so i park my car last nite, everything runs smooth as can be. i get up for class this morning, start up the car and there is this terrible noise coming from the engine(much quiter in the video). so i check the oil, right where it needs to be. i started it back up again, and the noise is still there. no CELs, oil pressure looks awesome. I dont get it. it sounds like its coming from the pulley side of the engine. late for class, i drive the car carefully to class when i notice that its running/driving fine aside from that noise. no loss of power or anything like that. so i go talk to this one guy i know at advance who is knowlegable of hondas and what not. i ask him to come out and take a look. at this point, the noise is quiter, but still present. the first thing he said was the crank pulley doesnt look to be running "true" so he revved it real quick and the pulley appeared to be running true and the then the noise stopped. he said, its probably not that pulley other wise when i rev it it should make the noise louder. maybe the way the engine was moving made it look like it was untrue. so he said maybe alternator bearings going bad. i'm not sure, wouldnt the volts be dropping if that was the case? i turned on the a/c to see if the noise would go away, no luck. and i no longer have p/s so thats not one of the problems. i'm really stuck on this one. i cant' tell where the noise is coming from, or what could be causing it. in the vid you can kinda hear the general area where ithe noise is coming from, and you can hear it stop when i rev the engine, but it always comes right back. it seems to only do it at idle.

so heres the basic run down:

alternator is putting out 14.5 volts
oil pressure is right arond 75-80 psi at 3000 rpm, and arond 25-30 at idle
no CEL;s
no loss of power
no different driveability
just this new noise, and it pisses me off that i cant figure it out.

Help!

vid:


i tried to zoom in a bit on the crank pulley to show you what i mean when i say it doesnt look like its running "true" but kinda hard to see

 

belt slipping? possibly alternator belt

sounds like it

 

eh, not sure if its the belt. its relatively new, maybe 10K miles on it. im not sure how old the alternator is, it may have 80K miles on it, it may have 150K miles on it

 

up for more opinions

 

bumped for this.....kind have the same problem

 

sounds like a pulley is going bad to me.. try spraying the belts with some belt dressing... try unplugging the AC compressor and taking that belt off and then running it... this will narrow it down

 

one of your belts sounds like its slipping, mmost likely the ps belt because our ps leak all the time. I would check the tensions on the belts, they should give that much slack when u press on em. Also see if anything got on the pulley like, a bag or rope. If you notice no power loss and your not getting any cels, than i think one of your belts or pulleys needs to be adjusted

 

he doesn't have powersteering. The bearings in the AC idler pulley do wear out, spray the belts if that doesn't fix it then take the AC belt off.

 

it loooks like it is gonna be the idler, i'll be able to tell for sure when i get home for the weekend and am able to actually take it all apart. i just removed the belt off the pulley and moved it out of the way and ran the car. the noise stopped, so im assuming its the comp. idler

 

crank pulley not on tight

 

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then why would it stop when i remove the ac belt?

 

i would disregard that...

 

happened to mine a while ago.
is your A/C on when the noise comes up?

my a/c clutch a while back froze up and died causing noise like that to be made. i took off the belt, now i have no ac.... but the sound is familiar.

 

nah i turned the ac on and off and it didnt make any difference in sound, thats why im thinking its the idler

 

i can't see the video from the network i'm on right now but i have an issue with a/c idler pulley at the moment