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Re: Blower bearing noise?
Posted by: Cheese ()
Date: May 23, 2016 03:42PM

Just went out and tried running it with the belt a little looser. Noise was gone. Can it be the belt is too tight? How should I adjust it?

Matt
63 Vert
Dyer, IN
............................................

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Re: Blower bearing noise?
Posted by: Cheese ()
Date: May 23, 2016 03:54PM

Wait, Scratch that....still makes the noise.

Matt
63 Vert
Dyer, IN
............................................




Edited 1 time(s). Last edit at 05/23/2016 03:54PM by Cheese.

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Re: Blower bearing noise?
Posted by: amhubing ()
Date: May 23, 2016 04:10PM

cheese,what I would try now / take a length of hose, say 3/4 i.d. and hold it to the rotating parts, other end to your good ear, now you can get it. al

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Re: Blower bearing noise?
Posted by: MattNall ()
Date: May 23, 2016 05:37PM

Belt on cold engine should be loose enough that you can slip the Gen / Alt pulley. with a finger.

MODERATOR
Sea Mountain, between Charleston Harbor and Coos Bay! SW Oregon Coast
Click HERE for My Website...Click HERE for My TechPages!
...............110-PG.................................................Webered-Turbo

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Re: Blower bearing noise?
Posted by: Cheese ()
Date: May 23, 2016 05:45PM

Ok, thanks Matt. That's how it is set. Anyone have an idea on what this could be? Also, anyone have an answer to the crankcase vent question?

Matt
63 Vert
Dyer, IN
............................................

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Re: Blower bearing noise?
Posted by: red64vair ()
Date: May 23, 2016 06:23PM

Your belt is vibrating when it is making the noise then stops vibrating and noise stops when you rev the engine. It looks like the belt is vibrating against the belt guard at the fan pulley. I had a similar noise that acted the same as yours except the sound was more like a screak/rattle. Tightening the belt solved it. If tightening does not stop it try applying a little brake fluid to each side of the belt.

Larry Blaylock
Saltillo, Mississippi
64 convertible
66 customized Corsa coupe


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Re: Blower bearing noise?
Posted by: Cheese ()
Date: May 23, 2016 06:38PM

Thanks Larry. I removed the belt guard completely and tested it. It still made the noise. I think you are on to something with the vibrating. On that second video I posted I mentioned that the belt seems to flop around more when it is making the noise. I dont see the fan hitting anywhere. I also thought maybe the cooling air from the fan might be making something loose move. I looked around below the engine and didn't see anything out of the ordinary.

Matt
63 Vert
Dyer, IN
............................................

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Re: Blowby?
Posted by: MattNall ()
Date: May 23, 2016 06:52PM

Cheese Wrote:
-------------------------------------------------------
> On a side note, is the amount of smoke coming out of the crankcase vent normal?

===================================

That is "slightly " excessive. What weight oil are you running?

MODERATOR
Sea Mountain, between Charleston Harbor and Coos Bay! SW Oregon Coast
Click HERE for My Website...Click HERE for My TechPages!
...............110-PG.................................................Webered-Turbo

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Re: Blower bearing noise?
Posted by: Brizo ()
Date: May 23, 2016 06:55PM

Cheese, It sure looks like the belt is hitting the upper guide and before you said you removed the guide, I was going to say move it closer to the belt so it dosent have room to vibrate. Does it go away or get worse when its in gear? Are you running a wrapped belt? are both surfaces of the fan pulley smooth? (no rust bumps, etc. ) If there is a power imbalance between cylinders it can cause the belt to vibrate but but not usually on just one section.

Dan Brizendine, Circle City Corvairs
'64 8 door Greenbrier, +.060, stroked 1/4", 186 ci.140 PG. "In beautiful Wanamaker Indiana...with one stop light and 5 pizza shops"

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Re: Blowby?
Posted by: Cheese ()
Date: May 23, 2016 06:57PM

MattNall Wrote:
-------------------------------------------------------

>
> That is "slightly " excessive. What weight oil
> are you running?

10W30. This engine has sat for 9 years. It is less smoke then it was when I first got it running. Perhaps stuck rings?

Matt
63 Vert
Dyer, IN
............................................

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Re: Blower bearing noise?
Posted by: Cheese ()
Date: May 23, 2016 07:03PM

Brizo Wrote:
-------------------------------------------------------
> Cheese, It sure looks like the belt is hitting the
> upper guide and before you said you removed the
> guide, I was going to say move it closer to the
> belt so it dosent have room to vibrate. Does it
> go away or get worse when its in gear? Are you
> running a wrapped belt? are both surfaces of the
> fan pulley smooth? (no rust bumps, etc. ) If there
> is a power imbalance between cylinders it can
> cause the belt to vibrate but but not usually on
> just one section.

I have not tried the putting it in gear yet and listening. Just a little history. The engine sat for 9 years. I just got it running again. I rebuilt the carbs and was following Matt's carb balancing guide. When I got to setting the timing, that is when I discovered the noise. Timing is set but I have not balanced the carbs. Maybe I should go ahead and balance the carbs and see if it is a rough idle that is causing the problem.

Matt
63 Vert
Dyer, IN
............................................

