The intake valve seal should be the positive seal that pushes
right down over the valve guide. The exhaust seal uses the
umbrella type that just rides on the valve stem. Make sure
you use the small plastic sleeve to protect the seals as you
push them down the stem. And "YES" you must use the
o-rings under the keepers. And you must install the
valve spring and retainer, compress them, and "then" install
the o-ring right before you install the keepers. If you install
the o-ring on the valve stem and then compress the spring,
(as so many rookies do), you will push the o-ring below
the spring retainer and it will not work properly.
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