Re: New whining sound from fan.

Jul 03, 2003 6 Replies

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Speedy Jim 23 years ago

> I just noticed today a new kind of whining sound from the fan on my
> 1600DP. It isn't a scraping sound like the fan against the shroud.
> It increases with RPM's. I have a thought that it might be the plates
> that bolt to the back of the alternator, maybe they somehow loosened
> so those pieces are vibrating against each other creating this sound.
> I did convert it to an alternator a couple months ago but this sound
> just started. Does my theory sound correct? Anyone else ever
> experience this? Either way, I am going to take it back apart but
> just wanted to know if anyone had any other ideas what it could be. > Thanks.

Whine sounds more like a bearing noise.

Speedy Jim

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Olli Lammi 23 years ago

I sometimes have heard whining noise from the passenger seat. That also sometimes increases with RPM's. Nothing to do with the generator / alternator though.

HTH ;)

Is the fan belt too tight (killing the bearings) or loose (slipping)?

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RSMEINER 23 years ago

Or frayed.

Randy

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John Stafford 23 years ago

Are you sure it's not FWEEM? Maybe your peashooters are finally broken in.

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Jan Andersson 23 years ago

I still think it's the fan rubbing the shroud, on either side. Push/pull teh top of the shroud and see if the sound changes.

Also take a peek under your distributor cap, if the shaft is dry it will make a hard-to-locate high pitched whining sound as the dry metal touches the dry slider thingee of the points.

Jan

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Olli Lammi 23 years ago

Yes. It must be the passenger seat muffler bearing lacking lubrication.

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Josef 23 years ago

I agree?

Did you overtighten the fan belt?

It should deflect at least 1/2 inch to 3/4 inch when you press firmly on it with your thumb.

Maybe they sent you a defective alternator. It may not be too late to send it back for a refund or a different alternator.

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