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10/24/16 10:10pm - Original Message: 'Fan clutch - how to test, what is correct replacement'
vince vette
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Vette(s):
1980 L82 White with doeskin interior

Joined: 1/5/2016
Posts: 46
After pulling the fan and fan clutch out a while back I set them on a shelf sitting flat with the the mounting flange down.  A few weeks later I found it had leaked at least some of the magic grease out. 

Question 1 - can it work OK with some grease missing? 

Question 2 - if it can, is there a way to check it without putting it in the car an running it? Note: There is some resistance to hand turning the fan when it's bolted to the fan clutch.  

Question 3 - does the fact that grease leaked out indicate bad seals and therefore it just has to be replaced? Note: bearings seem fine as I could not feel any looseness on the shaft.

Question 4 - if it does have to be replaced what is the proper replacement? There seems to be a lot of options out there. The car is a 1980 L82 and thus has a auxilliary electric cooling fan (which to my knowledge only came on once, which was 34 years ago after I shut off the car while parked in a field behind a barn following a few miles of darting around country roads at 3 AM for reasons best left unsaid). The fan is 18.5 inch, 5 blades. Original radiator was triple core aluminum (now copper replacement). I've seen options listed for with and without heavy duty cooling but haven't been able to determine if I have heavy duty cooling. The options I've found are GM p/n 88961768 and 14047080. Below is an image of the original fan clutch. 

Thanks for any guidance you can provide.

 


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As it once looked and hopefully will again
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10/24/16 11:11pm - Reply: 'Re: Fan clutch - how to test, what is correct replacement'
73shark
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Overland Park, KS - USA

Vette(s):
1973 Orange Metallic Coupe (orig owner), L82, 4 spd (WR), PS, (A/C & PW (I installed from wrecked 73)), leather, AM/FM Stereo, ran with '65 FI unit earlier & will again some day.

Joined: 7/9/2003
Posts: 377
I read somewhere a long time ago that the fan should be left in the vertical position when not on the car. I would say to try yours out and see if it still functions.




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1973 L-82 4 spd

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10/25/16 8:08pm - Reply: 'Re: Fan clutch - how to test, what is correct replacement'
vince vette
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Vette(s):
1980 L82 White with doeskin interior

Joined: 1/5/2016
Posts: 46
I'm leaning in that direction

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10/28/16 2:58pm - Reply: 'Re: Fan clutch - how to test, what is correct replacement'
nosal1 Gold Member
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Dunedin, FL - USA

Vette(s):
1980 Corvette Torch Red with Gold metallic 370HP/350 CU.IN.Turbo 350 w/shift kit.Originally CA.Car with 305 CU.IN.

Joined: 3/21/2006
Posts: 228

Vince, If I may suggest you go to Rock Auto to get a fan clutch for your Vette.They have a great assortment and great prices.

I bought one of their listed Fan Clutch several years back and is still doing the job..Just a suggestion..It is too much work to take a chance your clutch is bad and R&R that one when it is not that expensive to replace..
Sal C                              nosal


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