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Re: Blowby?
Posted by: MattNall ()
Date: May 23, 2016 07:07PM

Perhaps....Try a Can of Rislone "Engine treatment"...stopped blowby for me recently... $5 at Walmart

[www.walmart.com]

MODERATOR
Sea Mountain, between Charleston Harbor and Coos Bay! SW Oregon Coast
Click HERE for My Website...Click HERE for My TechPages!
...............110-PG.................................................Webered-Turbo

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Re: Blowby?
Posted by: Cheese ()
Date: May 23, 2016 07:09PM

MattNall Wrote:
-------------------------------------------------------
> Perhaps....Try a Can of Rislone "Engine
> treatment"...stopped blowby for me recently... $5
> at Walmart
>
> [www.walmart.com]
> a&adid=22222222227017144502&wl0=&wl1=g&wl2=c&wl3=4
> 2976564832&wl4=&wl5=pla&wl6=81468837152&veh=sem


I will give that a try

Matt
63 Vert
Dyer, IN
............................................

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Re: Blowby?
Posted by: MCataldo ()
Date: May 24, 2016 08:02AM

Cheese Wrote:
-------------------------------------------------------
> MattNall Wrote:
> --------------------------------------------------
> -----
> > Perhaps....Try a Can of Rislone "Engine
> > treatment"...stopped blowby for me recently...
> $5
> > at Walmart
> >

I have used "Restore" and like it, also at Walmart (not cheap, though)...

Your noise sounds more to me like a vibration induced rattle rather than a bearing noise. Here are a couple of thoughts I have:
1. Try a new belt. Get the proper wrapped belt from a vendor. (I've been using the NAPA belt, but there are others.) It may track more accurately and reduce the vibration.
2. There are a lot of things in close proximity to the belt path. On my car, the throttle cross shaft was rubbing on the upper belt guide because the guide was bent. Check the clearance of everything in the path including the belt guides, fuel lines where they pass under the belt and any parts near the oil filter and distributor. You may be able to (carefully) grab nearby parts with the engine idling to see if the sound changes.
3. Used Corvairs I've bought have notoriously been missing fasteners, particularly for the sheet metal ("tin") parts. Check for missing bolts, screws and loose items including the throttle linkage and such.

I think you're really close to finding this and likely have already. Good luck.

Mark

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Re: Blowby?
Posted by: MattNall ()
Date: May 24, 2016 08:19AM

"restore" is for worn engines... he says the blowby is getting better as he runs it more and more

MODERATOR
Sea Mountain, between Charleston Harbor and Coos Bay! SW Oregon Coast
Click HERE for My Website...Click HERE for My TechPages!
...............110-PG.................................................Webered-Turbo

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Re: Blower bearing noise?
Posted by: RobertC ()
Date: May 24, 2016 09:42AM

You can try to isolate the noise.

Though you have to careful not to drop it, I have used a long screwdriver to isolate bearing noise.

Also, need to tie back long hair if you have it.

Place the end of the screwdriver on the center of the bearing / end frame of the generator / your ear to the end of the handle.

Never tried using a piece of hose mentioned above.

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Re: Blower bearing noise?
Posted by: Dennis D ()
Date: May 24, 2016 10:07AM

Try a simple thing. Change the belt with a new one. It may be your problem.

Dennis Dorogi
Brocton, NY

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Re: Blower bearing noise?
Posted by: Cheese ()
Date: May 24, 2016 01:33PM

MCataldo Wrote:
-------------------------------------------------------
>Your noise sounds more to me like a vibration induced rattle rather than a >bearing noise. Here are a couple of thoughts I have:
>1. Try a new belt. Get the proper wrapped belt from a vendor. (I've been using >the NAPA belt, but there are others.) It may track more accurately and reduce >the vibration.

Dennis D Wrote:
-------------------------------------------------------
> Try a simple thing. Change the belt with a new
> one. It may be your problem.
>
> Dennis Dorogi
> Brocton, NY

Mark and Dennis may have the answer. I replaced the belt with a Gates wrapped belt and the noise is almost gone. This belt is a lot firmer then the other and is a pain to tighten. Seems like when I let it run for a bit then it works its way in the groves a bit and I can get it tighter. I'll report back later with the results.

Matt
63 Vert
Dyer, IN
............................................

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Re: Blower bearing noise?
Posted by: corventure Dave ()
Date: May 24, 2016 01:53PM

You may have found it. But I would recommend going to an auto parts store and getting a Mechanic's Stethoscope. They are cheap and will allow you to isolate
the location of odd noises.

Corventure Dave

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Re: Blower bearing noise?
Posted by: Cheese ()
Date: May 24, 2016 01:57PM

corventure Dave Wrote:
-------------------------------------------------------
> You may have found it. But I would recommend going
> to an auto parts store and getting a Mechanic's
> Stethoscope. They are cheap and will allow you to
> isolate
> the location of odd noises.
>
> Corventure Dave

Dave, I actually have one. It couldn't pin point the noise. I also borrowed an ultrasonic listening device from work and it couldn't pin point it. All I knew is that it was near the fan area.

The belt was the issue. Thanks everyone for all your input. Now hopefully if someone has this problem in the future I will be able to help them figure it out. You guys are great!!!

Matt
63 Vert
Dyer, IN
............................................

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