Building Chevy 4.3 liter V6 - 1994 with balance shaft
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Machine the valve spring pockets and the valve guide bosses for clearance to accomodate the new lift and oil seals. | Machine the valve spring pockets and the valve guide bosses for clearance to accomodate the new lift and oil seals. | ||
| + | ''' PISTONS - ZERO DECK ''' | ||
| + | It turns out to be a problem and to solve this I will have to do a complete test-assembly including camshaft and rockers with valves. JE Pistons states that 1.585 CD (compression distance/height) pistons are a "zero deck" application while this is not entirely true. As my block is 9.025" deck height and I do not intend to machine .050" off that block I will have to go with custom pistons at a 1.600" CD. As I'm getting really close to the head now and using just the gasket to form the squish distance of some 0.030" - 0.040" (0.85 - 0.95 mm) in order to get good results, I will assemble it with the heads and valves and at the same time determine clearances. The pistons will need valve pockets to accommodate the greater valve lift. | ||
Next will be a test assembly to figure the correct dimensions for valves, beehive springs, retainers (maybe titanium), locks and finally the pushrods once I have the geometry defined. | Next will be a test assembly to figure the correct dimensions for valves, beehive springs, retainers (maybe titanium), locks and finally the pushrods once I have the geometry defined. | ||
Let's continue the build. | Let's continue the build. | ||
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