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> Loose fan belt on /6, and only one day till WCR
PanelBilly
post May 17 2016, 07:13 PM
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Nate took care of adjusting the valves on my engine Monday and noticed that my fan belt was loose. He didn't have the tool for holding the outside half of the pulley, but I did at home.

So, tonight I pulled off the pulley and found that the mounting hole that should have been round with 2 flat sides had become just round.
A call to John Walker in Seattle confirmed that this is a result of the bolt not being on tight enough. The outer pulley is toast now,
but John said he had a used one I can pick up tomorrow. The worst of the news is that the inner half of the pulley is also the fan
and that I've got some grooves cut into it from the friction. I think I can make it work for now. I hope so

Inner half of pulley that is part of the fan

Attached Image

The outer half of the pulley that was slipping

Attached Image
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mepstein
post May 17 2016, 07:28 PM
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The fan side is pretty thick. You should be ok. Good thing you caught it now.
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type2man
post May 17 2016, 07:28 PM
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If you put more shims , then the outer half of the pulley will contact the good area of the fan that is not worn out. Belt might be loose but the pulley wont fall apart. I think you can shim the fan so it sits higher and the belt can be tighter and you should be good to go.
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r_towle
post May 17 2016, 07:30 PM
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Wtf are those pieces?
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PanelBilly
post May 17 2016, 09:27 PM
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The second one is scrap metal now
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brant
post May 17 2016, 09:55 PM
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No blinking alt light? That is bad. Did it slip?
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r_towle
post May 17 2016, 09:58 PM
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Seriously, what are the metal wires?
My 3.2 is loose.....thought it was just shims...
Like all the other aircooled ones I have ever touched.
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SirAndy
post May 17 2016, 10:04 PM
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QUOTE(r_towle @ May 17 2016, 08:58 PM) *
Seriously, what are the metal wires?

It's his girlfriends fancy hand mirror ..
(IMG:style_emoticons/default/biggrin.gif)
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2mAn
post May 17 2016, 10:05 PM
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QUOTE(PanelBilly @ May 17 2016, 08:27 PM) *

The second one is scrap metal now


You should clean it, throw a chain through it and wear it like a necklace at WCR
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r_towle
post May 17 2016, 10:08 PM
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QUOTE(SirAndy @ May 18 2016, 12:04 AM) *

QUOTE(r_towle @ May 17 2016, 08:58 PM) *
Seriously, what are the metal wires?

It's his girlfriends fancy hand mirror ..
(IMG:style_emoticons/default/biggrin.gif)

Doh!

I did not see that...
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PanelBilly
post May 17 2016, 10:09 PM
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I'm using a mirror from the bathroom and the wires are part of the mirror. It an illusion. Walker said there should be about a half an inch of deflection in the belt. Also that if I try to turn the fan blades it should be difficult because of the tension. I have a digital volt meter and is was showing a charge the whole time.
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Dominic
post May 17 2016, 10:55 PM
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Not sure if this would cure your problem but Rothsport makes a real nice billet aluminum outer pulley half...

http://www.rothsport.com/Products/Engine/F...911-(65-75).htm
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6freak
post May 18 2016, 09:28 AM
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QUOTE(PanelBilly @ May 17 2016, 09:09 PM) *

I'm using a mirror from the bathroom and the wires are part of the mirror. It an illusion. Walker said there should be about a half an inch of deflection in the belt. Also that if I try to turn the fan blades it should be difficult because of the tension. I have a digital volt meter and is was showing a charge the whole time.

easy fix billy get the parts ill come help you tonight after i get loaded
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Chris H.
post May 18 2016, 01:49 PM
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QUOTE(r_towle @ May 17 2016, 11:08 PM) *

QUOTE(SirAndy @ May 18 2016, 12:04 AM) *

QUOTE(r_towle @ May 17 2016, 08:58 PM) *
Seriously, what are the metal wires?

It's his girlfriends fancy hand mirror ..
(IMG:style_emoticons/default/biggrin.gif)

Doh!

I did not see that...


I know...I was like WTF is that wire clippy thing (IMG:style_emoticons/default/confused24.gif) ?
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Cairo94507
post May 18 2016, 03:40 PM
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Get loaded.... (IMG:style_emoticons/default/beerchug.gif)
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rgalla9146
post May 18 2016, 04:50 PM
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I'd remove the fan, weld the damaged areas, grind, file, reassemble.
New outer pulley too.
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jcd914
post May 18 2016, 05:49 PM
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I don't know if it is my eyes or your picture but I don't see enough damage to the inner pulley half/fan to be concerned with.

Make sure you have enough pulley shims in place when you put it back together.
Without enough shims, the cupped washer can bottom out on the pulley hub and not hold the outer pulley half in place tightly.

There is a minimum number of shims required, I don't remember the number.

Jim
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PanelBilly
post May 18 2016, 08:15 PM
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Got a new outer pulley and a new belt from John. He also gave me a lesson in how to do it. Turns out that the belt I had on it was too big. Got it all together now and it's working.


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Dave_Darling
post May 18 2016, 08:51 PM
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QUOTE(jcd914 @ May 18 2016, 04:49 PM) *

There is a minimum number of shims required, I don't remember the number.


The "extra" shims go on the outside of the pulley, between the outer half and the nut. Failing to do that can cause problems... I forget what they are, but at the very least I could see the possibility of running out of threads.

--DD
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zambezi
post May 18 2016, 09:46 PM
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This is a common problem in the 356 world. The 356 pulleys require 10 shims total. If you only need 5 shims to get a tight belt, then the other 5 shims HAVE to go on the outside of the pulley or the nut will not clamp the whole assembly properly and the pulleys will self destruct after not long.
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