Posted by Mark - IN. on February 23, 2008 at 07:29:50 from (205.188.117.74):
In Reply to: Gasket fire rings? posted by 37 chif on February 22, 2008 at 20:43:24:
O-ringing the deck surfaces between the block and heads give a better clamping affect because the grooves cut to hold the O-ring in place in higher compression applications, such as turbo charging. There was a guy whose name I won't mention during the late '70's whom I suggested that to going into the Indy time trials, before the Indy time trials. He was one of the first to run a "stock block" as they referred to his small block chevy, even saying it was out of a school bus, which it really wasn't. There were some conditions that sent up a red flag to O-ring the cylinders. When it came time for the time trials he did ok for the first couple of laps...and a head gasket let go, and he/they didn't qualify. In the garage area afterwards I walked over and asked, "Did you O-ring the cylinders", which I suspected they had not. He/they were pretty mad and we'll let that just go at that, other than to say they had not. It was a fairly new or little known or thought of technology at the time and still, O-ringing the cylinders is a good idea when dealing with higher compressions at least. Who knows, these days with technologies being what they are, they may just use some space age stuff out of an spray can that does they same for much cheaper. I doubt it, but give kids a computer loaded with cad and they'll design a space shuttle out of plastic and paper, and it'll probably blast off and fly.
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Today's Featured Article - The Nuts and Bolts of Fasteners - Part 2 - by Curtis Von Fange. In our previous article we discussed capscrews, bolts, and nuts along with their relative hardness and thread sizes. In this segment we will finish up on our fasteners and then work with ways to keep them from loosening up in the field. Capscrews, bolts and nuts are not the only means of holding two parts together. When dealing with thinner metals like sheet tin, a long bolt and
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