock: I could've sworn it's coming out of the engine bay... :smt017


X 2...
If it is the muffler I will be very happy

[T_F_E]

yeah it definetly sounds its coming from the engine bay to me to, my mid pipe to axle back gasket is gone so ill order a new one and see what happens

[Autoevo]

My 95 wagon has the same thing at 3k plus. I really think it's a leak from somewhere between the air filter to the throttle body.

[Brockley]

I promise you guys, mine sounds like its coming from the intake area when you are in the car, but that IS where mine is leaking. EVERYONE thinks it sounds like the intake something up front, but it's just the sound reverberating up to the front. I can try to take a pic next time I get a chance...

now, thats not to say yours are 100% gonna be the exhaust leak, but just start there... its 2 bolts and 3 rubber hangers from being off the car anyways, just remember if you take the axleback off, you may need a new gasket or it might leak...