Join Date: Aug 1998
Location: Waldorf Md. USA
Before you go any further, I think you need to have someone "show" you how to adjust the valves. I have come to the realization that valve adjustment has got to be one of the most difficult things to describe to someone in writing, or even over the phone. Those of us that do it for a living can do it with our eyes closed, but there is a "feel" for it that almost has to be taught in person. You are about an hour north of Matoon if my map is correct. Call Ian at Matoon Machine / Engine Works. His number is (217)258-8383. He used to work for me until he moved out to Matoon. He is a very easy going guy and knows engines very well. I am certain if you asked him, he would show you how to adjust the valves. I am sure he probably has an engine there at the shop to use. If he refuses (he wont )....tell him Mr Bill said he better do it !!
It sort of sounds like you have a bad set of lifters, or perhaps the fast bleed ones got stuck in the box by mistake. Did you assemble the motor ?? If so do you remember the lifter part number ? It should be on the lifter if it is a real Comp Cams lifter. The fast bleed lifters will collapse like you are describing when they lose oil pressure.
The other thing you need to do is to get a second opinion on the "noise" What is noisy to you may be perfectly normal for a performance motor, even though that particular cam should not be. Are you running roller tip, or full roller rockers ? I know from experience that the Comp Roller Tip rockers make a slight amount of noise.
Three thousanths clearance is a bit more than I normally like to run, but you have plenty of oil pressure so that should not be a problem.
Without actually being there, we are all guessing as to the problem. I really think you need to find someone local to take a look / listen.
Hope this helps,
Advanced Automotive Machine
1971 Heavy Chevy - original owner
Team Chevelle #100