Rdiator caps

GPA · Post by **GPA** » Fri Feb 20, 2009 1:51 am

I've got two rad caps, need help to decide wich type to use. Opening pressure 4psi on both. Pictures will be uploaded later with Ryan's help(hopefully).

Post by **Ryan_Miller** » Tue Feb 24, 2009 3:58 pm

Zoli,

I will get it up tonight, it is on my home computer.

Uncle Sam (Army) has been keeping me busy the last few days.

GPA · Post by **GPA** » Wed Feb 25, 2009 2:50 am

Ryan,
You have to serve your country and we should not forget, that Sam was the one who had created our Jeep.
Zoli

Post by **Ryan_Miller** » Wed Feb 25, 2009 8:29 pm

These appear to be replacement style caps.

Originals were Eaton caps.

I think you wanted to know which would be best to use, which others here would know more than I.

Post by **wesk** » Wed Feb 25, 2009 10:16 pm

Are there any manufacturer's markings on the caps?

As long as the pressure rating is correct and the cap matches the filler neck OD and the filler neck inner depth it will be ok to use it.

For the jeeps that should be 2 1/16" OD neck with a depth of 3/4" (this measurement insures the inner lower disc of the cap seals with adequate force against the ridge dow inside the filler neck.

GPA · Post by **GPA** » Thu Feb 26, 2009 9:41 am

No manufacturer's name appear on either caps. The one on the right side (on paper bag) does not have a rubber seal and the release valve is inside the rigid center housing. Dimensions are about the same, both will fit the rad neck, but the one without the rubber seal is much tighter. I have two M38A1s here right now and both have radiator cap with the rubber seal. But this does not mean that the cap is right.
Zoli