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Does this make any sense Bob?
Engine Builder Magazine with Engine Pro.
Shop Solutions: The Four-Way Slide
We often times trust our senses. I trust my sense of touch in what I call, The Four-Way Slide. The bounce test works, but this concentricity test tells you more. I slide the valve against the seat to the back, right, left, and back towards me. If the feel and movement is the same, the seat is very concentric to the valve guide. I manipulate the valve stem at the spring side with my other fingers and with practice it’s second nature.
I always check each one when I’m cutting the seats. If it isn’t good, I influence the spindle on the Serdi or VGS20 toward the side with the biggest slide while floating to the center the spindle. If it starts cutting on what you found was the high side of the slide, it’ll be better.
Randy Torvinen, Torvinen’s Machine in Menahga, MN
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Engine Builder and Engine Pro present Shop Solutions to provide machine shop owners and engine technicians the opportunity to share their knowledge to benefit the entire industry and their own shops. Those who submit Shop Solutions that are published are awarded a prepaid $100 Visa gift card.
Submit your Shop Solution at shopsolutions@enginebuildermag.com. You must include your name, shop name, shop address, and shop telephone number. Submitted Shop Solutions not published will be kept on file and reevaluated for each month’s new entries.
Does this make any sense Bob?
Engine Builder Magazine with Engine Pro.
Shop Solutions: The Four-Way Slide
We often times trust our senses. I trust my sense of touch in what I call, The Four-Way Slide. The bounce test works, but this concentricity test tells you more. I slide the valve against the seat to the back, right, left, and back towards me. If the feel and movement is the same, the seat is very concentric to the valve guide. I manipulate the valve stem at the spring side with my other fingers and with practice it’s second nature.
I always check each one when I’m cutting the seats. If it isn’t good, I influence the spindle on the Serdi or VGS20 toward the side with the biggest slide while floating to the center the spindle. If it starts cutting on what you found was the high side of the slide, it’ll be better.
Randy Torvinen, Torvinen’s Machine in Menahga, MN
—
Engine Builder and Engine Pro present Shop Solutions to provide machine shop owners and engine technicians the opportunity to share their knowledge to benefit the entire industry and their own shops. Those who submit Shop Solutions that are published are awarded a prepaid $100 Visa gift card.
Submit your Shop Solution at shopsolutions@enginebuildermag.com. You must include your name, shop name, shop address, and shop telephone number. Submitted Shop Solutions not published will be kept on file and reevaluated for each month’s new entries.
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