I hate when that happens. The brand new radiator came with a brand new POS rubber cap for the throttle return nipple which has cracked enough to leak my MotorCraft coolant out, to the point that what's left is boiling. I barely noticed it after leaving the truck idling for a while. Fortunately, I expected it, and I have a JY replacement cap stored on the tip of a bolt nearby, so it only took a few minutes to fix.
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![16728boil4.jpg I hate when that happens. The brand new radiator came with a brand new POS rubber cap for the throttle return nipple which has cracked enough to leak my MotorCraft coolant out, to the point that what's left is boiling. I barely noticed it after leaving the truck idling for a while. Fortunately, I expected it, and I have a JY replacement cap stored on the tip of a bolt nearby, so it only took a few minutes to fix.
[url=https://www.supermotors.net/registry/media/895145][img]https://www.supermotors.net/getfile/895145/thumbnail/radiatorexploded.jpg[/img][/url] . [url=https://www.supermotors.net/registry/media/1074225][img]https://www.supermotors.net/getfile/1074225/thumbnail/08hxs3.jpg[/img][/url]](https://www.supermotors.net/getfile/1093569/fullsize/16728boil4.jpg)