KRAIG - I bet CHARLIE had a HARD FROST this AM. Meaning it froze the ground a couple inches down!
JEREMIAH, DAVID C. - SON had a class in college where they studied metal forming. The Prof. claimed he had actually written most of the info in the Machinist's Handbook on metal forming. I was buying steel stampings at my job back then, as I had at several other prior jobs, and had discussed "Spring-Back" with SON, which was the tendency of steel stampings to not bend as completely towards the ends of the part as they do in the center of the part because the steel "Springs Back" towards the edges of the part because it isn't supported by metal on either side of the bend. The Prof had NEVER heard of that term or of that problem before. He wanted to argue with SON during the lecture. SON said, "Don't Argue with me, Argue with my Dad, he buys a couple Million Dollars worth of steel stampings a year and he fights this problem daily". I had a whole family of 14 ga. 304 stampings that had a short 3/16ths inch lip formed on the edges that you could plainly see the metal "Springing back" close to 1/16th inch along a 14-15 inch edge. Right then and there I knew I wasn't getting my Money's worth from my $100,000+ investment of tuition. That prof also hadn't heard of "Friction Welding", and three doors down and across the street from our plant was a little company called, AMEICAN FRICTION WELDING, that had trucks from companies like Dana Corp, CAT, Ingersoll-Rand, Dresser, Navistar, etc. etc. etc parked at their dock Every day. I wonder what ROCK the Premier engineering school in the Nation found that tenured prof under years ago. Evidently the Prof was too interested in revising his text books by adding a comma or semicolon in his Forward so all incoming students had to buy his latest revision of HIS $150+ text book instead of buying or borrowing a used older revision text book that he hadn't kept up with current technology of the last 20-30 years.
ANYHOW... "COMMERCIAL Tolerances" require that you allow .030" tolerance on ANY dimension over a bend to allow for variations of metal thickness and temper, which effects setback, bend allowance, & spring back because of the way the thickness impacts the metal forming in the dies. Tighter tolerances normally can be held, but unless specified and agreed upon by the supplier, can not be a grounds for rejection. And possibly tooling and part design changes may be required to make the part to print repeatably. Ohhh and our print title block tolerances on angles was +/- TWO degrees IIRC.
So I wouldn't be too concerned with dimensions over bends and sheared edges being within 1/32nd of an inch.
MIKE P. - In addition to what Brian said about your carb set too rich, clean any hard carbon deposits off the valve stems, especially the exh. valve which will make the exh. valve stick open when the engine gets warm.
And once you have the head & block mating surfaces all cleaned up, set the head back on the block and slide the thinnest feeler gauge strip you have, typically .0015" thk between the head & block and press lightly on the head and try to pull the feeler gauge out. The head must hold the feeler gauge tightly or the head or block is warped, most times the head will warp, but sometimes the block can too.
Sounds like your carb could use a rebuild, disassebmle and soak it in carb cleaner for a day and blow out ALL the passages good with spray carb cleaner & compressed air, then install a new main fuel valve, float pin, and gaskets, the typical Carter carb rebuild kit. The main thing is to get ALL the fuel & air passages clean.
