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Valve setting
I have a 66 bug with a 1776 cc engine. I know it has some sort of reground
cam, bigger jugs and pistons and headers. What I don't know is what gap to set my valves at. Any suggestions? Thanks, Mike |
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#2
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Valve setting
"Mike West" > wrote in message ... >I have a 66 bug with a 1776 cc engine. I know it has some sort of reground > cam, bigger jugs and pistons and headers. What I don't know is what gap to > set my valves at. Any suggestions? > Thanks, Mike > > if you have alluminum pushrods stick to the stock 0.06....if you have steel/chromoly pushrods(common in "highperformance" engines) i adjust mine to a "loose zero"...that is, remove all the lash, but loose enough to still spin the pushrod with your fingers.... |
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Valve setting
Mike West wrote:
> I have a 66 bug with a 1776 cc engine. I know it has some sort of reground > cam, bigger jugs and pistons and headers. What I don't know is what gap to > set my valves at. Any suggestions? > Thanks, Mike Depends on what material your pushrods are. Stock pushrods are aluminum, and they make the valve clearance shrink when the engine is warmed up. So if you have stock aluminum pushrods, adjust the valve gap to 0.15mm (.006") when the engine is COLD. It will be tighter when the engine has warmed up. However, high performance engines often make the alu sticks bend, and the builder therefore replaces them with steel pushrods. Steel doesn't expand as much as aluminum when heated, so they fall short when the engine warms up.. and the clearance then grows. So if you have steel rods, adjust them as close to ZERO gap as possible (Engine COLD), but make sure they still spin freely when the valve is closed at TDC. If you want to play safe, adjust them to the minimum gap you can feel or measure. The gap will still grow much beyond .006, and they usually are noisy.. but it'll work. jan |
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