High Pitch Whine?

[636]

Hey guys, recently I've been hearing this high pitch whine coming from the front end of my car. It reminds me of a straight cut gear, or even a supercharger whine. I've never heard before this, and it's very random. Only seems to pop up when it wants to.

I got a quick video of it, hopefully you can hear it.

[ame="https://www.youtube.com/watch?v=LOJAnWEanmk"]FRS - High Pitch Whine - YouTube[/ame]

Any ideas?

[Ultramaroon]

It's interesting. I'm going to guess it's one of the belt-driven accessories since I hear it clutch both engaged and disengaged. Did a twig or something maybe fall into the alternator?

[humfrz]

Either @Ultramaroon has better ears that me, or your both hearing things .....

Interesting color on your car .....

So, does it "whine" when the car is sitting still .. ??


humfrz

[Ultramaroon]

Originally Posted by humfrz

Either @Ultramaroon has better ears that me, or your both hearing things .....

Interesting color on your car .....

So, does it "whine" when the car is sitting still .. ??


humfrz

It's pretty subtle but you can hear just like what OP says is noisy gears. Reminds me of gear driven camshaft conversion on an old v8 or a timing belt that's stretched too tight. Follows the engine when he blips the throttle.

[636]

Originally Posted by humfrz

Either @Ultramaroon has better ears that me, or your both hearing things .....

Interesting color on your car .....

So, does it "whine" when the car is sitting still .. ??


humfrz

It does whine while sitting still, but as the RPMs climb, the noise gets higher pitched, just like a straight cut gear.

[636]

Originally Posted by Ultramaroon

It's interesting. I'm going to guess it's one of the belt-driven accessories since I hear it clutch both engaged and disengaged. Did a twig or something maybe fall into the alternator?

I'll have a look around, but I don't think so..

[Ultramaroon]

Originally Posted by 636

I'll have a look around, but I don't think so..

I was kinda half joking but something in there is failing or rubbing.

[humfrz]

Originally Posted by 636

It does whine while sitting still, but as the RPMs climb, the noise gets higher pitched, just like a straight cut gear.

To follow up on ol @Ultramaroon 's theory, I'd suggest you find a long screwdriver or a metal rod and place one end up near your ear and touch the other end around on things in the engine (like the belt driven things) to see if you can isolate the sound/noise.


humfrz

[Ultramaroon]

Originally Posted by humfrz

To follow up on ol @Ultramaroon 's theory, I'd suggest you find a long screwdriver or a metal rod and place one end up near your ear and touch the other end around on things in the engine (like the belt driven things) to see if you can isolate the sound/noise.


humfrz

To follow up on @humfrz's suggestion, I recommend the pointy end face the engine.


All kidding aside, loose clothing and long hair are a no-no.

[humfrz]

Originally Posted by Ultramaroon

To follow up on @humfrz's suggestion, I recommend the pointy end face the engine.


All kidding aside, loose clothing and long hair are a no-no.

Oh, yes .... and DON'T stick the rod in your ear ...... stick the end of an old wooden handled screwdriver on the end of the rod and put that up to your ear ...... wooden handled screwdriver, you ask ...... yes, back in the day, screwdrivers had wooden handles, like monkey wrenches ......

OK, just improvise or buy a store bought scope.


humfrz

[Ultramaroon]

Originally Posted by humfrz

Oh, yes .... and DON'T stick the rod in your ear ...... stick the end of an old wooden handled screwdriver on the end of the rod and put that up to your ear ...... wooden handled screwdriver, you ask ...... yes, back in the day, screwdrivers had wooden handles, like monkey wrenches ......

OK, just improvise or buy a store bought scope.


humfrz

Back in the day? I have some really nice wooden handled screwdrivers.

[Stang70Fastback]

Speaking of whine, is it normal to be able to hear the transmission in this car? I can't figure out if I'm only just now noticing it, or if something is wrong, but you can definitely hear gear whine in the lower gears in thus thing.

[Ultramaroon]

Originally Posted by Stang70Fastback

Speaking of whine, is it normal to be able to hear the transmission in this car? I can't figure out if I'm only just now noticing it, or if something is wrong, but you can definitely hear gear whine in the lower gears in thus thing.

I've had it forever, I think just when it's cold.

[636]

Someone brought up the suggestion of dying Alternator Diodes. It kind of would make sense, as my car has been sluggishly turning on the last two/three months, as if it doesn't have enough power to start.

Think that may be the culprit?