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I have a 1954 M38A1 with a side mounted radiator, F-134-4 engine. What 4 lb psi cap do I need? Thanks.
Willys Jeep Parts Tech:
No it will not, they are for bottom mount only.
No it will not, they are for bottom mount only.
What is ment by bottom mount? I have a 52 m38a1 with the hinged front clip. The radiator appears to be original and mounts via a flange on ither side to the nose. Would this be an example of a non bottom mount? Or should I just measure the neck size and be ok? Thanks
Willys Jeep Parts Tech:
Bottom mount is referring to a radiator that has 2 studs on the bottom of it to mount on steel tabs on the crossmember its bolted to. A side mount radiator is where the radiator is actually bolted to the grille.
Bottom mount is referring to a radiator that has 2 studs on the bottom of it to mount on steel tabs on the crossmember its bolted to. A side mount radiator is where the radiator is actually bolted to the grille.
Hello. I bought an after market radiator for my 46 Willys CJ2A and it came with a 13lb. cap. Should I get a 4lb cap or will the 13lb one be ok??? Have driven it several times and it is working fine.
Willys Jeep Parts Tech:
We have not hand any issues with the supplied caps by the manufacturer.
We have not hand any issues with the supplied caps by the manufacturer.
is this a 21/8" inside diameter cap?
Willys Jeep Parts Tech:
2-3/4" inside diameter of the metal cap itself.
2-3/4" inside diameter of the metal cap itself.
I have a '48 CJ-2A with a bottom mounted radiator. I've had trouble getting a replacement radiator cap. The inter-neck is 1-1/2" across, the outer-neck is 2" across and the depth is 1" from the bottom of the screw on cap, is the item #810391 the correct cap?
Willys Jeep Parts Tech:
If you are bottom mount yes this should be it. Make sure it looks the same as yours from the photos.
If you are bottom mount yes this should be it. Make sure it looks the same as yours from the photos.
i have a 1958 CJ5 Willis Jeep. is this the correct cap? also, I don't understand the bottom mount and side mount stated for the radiator. what does this mean? thanks.
Willys Tech:
It is referring to how the radiator mounts. Either bottom mounted to tabs on the crossmember or side mounted to the grille.
It is referring to how the radiator mounts. Either bottom mounted to tabs on the crossmember or side mounted to the grille.
I have a 1953 M38A1. What exactly do I measure to find out which cap I need? Also, I have seen 7lb and 4lb caps sold as NOS. How do I know which is proper? Which is standard for your M38A1 replacement radiator (805825)? Thank you.
Willys Tech:
We typically use a 4lb cap for the 4-134 engines. You just need to measure your neck size to confirm yours.
We typically use a 4lb cap for the 4-134 engines. You just need to measure your neck size to confirm yours.
I have a '52 M38, the part number in the book specifies #7375030, but I'm not finding it anywhere. Will this fit?
Willys Tech:
Yes as long as you have the large neck measurement above. Which you should.
Yes as long as you have the large neck measurement above. Which you should.
I have a 1950 Sedan Delivery with what I think is the original radiator. It looks like the radiator cap doesnt seat correctly. It looks like the depth of the radiator neck is 1 deep where as the rubber seals on the cap only measure 3/4. So when the motor heats up, the cap doesnt seal and it just goes out the overflow hose. I checked other aftermarket caps and they also measure 3/4. Does this sound correct or am I just missing something?
Willys Tech:
Sounds like you need part number: 648746 if you have the small style. This part number is for the 2-7/8 neck.
Sounds like you need part number: 648746 if you have the small style. This part number is for the 2-7/8 neck.
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