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The excessive play in the exhaust valve means that the guide will need to be replaced. The exhaust guides on these engines usually wear out long before the intake guides do!
As for installing the seals:
if you look inside the stem seal (from the top or smaller opening) you will see there is a small (1/16" or so) shoulder of seal material. The best way to install the seal is to lightly lube it (I use 2 stroke oil). and slowly tap it into place. This is alot easier to do on a rebuild fixture so you know it is going on straight! Tap it a few times, then check the clearance from the shoulder of the seal to the top of the guide, repeating until the shoulder just comes to rest on the guide but doesn't deform.
Also, if the guides are to be reused, make sure ALL of the old seal material is removed from the exposed guide! This is easily done with scotchbrite. If there is old seal material there, it will grab the new seal and not allow it to seat properly.
Hope it helps!
-Nick
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Owner: Bennington Motorsports www.benms.com
Sponsor for Midwest Region 944-SPEC racing series
-When was your timing belt changed or tensioned??
-Yes, I'm the crazy man that will loan out my 9201. Just PM me, I will add you to the list and get it out ASAP.
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