I have a 1988 Mazda b2200. 144k miles before rebuild. I've rebuilt the engine not long ago, and sent the head to a machine shop to be repaired and put in new HLA's. The head had some HLA noise, and I wanted that fixed. To my suprise after starting the engine, the head had worse HLA noise than before. I gave it the recommended time for the HLA's to pump up, but still ticking. I decided to take apart the head myself and see what was going on. I found that the rocker arms and shafts had tons of wear, but all new springs, locking nuts, valve stem seals etc. I replaced all rocker arms which came with new HLA's and new rocker arm shafts, and a new cam. Started it up went through all the break-in period with the cam and to pump the HLA's, and it is still ticking. The ticking just wont go away. The ticking is occuring more on the exhaust side than the intake side. The engine has incredible compression, 50-52 PSI of oil pressure on cold start and at 3,000 RPM, Its not running sluggish at all. What am I missing thats causing this ticking in the head?