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Discussion Starter #1
Since I'm changing valve springs and rockers in my ZZ4, I want to change the valve seals while I'm there. What do you guys recommend?
 

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Discussion Starter #3
Next question: any body know the valve guide size on an L98 aluminum ZZ4 head? Summit shows .62, .674 and .71
 

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Sounds like somebody needs to pull a spring and use a caliper and find out for sure what will fit.

You need to know the guide size as well as the valve stem size (because some of the later stuff is coming with 7mm stems) and valve spring I.D. to make sure there's no interference issues to deal with.

Then you'll KNOW for sure what will fit.:yes:
 
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