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Valve spring tension is set by engine manafacturers at a rate that will eliminate valve bounce within the operating rev range of the engine. The spring rate in standard factory engines is set to a level that satisfies the valve bounce and seating requirements yet will not overload the valve train causing premature wear.
The correct seat pressure exerted by the spring allows the correct transfer of heat from the valve to the engine coolant. The valve spring tension at closed length and open length must be within specifications.
The correct seat pressure exerted by the spring allows the correct transfer of heat from the valve to the engine coolant. The valve spring tension at closed length and open length must be within specifications.
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