I just recently heard it coming from the engine. Starts at idle when the car is warmed up. And it changes pitch when revved but disappears, whether due to the engine drowning it out, i dunno.

I called Jackson Racing to make an appointment today. He asked me if I had a Supercharger... so this is why I am concerned that it might be a supercharger issue.

At worst, its something with the charger... at best its the water pump... either way its not a cheap fix.

So, any ideas as to what it may be? My car only has about 72000 miles so I wouldnt think the water pump would be out yet...

 

no one has a clue huh? no one has had the same experience??

 

depending on the pitch it sounds like u have a loose belt. but its better to make sure. HTH

 

yeah sounds like a loose or dry belt, this happened on my car about a year back, but the whining noise never went even when reved, it turned out to be a dry/worn alternator belt, check and tighten all belts before you bring it to a shop

 

If you've replaced the PCV valve on your car, it could be that. I've heard them make noise at ceratin RPM/Loads combinations and not others.

 

could this also be the case if the PCV valve isn't properly seated? I just put in a new IM and noticed yesterday that the PCV was kind of loose feeling where it pokes through the IM and I've found a fair number of other issues with the install so its extremely likely that they may have done something to it.

 

Not sure. If the valve is not vertical then it might be more prone to "chirp" and "whirr". Mine doe sit constantly, but that's just becaus of the brand / materials I think. It's a metal one.

 

hmm, well once i'm back on the raod again, I'll try fiddling with it a bit to see if that's what's causing my noise. I hadn't thought of that though, I thought it might be because they didn't fit the intake pipe connection securely on the TB and that might be cause some sort of vacuum leak. I checked all the hoses and reseated and clamped them but other than noticing that the PCV felt a little loose I hadn't messed with it, maybe I'll try shortening the hose that's connected to it as its now a little too long with the new IM. thanks for the info.

 

yeah im thinkin it might be the supercharger belt or something... but it looks and feels fine to me. There's really just the right amount of slack on it. could water do anything to the belts? i hosed my engine off a while ago...

 

OK, this really doesn't seem supercharger related.

When the engine is cold, ie at start up, it doesnt make the noise. Only once it has reached optimal operating temperature does it make the noise! So, would this be water pump, then? Since a bad belt will whine regardless of engine temperature... what else is there that could be affected by engine temperatures??

 

PCV valve. . . .
It won't flow quite as much until the crankcase is warmed up.
I don't remember if you said yours had been replaced or not?

I'll stick to that.

 

alright, thanx for all the input. i've narrowed it down a bit, but most likely i wont know for sure until monday. Thanks everyone.

 

Let me know what you find out. Mine just started doing the same thing. Whines at idle right when I start it up... drive around and it disappears. I figured it was a belt that had to be broken in (replaced three this past week while installing my stepper pulley).

PCV valve... where is that located exactly?

 

The PCV valve can be seen by following the large tubing from the front of the intake manifold down under the fuel rail and in between the 1st and 2nd intake runners from the distributor side is where the top of the PCV sits. It comes up and then makes a right angle to where the vacuum hose connects. It helps to burn off gases built up in the crankcase by routing them into the IM where the accompany the clean air into combustion and get burnt up.

chilton's has a nice section about PCV valves and how to check their operation.

 

csufweed... have you figured it out yet?

 

no, i havent gone in to have it checked out. i have also heard that maybe its the JR pulleys as well as a whole lot of other crap. everything looks good, as far as belts and such, but i cant determine the problem without taking apart a few things, so I am gonna go in monday morning and have Jackson Racing look at it.

 

I don't think that it's the idler pulleys. Those tend to squeak and squeal... not whir.

Let me know if you find anything out. I'll do the same.

 

Mine does basically the same thing, except for i know my problem the gasket in between the blower and manifold is bad i tried to replace the other day but i stripped out the the head of the allen bolt inside the manifold. anyways my sideeffects are when i start the car since it's leaking it squeals like a bad/loose belt and the idle is also messed up. My car sounds like a cammed gt w/ dying cats under the hood.

You may want to check that out. Turn the car on and out your finger where the blower and manifold meet and slowly pull away if it sucks your finger then u have same problem that i do. Good luck

 

yeah... i dunno, i'll check, but mine HAS TO BE WARMED UP to make that noise... course I'll check anything thats possible. Thanks so far.

 

Mine too, when i start the car i revs to almost 3000 then it drops down and start loping usually from 1500 to 2500 repeatedly. The sqealing noise comes and goes. Im getting it fixed tomorow so the car should run great after i replace that gasket. keep us informed

 

well if thats the problem then i'd like to get the hondata gasket... but i just want the car to run fine, so whatevers cool. however with any boost higher than 6psi, the gasket should be very helpful in reducing intake temperatures.

 

Are u talking about the head gasket? the one im talking about is the small square one with 4 holes that goes inbetween the blower and manifold. I already have the gasket but im getting the bolts tapped and removed tomorow. (The 2 is stripped the other day.

 

this is what im talking about... http://www.hondata.com/heatshield.html

 

 

damn it... took the car in today... this morning, started it up... and started driving... sure enough the noise was there once it warmed up... half way there, it got silent... the noise disappeared?!?! got to jackson racing... still no noise... and now im home, the phantom noise has struck again! The noise is still an unsolved mystery.