Related Photo Galleries
On the left is a standard valvespring. On the right is a valvespring that has gone through a surface treatment process to polish it. The spring isn’t coated, but the polishing process smoothes the surface to reduce or eliminate any imperfections that can create an originating point for a crack to develop and cause a spring failure. Also notice how the edges of the spring on the right at the very top where it contacts the spring retainer have been chamfered to eliminate any sharp edges.