I had similar sound for almost a year, and i don't even bother it, i'm on nearly 50k.
It happened to be even more louder when the car haven't been started or drove for few days. Once happen to me when i went back my hometown and leave the car for a week. After come back, i started the car, and the sound was very noticeable and loud, it sounded like an old junk car xD. For now, it will sound when cold start, and when the engine became hot, the sound eventually gone.

And today, i noticed a weird sound that's why i came to this post and read through mostly all the pages and it seems unrelated.

Here's my situation. I got my camshaft upgraded to s1 yesterday, and while in the process of dissembling, we found that the serpentine belt (that used to run alternator, compressor, etc) has worned out ( teared off at the middle). So i got it replace to a new one. Before that, it used to create a sound like 'tack tack tack' whenever i engaged gear and slowly move. First was not that obvious, and it slowly getting obvious day-by-day and i've it checked, we thought it was the timing belt tensioner that is going to worn, so we don bother it. After replacing, and the 'tack tack tack' sound gone. So the sound culprit is the worn serpentine belt.

To cut the story short, now i got a new weird sound. Is like an airplane sound (like when a car audio has lack of earth power), when i press the throttle once, the sound became louder, and slowly minimize and went off after rpm drop til 1k. Notice the sound coming from the pulley+belt side.

I just changed my serpentine belt, and tighten my timing belt (we found out it was loosen when dissembling yesterday). And also an upgrade on the camshaft, which i don't think is related.

Anyone can help?

Oh well, problem solved, is due to the size of serpentine belt in used.

 

I have the new style bracket for sale, a lot of parts for an evo9 timing kit job, and the waterpump.
https://www.evolutionm.net/forums/sa...ml#post9553903

 

has it been "confirmed" that the new bracket fixes the noise?

 

Yes and I have one for sale because I sold my evo. If you look above, Positron said the noise is now gone. Also look at how the bracket is cut(machined) There clearances are there.

 

Is it possible to use a bracket from an evo 8 or are they different? I know only the 9s suffer from this sound so using a bracket from an 8, if it fits, should solve the problem.

 

I have a brand new bracket that is made for the ix and I will sell it to you since i sold my ix. Mitsubishi sells the updated parts now if you loo k above some one has posted the new part number

 

for all the 9 guys that have replaced this bracket, any noises since or what, im tyring to find out what the hell the fix for this is, seems to be this bracket and should have been a RECALL, but any info appreciated, this noise is annoying and im only at 18,xxx on my 9

 

bump

 

Thanks for the info on the overfill too...
And a newbie here to say hello to everyone.

 

To those still following:

A couple of days ago i washed my car and decided to wash off the undercarriage too. I sprayed water from underneath the car under the front end to get the dirt off. Since then, i havent noticed the noise whatsoever even on cold morning starts when the noise was most prominant.

I still have all the timing covers on along with the undertray. I duno if/when the noise will come back, but i will keep you guys updated. For the last couple of days the noise is non existent so far. Its possible that i could of knocked out some grime/dirt that was causing the noise.

I did not wash the engine yet, but i will as soon as winter/cold weather is over.

 

Update:
I know its only been two weeks but the noise still has not returned. Anyone have any opinions?

 

Just incase anyone hasn't read all the posts i'll confirm what they said... its the belt... should fix most of that sound... if theres is a slite skweeky sound it is the barrings on the back of tensor or idle pully... I had problem at 37,200 miles changed the belt at 37500 and problem solved.. The belts that Mitsu. used are supposed to be more durable how ever can make noise at times..

hope this helps... depending on the difference in noise is what else it may be but most of the time it seems like problem in the belt, pulleys or something minor related.. Nothing $$$$ killer just labor / time...

 

I've read through the whole thread and noticed that no one has spoken about failures around either the belt or the pulley. Is it safe to say that although the sound is annoying...it's not anything that will actually harm the car?

I'm about to hit 30K and the sound started about 500 miles ago...trying to hold off on doing a TB until it's completely necessary. Honestly I can live with the sound.

 

I think that's pretty safe to say. I've been following this issue for a VERY long time, since I've had this noise occur intermittently on my 2nd Evo for over 2 years now, and to date I have not heard of anyone having a TB failure due to whatever is causing the belt noise.

 

I inspected the TB this weekend...everything seemed normal, no uneven wear or fraying at all. I'm getting the "washing machine" sound and sometimes get the bird chirping sound. Although it's a bit unnerving...it's not on my to do list since my miles are relatively low.