Question: 1940 Ford Radiators.

[Ken/Alabama]

The radiator in my 39 Zephyr isn’t a pressure system either. The water pump guy ( Skip Haney ) sells a 4 pound pressure relief that clamps to the end of the overflow tube and that’s what I put on my Zephyr. Works great.

[V8COOPMAN]

Originally Posted by Kube

Taller and a bit narrower.
Think about this for a moment... IF they were the same, why would Ford have changed them for '41? Don't ya think they'd simply keep installing the 39/40 piece?

Originally Posted by Kube

A BIT narrower.

For whatever it's worth, here are a couple of pics that I ran across. The first is a "91A-8005" '39 and '40 PASSENGER CAR radiator. The second is an "11A-8005" '41 PASSENGER radiator...…..FWIW! DD








……………….

[ford38v8]

Originally Posted by V8COOPMAN

For whatever it's worth, here are a couple of pics that I ran across. The first is a "91A-8005" '39 and '40 PASSENGER CAR radiator. The second is an "11A-8005" '41 PASSENGER radiator...…..FWIW! DD








……………….

A girl once told me I was tall. What she really meant was she thought i was skinny.

[JWL]

I think Kube might be missing the fact that this is a 41 pickup truck. Which, in my experience has the same radiator as the 40. I know I took the radiator from my 41 pickup and used it in my 40 sedan for some time.

[Kube]

Originally Posted by Mart

Can I get a clarification on something. I just looked and most images of 1941 (emphasis on the 1) pickups show what appears to be a conventional looking cap top center of the radiator. Can anyone tell me if that cap is a pressurised cap or just a filler cap with no pressure mechanism??

Mart.

Mart, I did apparently get a little goofed from the get - go on this thread.

Okay, here we go:
The '39 dlx, '40 passenger and light truck and '41 light truck used the same (91A) radiator.
The '41 passenger cars used a DIFFERENT (11A) radiator.
I apologize if this caused any issues.

None of the aforementioned radiators were pressurized when they left the assembly line.

[Mart]

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Thanks Mike. I'm going to repair the split seam on mine and make it run non pressurised. It doesn't tend to overheat so I'll give it a go. I'm not sure but I suspect the 4 lb cap is longer than it should be to match the neck so it might be pressuring higher than 4 lbs.

I think that is why it is balooning up and causing the split.

Mart.

[Kube]

Originally Posted by Mart

Thanks Mike. I'm going to repair the split seam on mine and make it run non pressurised. It doesn't tend to overheat so I'll give it a go. I'm not sure but I suspect the 4 lb cap is longer than it should be to match the neck so it might be pressuring higher than 4 lbs.

I think that is why it is balooning up and causing the split.

Mart.

Mart, If you need an authentic 91A replacement tank, let me know. Yours for the ride.

[philipswanson]

Kube,

Will the 91A tank fit on a 41 radiator?

[Ken/Alabama]

I put a new radiator in my 40 Coupe last year . It has the 91 stamped in the top tank and the height is just like the 39-40 but the cap is located in the center and is set up for a pressure cap . The Green Book says it’s a service replacement.

[V8COOPMAN]

Originally Posted by Ken/Alabama

I put a new radiator in my 40 Coupe last year . It has the 91 stamped in the top tank and the height is just like the 39-40 but the cap is located in the center and is set up for a pressure cap . The Green Book says it’s a service replacement.

Ken....Is it stamped "91A-", or "91C-"? The literature I have shows that all the pick-ups through at least '52 as having the fill cap opening in the center of the top tank. DD

[Kube]

Originally Posted by Ken/Alabama

I put a new radiator in my 40 Coupe last year . It has the 91 stamped in the top tank and the height is just like the 39-40 but the cap is located in the center and is set up for a pressure cap . The Green Book says it’s a service replacement.

That would be correct. And usually, the replacement is not split core.

[Kube]

Originally Posted by philipswanson

Kube,

Will the 91A tank fit on a 41 radiator?

Couldn't tell ya. I doubt it...

[Mart]

Originally Posted by Kube

Mart, If you need an authentic 91A replacement tank, let me know. Yours for the ride.

Thanks Mike, that's very generous of you. I'll hold off on that, though, while I try and repair mine. I need some soldering practice.

Thanks again.


To update on my situation and the reason I asked the question in the first place, My tank is balooning out due to excess pressure. I have a 4lb cap but I think it is too long and is overpressuring the radiator.

I will try another new cap and will repair the tank. I will add two cross braces to resist outward movement of the top tank sides. I'm waiting for some parts to arrive so I can do the job.

I think it will be ok if the pressure is genuinely held at 4 lbs and the cross braces will help.

I'll make a little video showing what I did.

Cheers!

Mart.

[TJ]

cancel post.

[Terry,OH]

1940 60HP radiator.

[Mart]

That's interesting, never seen one like that. Can anyone tell me if that thick-ish pad on the mounting foot in the last pic is standard, and if a 85hp would have had that?

Mart.

[KGS]

Originally Posted by Mart

That's interesting, never seen one like that. Can anyone tell me if that thick-ish pad on the mounting foot in the last pic is standard, and if a 85hp would have had that?

Mart.

Radiator mount pad. Goes between radiator foot and frame. Usually one per side. C%G has the kit (1165A). Yes, 85 HP uses this pad.
Ken

[flatjack9]

Kube?

[Kube]

Originally Posted by flatjack9

Kube?

What?

[flatjack9]

See post 37. I've never seen that setup