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Message: <blockquote data-quote="kilohertz" data-source="post: 82206" data-attributes="member: 6974">Update...I pulled the manifold and tappet covers and used my little video scope snake thing to look into the cylinder and the problem cyl. #2 looks nice a clean, no carbon, and the plug is the cleanest of them all. It looks like the cylinder is running fine, just no compression. I checked the valve clearance and found them to be tight again, almost no clearance, way less than .008" on both, so I adjusted them to spec and immediately went back to 40psi and then compared to the other cyclinders and they are all the same again...put some oil in each cylinder and they all climbed to 60 +/- 10 psi which is where I was 3 years ago. So, what the heck happened? Do valves just tighten up by themselves or is this just normal wear of the valve seat? It has 160 hours on it in the 3 years since I had the original problem. Maybe there was some carbon stuck under the valve that finally cleaned up.So today's project is to adjust #1 and #3 cylinders and put it pack together and see what I have when it warms up. As you can see, I am dealing with a little snow and have my patio umbrella setup so I can work on it. I tried to loosen the head bolts with my electric impact gun but decided against further removal attempts...I need the machine and don't want to get into removing borken bolts from the block and the mess that goes with that.One other thing I noted, the problem cylinder seems to have a weak exhaust valve spring, in that I can actually pull it off the tappet with some effort with my fingers..have nothing to compare it until I get  the other covers off, but is this a problem or normal? It seems weaker than the intake spring. It's not broken.I'll keep you posted.Thanks!<img src="http://www3.telus.net/radioboy/DSCN4996.JPG" alt="" class="fr-fic fr-dii fr-draggable " style="" /></blockquote>

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