1965 fan clutch

[Ralph A.]

HI everyone I've been a member of NCRS for a couple years but this is the first time I'm asking a ? on this forum. My ? is I'm going to replace my aftermarket fan clutch with an original one, I have a 327 365 HP AC car build date is July 15 65 does anyone have a picture of one that I should have, I hope you can help thanks Ralph

[Joe L.]

Re: 1965 fan clutch

HI everyone I've been a member of NCRS for a couple years but this is the first time I'm asking a ? on this forum. My ? is I'm going to replace my aftermarket fan clutch with an original one, I have a 327 365 HP AC car build date is July 15 65 does anyone have a picture of one that I should have, I hope you can help thanks Ralph

Ralph------


I don't have a photo of an original clutch for your car. I think there might have been at least two that were used, including GM #3814137 and GM #3814560.

However, if you're talking about buying a NEW fan clutch that's exactly the same as original, forget it. Except for a few NOS that might be around selling for BIG $$$$, there are not any.

My recommendation to you is to buy a GM #3916141. This is the closest you can get to the original in a NEW, currently available fan clutch. It will work properly, too.

[Ralph A.]

Re: 1965 fan clutch

Ralph------


I don't have a photo of an original clutch for your car. I think there might have been at least two that were used, including GM #3814137 and GM #3814560.

However, if you're talking about buying a NEW fan clutch that's exactly the same as original, forget it. Except for a few NOS that might be around selling for BIG $$$$, there are not any.

My recommendation to you is to buy a GM #3916141. This is the closest you can get to the original in a NEW, currently available fan clutch. It will work properly, too.

Hi Joe, if I'm going to replace the repo one I would like if i can, replace it with an original one. The # 3916141 is that for BB or for SB or for both thanks

[David L.]

Re: 1965 fan clutch

This is a picture of the the original fan clutch (Schwitzer type) on my 66 Corvette (Feb. 1966) and the stamping on the edge of the hub is "SC 1 26 66". The "THIS SIDE UP" stampings on the spring strip are long gone. The other fan clutch used had a coil spring on the front.

[Ralph A.]

Re: 1965 fan clutch

This is a picture of the the original fan clutch (Schwitzer type) on my 66 Corvette (Feb. 1966). The "THIS SIDE UP" stampings on the strip are long gone.

Dave do you think that would be the same as my late 65 SB

[David L.]

Re: 1965 fan clutch

Dave do you think that would be the same as my late 65 SB

Yes, but you also have the option of finding the type made with the coil spring on the front. The coil spring type looks very similar to the one in the enclosed picture. Note that the two "ears" on the face of the clutch are much smaller than the "ears" on fan clutches made in later years. The NOS 6" dia. fan clutch (ink stamped "FC-15") shown in my picture is not a Corvette clutch but looks very similar to those used in the 1960's.

[Ralph A.]

Re: 1965 fan clutch

Yes, but you also have the option of finding the type made with the coil spring on the front. The coil spring type looks very similar to the one in the enclosed picture.

thanks guys for the info. I'll start looking

[David L.]

Re: 1965 fan clutch

Ralph,
A new GM 3916141 fan clutch (coil type w/ "big ears") is probably the best you can do for a reasonable price. There seems to always be at least one or two on Ebay for about $100 each.
Dave

[Ralph A.]

Re: 1965 fan clutch

Ralph,
A new GM 3916141 fan clutch (coil type w/ "big ears") is probably the best you can do for a reasonable price. There seems to always be at least one or two on Ebay for about $100 each.
Dave

Thanks I'll check out EBay Ralph

[Wayne M.]

Re: 1965 fan clutch

This is a picture of the the original fan clutch (Schwitzer type) on my 66 Corvette (Feb. 1966) and the stamping on the edge of the hub is "SC 1 26 66". The "THIS SIDE UP" stampings on the spring strip are long gone. The other fan clutch used had a coil spring on the front.

Ralph, here is a side view of the type of clutch with the flat bi-metallic element that David L. shows. This is of a '68 CJ ink-stamped hub, which is code for the small block; flange stamped "10.6.68. SC". Key observation is that small block fans had a longer shaft than the big blocks (ie. the 3916141, ink-stamped CK, if from same Eaton supplier). Note measure of 1.8" from flat where fan blade assy. attaches to clutch, to mating surface of clutch hub with water pump pulley. The big block will be 1.5", so the fan will be positioned further back, relative to the shroud. Also note the step in the shaft diameter and the silver paint applied only up to the step, no further (again, only this supplier of clutch).

[David L.]

Re: 1965 fan clutch

Ralph,
As Wayne states the BB clutches have a shorter shaft. Here is some research about Corvette (and Chev.) fan clutches used in the 1960's that I have collected over the years. All are 6" in dia. and have a 3" bolt circle to mount on the fan.

3814137, 60-67 (283,327), believed to be made by Eaton, coil spring type
3814560, 60-67 (283,327), believed to be made by Schwitzer, bar strip type
5389475, stamped "CN", 68 Pass. w/AC (NOT Corvettes), made by Delco Products
3916139, stamped "CJ", 68-69 (327)
3938944, stamped "CS", replacement of 3931004 for 68 Camaro w/AC (350) & 68 Pass. w/AC (327,396)
3857531, stamped "CT", 66-67 (427)
3916141, stamped "CK", 68-69 (427)

[Ralph A.]

Re: 1965 fan clutch

Thanks everyone for the info. Now does anyone know how to get hold of Fred Oliva because phone goes right to voice mail thanks

[Jim D.]

Re: 1965 fan clutch

This is a picture of the the original fan clutch (Schwitzer type) on my 66 Corvette (Feb. 1966) and the stamping on the edge of the hub is "SC 1 26 66". The "THIS SIDE UP" stampings on the spring strip are long gone. The other fan clutch used had a coil spring on the front.

Dave do you think that would be the same as my late 65 SB

That is the same as the one on my 65 built in mid April. However my date is stamped on the back side of the flange 4-5-65.

[Ralph A.]

Re: 1965 fan clutch

That is the same as the one on my 65 built in mid April. However my date is stamped on the back side of the flange 4-5-65.

So i think that the date on a 65 was stamped on the back of the flange and the 66 was on the side of the flange what do you think thanks

[Terry M.]

Re: 1965 fan clutch

I only spent four years in the research field, and we won't talk about how long ago that was -- but allow me to humbly suggest that your sample size is too small to draw any reasonable conclusions.