A Matter Of Timing
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We installed new Crane matching valvesprings after checking the installed height to ensure that there would be no coil bind or retainer-to-seal clearance problems. Basically, if the valvetrain generates 0.450 inch of total valve lift, then the installed height should accommodate at least 0.500 inch of total lift before coil bind. There should also be at least a 0.050-inch clearance between the bottom of the retainer and the top of the seal at max valve lift. This will prevent seal damage. Note the use of positive valve seals on this engine. View Related Article
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