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aircooled Samba Member
Joined: December 02, 2003 Posts: 1290 Location: Heartland, Neb
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Posted: Mon Apr 25, 2011 10:45 am Post subject: 67 Fan Shroud Noise |
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I just replaced my engine oil cooler and a new noise coming for the fan area of the shroud. When I take the belt off of the gen the noise stops. The noise sounds like I have a super charger on the engine. It would be nice to have something like that but that isn't the case.
If the fan did get bent slightly that could be the noise I'm hearing. Before I changed to oil cooler everything sounded normal.
When replacing the fan in the engine shroud I have heard about some fans having welded fins. Are there improved aftermarket shroud fans or should I use a stock replacement fan? _________________ 67 Sun Roof / Born Sept 66 / Second Owner
67 Convertible / Born Aug 66 / Second Owner
Member of 67 Posse
Omaha Volkswagen Club
Neb VVWCA Chapter Rep
Volkswagen Club of Nebraska |
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KTPhil Samba Member
Joined: April 06, 2006 Posts: 34003 Location: Conejo Valley, CA
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Posted: Mon Apr 25, 2011 10:49 am Post subject: |
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First try re-seating the generator on the pedestal. Loosen the band clamp ("there was this time in band clamp...") and shove the gen forward or backward a bit, and see if the noise stops. Also check your gen brushes; they can make funny noises if worn or seated wrong, and they might have been jostled when you put the gen back on.
Last edited by KTPhil on Mon Apr 25, 2011 4:40 pm; edited 1 time in total |
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drscope Samba Member
Joined: February 19, 2007 Posts: 15273 Location: Baltimore, Maryland USA
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Posted: Mon Apr 25, 2011 4:30 pm Post subject: |
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Could also be a bad bearing. If you had the belt too tight when you put it back together.... _________________ Mother Nature is a Mean Evil Bitch! |
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Beanery69 Samba Member
Joined: November 15, 2003 Posts: 343 Location: Greeley Co
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Posted: Mon Apr 25, 2011 10:13 pm Post subject: |
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Did you check the back to see if you sucked in something? Rag paper towel? _________________ To Many cars, Just ask my wife!! |
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aircooled Samba Member
Joined: December 02, 2003 Posts: 1290 Location: Heartland, Neb
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Posted: Mon May 02, 2011 4:29 am Post subject: |
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Problem solved!!! Pulled the engine Saturday and reinspected the shroud, fan, and veins in the shroud and found nothing wrong. Next I reinspected the new oil cooled I had installed this winter. The new cooler matched up to the original one in size and shape. However, the metal screen on the side of the cooled had about gap of about 1/8 inch on side and on the original one the screen was flat against the veins. So I reinstalled the old cooler which had nothing wrong with it in the first plan.
Got everything back together Saturday afternoon, and fired up the engine and the noise was gone. So what was happening was the air from the fan was getting behind the metal screen and causing the "roar" air noise I was hearing.
Took I took the car out for our Spring Cruise yesterday and the car ran great!! _________________ 67 Sun Roof / Born Sept 66 / Second Owner
67 Convertible / Born Aug 66 / Second Owner
Member of 67 Posse
Omaha Volkswagen Club
Neb VVWCA Chapter Rep
Volkswagen Club of Nebraska |
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skabonner Samba Member
Joined: May 12, 2009 Posts: 854 Location: La Habra, Ca
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Posted: Mon May 02, 2011 4:40 pm Post subject: |
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KTPhil wrote: |
First try re-seating the generator on the pedestal. Loosen the band clamp ("there was this time in band clamp...") and shove the gen forward or backward a bit, and see if the noise stops. Also check your gen brushes; they can make funny noises if worn or seated wrong, and they might have been jostled when you put the gen back on. |
Awesome fix. My shroud has been making noise for months, and I thought I would have to fix it next time I pulled the engine, but This worked perfectly. _________________
Douglas Adams wrote: |
A common mistake that people make when trying to design something completely foolproof is to underestimate the ingenuity of complete fools. |
'68 Beetle "Sadie" (R.I.P.)
'67 Beetle "Ilsa"
'06 Gti "Heidi" |
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