Has anyone done the 910 springmod? Am getting ready to orde the parts and i wasu wondering the best why to Change the spring,what shims you used ,did you put new seats in,and did you put new keeper in too?
They can be done with the engine in but I'd hate to know I had to do it that way. I have swamps valve spring tool and micrometer. I didn't worry with seals or retainers. Be sure to pick up some shims so you can install them at the proper height for desired seat pressure.
No air, just tdc. The micrometer measures installed height. Your installed height determines your seat pressure. For 125 psi of seat pressure you need an stalled height of 1.78 inches. That's what the shims are for.
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