Abstract: The present invention is to a protective valve cap and a valve cap assembly. The protective valve cap secures and protects a valve and a valve cap during shipping and manufacturing of the assembly of parts comprising the valve and a valve cap assembly. The protective valve cap has a first end comprising a cylinder having a diameter and a length to fit inside and substantially secure the valve cap, a second end comprising an open cylinder having a diameter and a length to fit over and substantially secure an end of a valve that engages the valve cap, and an interferant structure, preferably a solid wall structure, integrally formed with and disposed between the ends and having a diameter larger than the ends.