I've got an 1 1/8" Cane Creek headset on a mountain bike that has been switched over several times to other frames over the past 10 years or so. I just used it on a parts bin bike I put together and it keeps coming loose after each ride. I have to loosen the bolts on the stem, then really crank down on the cap bolt that goes into the star nut, then tighten the stem again. The result is the steering feels tight. Is there something to look for or have I finally just installed/removed too many times?

Thanks