Mechanics+-+How+to+do+a+Valve+Grind

= The Big Three =

Worn and carbon covered valves prevent valves from sealing properly.

 * ====[[image:P1320504.JPG]].====

paste and some lubricating oil...
|| A valve lapping tool || Some grinding paste || ======== Engine lubricating oil ||  ||

Here's what we did...
====First we removed the cylinder head from the engine so the valves, guides and seats could be checked for wear. If valves are worn and pitted, they can be resurfaced by grinding them to make perfect seals.====

The photos below show Kody and Josh doing a valve grind. Photos of some of the details are missing but hopefully the procedure will still be clear...

 * [[image:P1320490.JPG]]

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beneath the intake valve stem.
|| Pointing to the exhaust outlet. Exhaust valves run much hotter than intake valves and are more likely to be damaged and covered in carbon. || Using a cloth to clean the valves and ports, ready for inspection for damage The springs and spring retainers have already been removed. The grinding paste is ready on the right... ||
 * [[image:P1320498.JPG align="center"]]

You can see a spring retainer next to the valve.
|| When the edge of the valve is ground smooth it should look like this - a nice matte finish with no lines or pits in it. ||
 * [[image:P1320502.JPG]]

Both the seat and the valve should be ground perfectly smooth.
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Less friction means less wear and tear.
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will be uneven and cause it to leak pressure and oil
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 * [[image:P1320514.JPG]]

geometry and guide wear.
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Reassembled and ready to test...
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Hooray! It started first time!
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