wow! my valve broke
#53
9 Second Truck Club
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Sounds, and looks like a faulty valve, but I wouldn't totally rule out the fact valve float could have caused it to fracture. The valve doesn't have to hit the piston to be designed by valve float. Running too week of spring with a cam more aggressive than the spring was designed for will allow the valve to bounce on the seat. That action simulates an air chizzle on the valve.
#55
PT's Slowest Truck
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Sounds, and looks like a faulty valve, but I wouldn't totally rule out the fact valve float could have caused it to fracture. The valve doesn't have to hit the piston to be designed by valve float. Running too week of spring with a cam more aggressive than the spring was designed for will allow the valve to bounce on the seat. That action simulates an air chizzle on the valve.
#56
TECH Senior Member
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Well actually, the cam lobe sets the valve on the seat. Too weak of a spring that can't keep up with the lobe will float(stay open), and when the spring catches up there is no sloping lobe to set it back on the seat, it slams on the seat and causes breakage.
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