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SportTrac Discussion
Engine & Drivetrain
4.6 3 valve rotation
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<blockquote data-quote="scott degroot" data-source="post: 852309" data-attributes="member: 66039"><p>Valves must rotate or else the valve face to valve seat contact area over time will become all messed up. The purpose of valve rotation is to keep the seat/face area clean of any deposits adn also to help keep the area true. Valve rotation also aides in preventing valve sticking. Years ago special valve rotators, like the one pictured above, were used to aide in this process but with newer valve designs it has been discovered that the valves just have a natural tendency to rotate adn they don't do so in any specific direction and they only do so in very small amounts</p></blockquote><p></p>
[QUOTE="scott degroot, post: 852309, member: 66039"] Valves must rotate or else the valve face to valve seat contact area over time will become all messed up. The purpose of valve rotation is to keep the seat/face area clean of any deposits adn also to help keep the area true. Valve rotation also aides in preventing valve sticking. Years ago special valve rotators, like the one pictured above, were used to aide in this process but with newer valve designs it has been discovered that the valves just have a natural tendency to rotate adn they don't do so in any specific direction and they only do so in very small amounts [/QUOTE]
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SportTrac Discussion
Engine & Drivetrain
4.6 3 valve rotation
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