Whining sounds at certain RPM’s in every gear

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Madracella
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Whining sounds at certain RPM’s in every gear

Post by Madracella »

I have a sound coming from the engine that only appears midway through acceleration in every gear. I hear it and for a few hundred RPM’s and then it goes away, switch gears, and happens through all the other gears. It doesn’t affect the performance of the engine, but sounds odd. Please help!!

Thanks, Tim

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terribleted
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Re: Whining sounds at certain RPM’s in every gear

Post by terribleted »

You sure it is an engine noise? this type noise is usually a transaxle noise, not and engine noise. is the transaxle (differential) gear oil the correct type and full?
Corvair guy since 1982. I have personally restored at least 20 Vairs, many of them restored ground up.
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Madracella
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Re: Whining sounds at certain RPM’s in every gear

Post by Madracella »

This noise occurs even in park , does that help?

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bbodie52
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Re: Whining sounds at certain RPM’s in every gear

Post by bbodie52 »

:welcome2: :wave: Welcome to the Corvair Forum!

So if you rev the engine while parked, you still hear the noise? That would eliminate the transaxle, since it is mostly idle while parked.

If it appears to be an engine-related noise, did you consider removing the fan belt for a short period and then restart the engine and run it briefly without the belt? Is the noise gone without the fan belt in-place? If so, it is probably coming from the fan bearing, idler pulley bearing, ore the alternator.

An inexpensive mechanic's stethoscope may help you to identify the exact location of the noise source.

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Madracella
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Joined: Wed Sep 02, 2020 2:18 pm

Re: Whining sounds at certain RPM’s in every gear

Post by Madracella »

I changed the belt, but no improvement. I will try to remove the belt and see if that eliminates the issue. I will reply with my findings.

Thank you

joelsplace
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Re: Whining sounds at certain RPM’s in every gear

Post by joelsplace »

No Corvairs have "park".
113 Corvairs, 5 Ultravans and counting
Northlake, TX

erco
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Re: Whining sounds at certain RPM’s in every gear

Post by erco »

joelsplace wrote:
Wed Sep 02, 2020 5:47 pm
No Corvairs have "park".
My 140 4-speed has plenty of park to spare.

That's all it's done for 20 years.

joelsplace
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Re: Whining sounds at certain RPM’s in every gear

Post by joelsplace »

It's actually loitering. It isn't capable of parking.
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erco
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Re: Whining sounds at certain RPM’s in every gear

Post by erco »

In my experience, "you rest, you rust" applies to both people and Corvairs.

Sorry for derailing, Madracella. Back to your scheduled program.

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