When do weak valve springs cause a problem?
When do weak valve springs cause a problem? If weak valve springs are causing your problem; the vacuum readings on the gauge will oscillate as engine speed increases. However, a rapid vibration or variation in the vacuum gauge reading at increased engine speed; can also be caused by: What is the pressure of the valve springs? Valve Springs The valve springs also push back against all the other parts like the rocker arm; pushrod and lifter to maintain pressure on the cam lobe. In most stock engines; the pressure exerted by the valve springs when the valves are closed, is...