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carterzest Samba Member
Joined: January 22, 2008 Posts: 3842 Location: Eagle, ID/Sun Valley, ID
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Posted: Sun Jun 06, 2010 11:42 pm Post subject: Fan shroud rattle |
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Fan shroud rattle...Doghouse, broken fin or????
Since my summer 09 trip back from a fantastic 2 1/2 weeks at the Oregon Coast when my departure day was 107 Fh, I developed a mildly annoying rattle, especially at idle.
Confirmed today that it appears to be in the back of the cooling shroud. I am certain I need to pursue the four bolt + harness + motor pull to diagnose...
Any suggestions for other things to look at?
At first I thought it was an exhaust rattle, but, today, we confirmed that it appears to be the tin at the back of the cooling shroud.....
I have many extra parts to add if/when the imminent motor pull happens the next time, but, my 181 has been running just sweet and trouble free before this with beyond regular maintenance and love.
Thanks in advance for your kind replies _________________ Happiness=Portland, Oregon in the rearview mirror! |
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Ian Epperson Samba Member
Joined: January 12, 2005 Posts: 2262 Location: Alameda, CA
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Posted: Mon Jun 07, 2010 9:55 am Post subject: |
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I've been able to pull the gen/alt without pulling the motor with the stock shroud, but it's not easy. Pulling the motor is the way to go.
Guesses:
- Loose bolt for the tin somewhere (doghouse exit?).
- Something sucked into the fan and is rattling against the shroud.
- Fan spinning loose on the shaft.
Before driving it much farther, I'd check to make sure the fan is secure and not causing this rattle. That could be catastrophic. _________________ VW-181 shirts and stickers.
http://ian.epperson.com/vw |
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crofty Judas of the North
Joined: August 09, 2000 Posts: 19670 Location: Land of Whine and Phonies
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Posted: Mon Jun 07, 2010 10:15 am Post subject: |
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It could be your thermostat flaps as well. _________________ Your Vanagon sucks, Stop waving at me.
HamburgerBrad wrote: |
I slept on crofty's tent once. I passed out drunk from two bottles of Everett's brother's wine. |
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carterzest Samba Member
Joined: January 22, 2008 Posts: 3842 Location: Eagle, ID/Sun Valley, ID
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Posted: Mon Jun 07, 2010 11:27 am Post subject: |
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Cool guys, thanks. _________________ Happiness=Portland, Oregon in the rearview mirror! |
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74 Thing Samba Member
Joined: September 02, 2004 Posts: 7370
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Posted: Mon Jun 07, 2010 1:26 pm Post subject: |
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Disconnect the fan belt first and fire it up to see if the sound goes away before going through all that work. |
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carterzest Samba Member
Joined: January 22, 2008 Posts: 3842 Location: Eagle, ID/Sun Valley, ID
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Posted: Tue Jun 08, 2010 5:04 pm Post subject: |
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74 Thing wrote: |
Disconnect the fan belt first and fire it up to see if the sound goes away before going through all that work. |
Will do, good idea!
We are 99% sure it is in the shroud as when you pull back on while revving the engine, the noise(much of it) goes away. The fan belt is a 2 minute check though and I will do that. _________________ Happiness=Portland, Oregon in the rearview mirror! |
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volkaholic1 Samba Member
Joined: October 31, 2004 Posts: 781 Location: ohio
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Posted: Mon Jun 14, 2010 8:01 am Post subject: |
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You could have something in the fan, with the engine OFF, reach in and see if a beer can, bird nest, mouse home or something is in the fan.
I had a fan crack around the mounting bolt, it could then wobble around.
You could have had a fin come loose or off of the fan and it would be rubbing.
Maybe something with the thermostat flaps. _________________ Volkaholic |
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