The Ford Barn

LJ48 · 05-22-2026, 10:56 AM

On my 1950 Club Coupe with a 296" Flathead V8, the radiator cap is a very old lever type cap. I want to replace it with a 4# regular cap, but the filler neck is 3/4' deep instead of 1" which I understand is normal. The only I.D. I can find on the radiator is Jake's Radiators. It is a brass radiator. The caps that I can find are for the deeper filler neck so they won't close. I want to stick with the low pressure cap since I have the original heater. I have read many posts on the site, but mostly they discuss low vs high pressure caps, not the depth difference. Has anyone else found a solution for this?
Thank you,
Larry

Drbrown · 05-23-2026, 09:31 AM

I don't know about a '50 ford but a 4 lb cap is stock for '47-'48 and I think they went to an 8 lb later.

Bob C · 05-23-2026, 12:07 PM

Try a Stant 10208 says fits a 3/4" deep neck. 1953-64 Ford tractor or 1952-56 Ford pickup with OHV engine.

LJ48 · 05-23-2026, 01:01 PM

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Thank you guys. I double checked, and the factory service manual says the manual trans V8s were pressurized systems to 3 1/2 to 4 1/2 pounds. That Stant number crosses to a MotoRad T4 which I have found.

05-22-2026, 10:56 AM	#1
LJ48 Junior Member Join Date: May 2026 Posts: 2	radiator cap replacement On my 1950 Club Coupe with a 296" Flathead V8, the radiator cap is a very old lever type cap. I want to replace it with a 4# regular cap, but the filler neck is 3/4' deep instead of 1" which I understand is normal. The only I.D. I can find on the radiator is Jake's Radiators. It is a brass radiator. The caps that I can find are for the deeper filler neck so they won't close. I want to stick with the low pressure cap since I have the original heater. I have read many posts on the site, but mostly they discuss low vs high pressure caps, not the depth difference. Has anyone else found a solution for this? Thank you, Larry

05-23-2026, 09:31 AM	#2
Drbrown Senior Member Join Date: Oct 2013 Location: Glens Falls NY Posts: 1,403	Re: radiator cap replacement I don't know about a '50 ford but a 4 lb cap is stock for '47-'48 and I think they went to an 8 lb later.

05-23-2026, 12:07 PM	#3
Bob C Senior Member Join Date: May 2010 Location: So Cal Posts: 9,598	Re: radiator cap replacement Try a Stant 10208 says fits a 3/4" deep neck. 1953-64 Ford tractor or 1952-56 Ford pickup with OHV engine.

05-23-2026, 01:01 PM	#4
LJ48 Junior Member Join Date: May 2026 Posts: 2	Re: radiator cap replacement Sponsored Links (Register now to hide all advertisements) Thank you guys. I double checked, and the factory service manual says the manual trans V8s were pressurized systems to 3 1/2 to 4 1/2 pounds. That Stant number crosses to a MotoRad T4 which I have found.