RE: Fan noise, after fan clutch swap
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RE: Fan noise, after fan clutch swap - 7/11/2008 9:57:10 PM
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pg
Posts: 1066
Joined: 8/7/2006
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Hi Flying Low, The basic test for the thermo clutch is to start the car when cold, let it run for 2 minutes and stop the motor and see how much resistance you get when you try to turn the fan blanes, then restart the car and run it for 10 minutes ( untill hot ) then stop the motor, you should have more resistance now.
After trying 4 clutches I''ll guess that yours is good.
If you still think it is to loud then you''ll have to try a 5 blade fan. PG.
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RE: Fan noise, after fan clutch swap - 7/12/2008 12:02:48 PM
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pg
Posts: 1066
Joined: 8/7/2006
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C3 Starship just brought up a good point! He says to check the line up of the fan blades. 1 or 2 may have inadvertantly got bent when the fan was removed, that could cause extra noise.
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RE: Fan noise, after fan clutch swap - 7/12/2008 6:35:19 PM
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Flying Low
Posts: 111
Joined: 9/13/2007
Status: online
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I will look at that, Thanks for all the help guys.
A grinding wheel balancer might tell me alot about that fan.
David
< Message edited by Flying Low -- 7/12/2008 6:41:50 PM >
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RE: Fan noise, after fan clutch swap - 7/13/2008 9:49:18 AM
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73shark
Posts: 1130
Joined: 4/18/2006
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Sounds like clutch is always locked up then.
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RE: Fan noise, after fan clutch swap - 7/13/2008 7:58:05 PM
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Flying Low
Posts: 111
Joined: 9/13/2007
Status: online
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Ran the car for two minute checked resistance, then at ten minutes, no diference. after two minutes I cut it off. fan stopped dead.no free spin. I think that confirms it is locked up.
C3 , I did check the fan blades, they were all within about
.060", thanks.
David
< Message edited by Flying Low -- 7/13/2008 8:09:11 PM >
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Never too old to have fun!
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RE: Fan noise, after fan clutch swap - 7/14/2008 4:37:28 AM
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Texas Jim
Posts: 451
Joined: 12/15/2005
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So, does this mean that you have a bad (defective) fan clutch?
There''s such little area for air to get to the front of the radiator in our C3s. I know that when I''m working on my ''Vette, and open the throttle all the way very quickly, I get that "wooshing" sound from the fan even just prior to the secondaries starting to open. Ofcourse at that second, it''s time to close the throttle so I don''t over-rev the engine. But that fan/clutch combo, even when it''s working right, is a noisy joker anyway in our C3s, compared to other vehicles. I suppose it makes sense, that body set-up with the small air passages calls for a heavy-blowing fan/clutch combo.
Please let us know the final outcome of your "fan/clutch" situation. Good Luck and thanks for sharing.
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RE: Fan noise, after fan clutch swap - 7/14/2008 5:24:03 AM
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Rich G.
Posts: 109
Joined: 1/12/2007
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Maybe it noisy now because the old one wasn''t turning the fan fast enough to make noise.
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