I have a clutch fan that I'm not sure of what it's for. It's the bi metallic strip design with the "this side up" printed on it the numbers on the flange look to be K2878SC. CK printed stamp on it. The measurement from the edge of mounting flange to machined area around fan stud is 1.5" Looking at the JG, doesn't seem to be correct for my 63 but don't know what it's for. Any help would be greatly appreciated. Thx!
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Re: Need help identifying clutch fan
Just took a closer look at the number on this clutch fan and think that it could be K2873SC. Think this is the date code but how can you identify the application?
Again...Thanks. -
Re: Need help identifying clutch fan
It may be a late 1973 date and they were like your description. What is the diameter of the mounting hub?Lyle
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Re: Need help identifying clutch fan
The diameter of the bolt flange is 2 5/16. The bolt pattern dia. is correct for my car even thought the part is wrong. I know I have to find a correct clutch for my car. It just would be nice to determine what this is for. Could possibly trade. It's in great shape.Comment
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Re: Need help identifying clutch fan
Primo-----
The stamped "CK" is the identifier. This identifies a GM #3916141 fan clutch. The one you have is a Sweitzer-manufactured piece as opposed to the more common Eaton-manufactured 3916141.
The GM #3916141 was originally used for some 1968-70 big blocks. Later, it became the SERVICE clutch for all 1960-70 Corvette applications. It probably ended up on your car way back in the day when Sweitzer was still manufacturing the 3916141 for SERVICE. The 3916141 is still available in SERVICE from GM, but for at least the past 25 years, it's been only the Eaton version of it.In Appreciation of John HinckleyComment
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Re: Need help identifying clutch fan
Joe, Thanks for the reply. Your information makes sense. The fact that it's dated '73 probably makes it a service part. The only question is would it have been common to supply a service clutch with the "depth of 1.5" when the original part (per the JG) should be 1.8"? Guess it would still work and that's probably the basis of a multi use part for service applications? I'll probably use this one until I find the correct one. At least I have something to use and i'm sure that the correct for my car will be pricey just like everything else is for it. Would you know how difficult and rare/expensive the orignal ones are?
Thanks again!Comment
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Re: Need help identifying clutch fan
Primo------
The last 1960-1967 Corvette small block fan clutch, GM #3814560, was discontinued from SERVICE in May, 1973 and replaced by the GM #3916141, the fan clutch originally used for some 68-69 big block applications.
Incidentally, the last 1968-70 small block fan clutch, GM #3916139, was discontinued from SERVICE in January, 1974 and also replaced by the 3916141.
The 3916141 is still available from GM to SERVICE all 1960-70 Corvette applications. Of all the many different fan clutches used on Corvettes over the 1960-70 period, the Eaton-manufactured version of the 3916141 is the ONLY "survivor". But, it's survived for almost 42 years now, albeit its configuration has changed a bit over the years.In Appreciation of John HinckleyComment
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