Is this an original assembly line fan clutch for a 69 L71

[Lawrence S.]

This is off my car and did not know if this was original or not?

[Ed S.]

Re: Is this an original assembly line fan clutch for a 69 L71

Lawrence - there was a great article on mid-year fan clutches that appeared in the Kansas City Chapter news letter back in 2012. The article has been reduced to a PDF and is available for reading at the link below. Info in the article might help you answer your question. Discussion on Scwitzer units begins on page 3.

https://www.ncrsmac.org/ed/Engine/Fan%20Clutches%20-%20C2s.pdf

[Jeffrey S.]

Re: Is this an original assembly line fan clutch for a 69 L71

The configuration appears to be an original Sweitzer unit. There should be some stampings along the edge of the mounting flange. Usually it has "SC" for Sweitzer, and a date code. Check to see if the date lines up with the production of your car. If it does then it most probably is original to your car.
Jeff

[Mike E.]

Re: Is this an original assembly line fan clutch for a 69 L71

That article does not extend to C3 applications, so info on shaft length, etc is not apropos for a ‘69. It is a very helpful article, though. Thanks for citing it!

Lawrence - there was a great article on mid-year fan clutches that appeared in the Kansas City Chapter news letter back in 2012. The article has been reduced to a PDF and is available for reading at the link below. Info in the article might help you answer your question. Discussion on Scwitzer units begins on page 3.

https://www.ncrsmac.org/ed/Engine/Fa...%20-%20C2s.pdf

[Joe L.]

Re: Is this an original assembly line fan clutch for a 69 L71

This is off my car and did not know if this was original or not?

Lawrence------

The fan clutch pictured is a GM #3937771. It's the fan clutch likely originally used for your application. If the date works for the car's build, then it's likely the original clutch.

[Jimmy G.]

Re: Is this an original assembly line fan clutch for a 69 L71

Check the date on the flange to verify the production date

[Lawrence S.]

Re: Is this an original assembly line fan clutch for a 69 L71

Yep original fan clutch. Check out the date on the base.

[Jimmy G.]

Re: Is this an original assembly line fan clutch for a 69 L71

Must be an early car

[Lawrence S.]

Re: Is this an original assembly line fan clutch for a 69 L71

Yea, September 68 car, you have not seen this car Jimmy. Original Paint L71 Fathom Green, Saddle Roadster, 25K miles with a tank sticker, 4.11's Just a neat driver with side pipes...which were added.