I want to check the valve adjustment on my 2003 Civic Hybrid. I have 65,000 miles on it, and I have what sounds like valve lash noise on cold startup for a few minutes. In looking at the shop manual, there is a Honda Air Pressure Regulator, 07AAJ-PNAA100 that is used to pressurize the vtec. It looks like just a 0-100psi regulator and a hose. I have a compressor, but I don't know what fitting is required where it would connect to the block at "inspection hole B" on the head. What fitting is that? In looking at valve adjustment procedures on "temple of vtec", I don't see any air pressure device mentioned. Is the air pressure needed to adjust the valves, or is that only a check to see if the vtec is working? The manual isn't written too clearly in this area. The first mention of air pressure seems to be to check that you have already applied it before the previous steps ;-) It looks like 0-28psi should allow the rocker arms to be independent. 28-57psi is where they should become linked, and over 57psi should be linked. Is that right?