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Good evening everyone. I’m in need of some help locating a radiator cap. I have a 2003 with the caterpillar C12. The radiator cap that goes on the fill tank has gone bad and I’m not having any luck replacing it. Newell didn’t have much to offer the first time I called them. I was going to try them again next week if this post is unsuccessful. I have included pictures of my current cap with dimensions. Does anyone have a part number or a suggestion of a place to try?