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FJR Motorcycle Forums
FAQs and Common Historical Info
Valve Checks vs. Adjustment Required Poll
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<blockquote data-quote="Fred W" data-source="post: 889321" data-attributes="member: 3828"><p>Thanks. That's what I was looking for. Also, that is an <em>unusual </em>wear pattern. Normally, what wears on a valve is the seat interface, as that is where the unlubricated friction happens. When that happens the clearances get tighter, not looser. If I found a valve whose clearance was growing I'd suspect some sort of carbon build-up might be occurring on the seat face. You might want to do a compression check on your engine and compare #3 to the others. Of course this is <em>assuming</em> that everything was properly in spec when originally assembled. At least you know what the clearances are now and can compare in another 25k miles.</p><p></p><p></p><p>Actually, this is the industry standard way to mount a valve cover gasket. It's done this way on most automotive engines that have profile type gaskets too. For one thing, it's a lot easier to fiddle with the gasket getting it seated in the groove on a work bench than it is inside the engine compartment. And, as you figured out, it's pretty easy to make it stick in place with a little goo of some type.</p></blockquote><p></p>
[QUOTE="Fred W, post: 889321, member: 3828"] Thanks. That's what I was looking for. Also, that is an [I]unusual [/I]wear pattern. Normally, what wears on a valve is the seat interface, as that is where the unlubricated friction happens. When that happens the clearances get tighter, not looser. If I found a valve whose clearance was growing I'd suspect some sort of carbon build-up might be occurring on the seat face. You might want to do a compression check on your engine and compare #3 to the others. Of course this is [I]assuming[/I] that everything was properly in spec when originally assembled. At least you know what the clearances are now and can compare in another 25k miles. Actually, this is the industry standard way to mount a valve cover gasket. It's done this way on most automotive engines that have profile type gaskets too. For one thing, it's a lot easier to fiddle with the gasket getting it seated in the groove on a work bench than it is inside the engine compartment. And, as you figured out, it's pretty easy to make it stick in place with a little goo of some type. [/QUOTE]
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FJR Motorcycle Forums
FAQs and Common Historical Info
Valve Checks vs. Adjustment Required Poll
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