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Mid Century Cadillac Discussion / Re: Six Bladed Fans
« Last post by Lexi on March 15, 2019, 08:26:51 AM »
Thanks Jose. I think the spacer was only used with a double grooved fan hub pulley, (non-AC cars), so the 2 belts would line up. The tripled grooved fan hub pulley did not need one because it is a larger, longer unit, so the 3 fan belt alignment was OK. That is my best guess. You are right, there does not seem to be any mention in the MPLs for the apparent "one off" six bladed fan for 1956. My car is basically a survivor that has more or less been maintained. So I am guessing the fan on the left is the original fan. Perhaps of interest to those with '56s as to what that part looked like. Clay/Lexi
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Mid Century Cadillac Discussion / Re: 1956 AC bracket
« Last post by Lexi on March 15, 2019, 08:12:47 AM »
Jose thanks. More painting to do! Clay/Lexi
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Mid Century Cadillac Discussion / Re: Six Bladed Fans
« Last post by JAG56Cad on March 15, 2019, 08:12:18 AM »
Clay,

I also bought a 6 blade fan which in now on the car, if I recall it was listed for either a 57 or 58 and it looks like the one on the right side on your picture with 4 blades width and rounded rivets heads.

Im not sure if the one on the left side may well be the one listed under the Serviceman for the special fixes with 56 A/C since that part # is not listed on the later MPLs.  ???

The one I have come with the spacer which it was not needed in my case but yes the 6-blade fan seat much close to the radiator than the original 4-blade fan. Also, my radiator is mounted inside the rail and bolted from the engine side, so it was modified from the original position of bolting it from the front, much easier to get to it when needed.  ;)
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Mid Century Cadillac Discussion / Re: 1956 AC bracket
« Last post by JAG56Cad on March 15, 2019, 07:10:56 AM »
Does anyone know what the color of the AC compressor mounting bracket was for a '56 Cad? Clay/Lexi

Clay,

They are both front and rear standard black same as the compressor.
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Mid Century Cadillac Discussion / 1956 AC bracket
« Last post by Lexi on March 15, 2019, 12:29:12 AM »
Does anyone know what the color of the AC compressor mounting bracket was for a '56 Cad? Clay/Lexi
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Looking for a couple of original service port caps for the my a/c system. They are both threaded the same size on each side of the a/c manifold valves and I'm told they were metal caps that were squared off in appearance. Thanks for the help.
Chuck
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Mid Century Cadillac Discussion / Re: Six Bladed Fans
« Last post by Lexi on March 14, 2019, 02:02:39 PM »
Good point, but there is no shroud in a '56. So my thinking is the greater diameter, wider fan blades and slightly closer mount to the rad should result in the fan moving more air. That would be a good thing. The only semblance of a fan shroud in '56 was a rubber strip which helped to seal the hood (when closed) to the upper rad support area. Think it was to direct the in flowing air through the rad rather than have some of it lost by going over top of the radiator. But no fan shroud. Clay/Lexi
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Mid Century Cadillac Discussion / Re: Six Bladed Fans
« Last post by Cattle Axe on March 14, 2019, 12:33:21 PM »
Will the bigger one fit in the shroud?
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Mid Century Cadillac Discussion / Re: Cadillac U-Joints
« Last post by Lexi on March 14, 2019, 11:44:35 AM »
Bob here is a photo of an NOS one from the 50s or the 60s. Looks like the center to center measurement is the same as the one in the David King posting at 1 7/16 inches. Clay/Lexi
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Mid Century Cadillac Discussion / Six Bladed Fans
« Last post by Lexi on March 14, 2019, 10:59:35 AM »
Discussions regarding the Cadillac 6 bladed fan come up from time to time in the Forum. So now that I got mine out for painting for my engine rebuild, I compared it to another alleged Caddy fan your information and also comments.

My '56 has a six bladed fan which I assume is factory original. There does not appear to be a listing for the fan in the 1956 (March) Master Parts List, probably because it was introduced August 15, 1956 as per Cadillac Serviceman Supplement No. 3. The fan was listed as Part No. 1464740, intended for cars equipped with AC. Use of the fan was restricted to customers who complained of overheating with their (only AC equipped) '56 cars. So it looks like this was a "secret warranty" deal as no costing was noted. The 1959 MPL also does not list this part number, but it does list a 6 bladed fan and provides 2 apparent part numbers (but both are different from the '56 number). 7 bladed fans are also listed for model year 1959.

I have an extra 6 bladed fan here and compared it to the one I removed from my car. Just wanted to decide which was best to media blast and paint before installation. I have never compared both fans but once out of the car I observed that both are different. See attached image.

On the left is the unit removed from my car, (which has factory AC). Note the flat rivets and the more narrow in width vanes, (3.5 inches). Fan bolt mounting holes are capsule in shape, and appear to have been drilled by the factory. Overall width is 17 inches.

The fan on the right is said to have come from a '58 Cadillac. Note the domed rivets and the wider vanes, (4 inches). The fan bolt mounting holes are circular. When both are lying on the ground the '58 fan sits a little higher. Overall width is greater at 17 3/4 inches. I imagine this fan would draw more air.

Both fit the 1956 fan pulley hub.

Is the fan that came from my car an original '56 fan? I ask as I found it odd to have those different shaped mounting bolt holes, as if it were meant to fit other makes and models? While very similar in appearance, could it be after market? What do fellow members have on their cars? The AC system on my car appears all original. Is the other fan really from a '58? I usually stick to original parts and a stock look, but I am thinking of installing this '58 fan to keep the engine cool. I also hope that there is no impact on cooling because the fan will be sitting marginally closer to the radiator. Any comments? Clay/Lexi
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