Cadillac Flathead

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Entropy
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Cadillac Flathead

Post by Entropy » Mon Jan 11, 2021 9:17 pm

I recently picked up this flathead Cadillac at a local estate sale. I’m a ford flathead enthusiast and had been on the hunt for another one for a hot rod project when I came across this and fell down the rabbit hole. My understanding was that the wealthy owner had a small private collection/museum, though not really military oriented. The gentleman who maintained his collection told me that the owner purchased the engine as surplus, years before, from the Red River Ordnance Depot in Texarkana Tx. To his knowledge it had never been run and simply sat as a static display in his bosses collection. I really couldn’t find a tremendous amount of information about it, at least compared to the Fords I usually dabble in. My web search led me here after seeing a series of posts by “dlevy”. I figured I should post some pictures to share and learn. Pending the completion of a couple other projects I would like to get it running. I’ll try to document it when I get there. Any information you’d be willing to offer would be appreciated. Thanks
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W. Winget
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Re: Cadillac Flathead

Post by W. Winget » Tue Jan 12, 2021 7:24 am

See how many M5 Stewart and M24 Chafee Tank owners contact you now, that's what went in them.
"Twin Cadillac Series 44T24; 220 hp."
Lovely piece, I would like one in my shop.
V/R W. Winget
Looking for 1918 Standard B 'Liberty' truck parts

brian in denver
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Re: Cadillac Flathead

Post by brian in denver » Tue Jan 12, 2021 11:25 am

not to mention LVTs

dont suppose anybody know where to find water pump rebuild kits.

and no the civi ones dont work.

BB
keeping it strac here boss
I hate aquaphobic horses ;)

Entropy
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Re: Cadillac Flathead

Post by Entropy » Tue Jan 12, 2021 5:23 pm

Are the civilian gasket kits compatible with the military version? Any sources you would recommend?

Kim Sievert
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Re: Cadillac Flathead

Post by Kim Sievert » Thu Jan 14, 2021 12:52 am

It has civilian heads
Engine block is for a Stuart (1G)
Water pump is facing the correct way for a Stuart.
Transmission and linkages look to be for Stuart.
Cannot tell if distributer support has a place for RPM cable to attach (Stuarts have a RPM cable attach point)
Standard gasket set for a 1940 1941 Cad 346 engine is available (Gaskets made by Best Gasket on Ebay)
A water pump rebuild company, might have to do rebuild.
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Entropy
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Re: Cadillac Flathead

Post by Entropy » Thu Jan 14, 2021 6:34 am

Here’s one that shows the distributor a little better. Does the fact that it has civilian heads refute the story that he bought it as surplus directly from Red Stone? Is it likely the military would have resorted to using civilian heads when the engine was reconditioned? One thing I neglected to ask his mechanic about was the paint job. It appears to be a little too perfect and a little too bright green for having been done in 1945.
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Entropy
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Re: Cadillac Flathead

Post by Entropy » Thu Jan 14, 2021 7:30 am

I guess I should back up and ask what is it about the heads that indicate they are civilian? It appears to have the extra port (plugged) that the civilian heads didn’t have per dlevy’s post, or am I interpreting his diagram incorrectly? I’ve circled it in black on the photo. viewtopic.php?f=82&t=232831&hilit=stuar ... d&start=45
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Entropy
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Re: Cadillac Flathead

Post by Entropy » Thu Jan 14, 2021 7:32 am

Is there there any way to discern the engine’s original date of production from the numbers on the block?


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