1979 fan clutch
Thread Starter
Melting Slicks
Joined: Mar 2002
Posts: 2,164
Likes: 7
From: Beringen
1979 fan clutch
I have some problems related to my fan clutch. This is a non air 79. The water pump in there is a stewart stage 3 short pump.
The clutch that was sent to me, has a shorter axle and my original doesn't go on completly. The short clutch does.
What is wrong and what clutch would actualy fit. I suppose the short new one, will be to short causing the fan to run outside the shroud right ? I can't fit it right now, since my body is still not on the car.
I went over several catalogs, but everyone seems to list a different unit or suggest the same clutch for all cars...
The clutch that was sent to me, has a shorter axle and my original doesn't go on completly. The short clutch does.
What is wrong and what clutch would actualy fit. I suppose the short new one, will be to short causing the fan to run outside the shroud right ? I can't fit it right now, since my body is still not on the car.
I went over several catalogs, but everyone seems to list a different unit or suggest the same clutch for all cars...
Thread Starter
Melting Slicks
Joined: Mar 2002
Posts: 2,164
Likes: 7
From: Beringen
Thread Starter
Melting Slicks
Joined: Mar 2002
Posts: 2,164
Likes: 7
From: Beringen
Diameter of waterpump axle is correct in both cases. The short clutch slides on all the way. The long one doesn't. The long one is the one that came with the car. It's an Delco, so could still be the original. However the hole for the waterpump axle is not deep enough in the long one.
Race Director
Joined: Jul 2001
Posts: 15,892
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Diameter of waterpump axle is correct in both cases. The short clutch slides on all the way. The long one doesn't. The long one is the one that came with the car. It's an Delco, so could still be the original. However the hole for the waterpump axle is not deep enough in the long one.
Race Director
Joined: May 2006
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From: Dayton, Ohio
Race Director
Joined: Mar 2006
Posts: 14,112
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From: Florida
You pump should be correct.
The distance from the block mounting surface to the clutch mounting surface should be 5.795" for a small block.
Your short clutch pictured looks correct.
Stewart pump work very well.
The distance from the block mounting surface to the clutch mounting surface should be 5.795" for a small block.
Your short clutch pictured looks correct.
Stewart pump work very well.
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Thread Starter
Melting Slicks
Joined: Mar 2002
Posts: 2,164
Likes: 7
From: Beringen
Hm, another question, how deep sits the fan in the shroud on an L82 1979 ?
With this short style clutch i guess it would sit half in, half out.
As for the heavy duty. The car doesn't have AC, so i don't think originally it came with a HD clutch.
With this short style clutch i guess it would sit half in, half out.
As for the heavy duty. The car doesn't have AC, so i don't think originally it came with a HD clutch.
Last edited by Belgian1979vette; Aug 6, 2011 at 08:47 PM.
