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General Minitrail Talk
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71K0 just brought out of a LOOONNGG storage.
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<blockquote data-quote="69ST" data-source="post: 175100" data-attributes="member: 5"><p>All good signs, especially the compression and overall performance, imho. </p><p></p><p>The one area where I'll never agree, blindly lapping a valve. Don't get me wrong, it is <em>possible</em> to get a good result but, an <em>optimal</em> result is unlikely. It's mainly a question of longevity and sealing power, under pressure, neither of which will have anything to do with valvetrain clatter. If anything, you'd see increased rate(s) of valve recession, lash would get smaller and, it'd take fewer miles before reversion (intake side) returns. Occasionally, I'll end up just lapping the valves, or installing new valves and only lapping them. Sometimes, a head will be in amazingly good condition, as-received; that doesn't happen often. I verify seat condition and contact band(s) first, never leaving this to chance. If this was done with the head in question, then it's one more item you can cross off your list...one less thing to obsess over...<img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite2" alt=";)" title="Wink ;)" loading="lazy" data-shortname=";)" /></p></blockquote><p></p>
[QUOTE="69ST, post: 175100, member: 5"] All good signs, especially the compression and overall performance, imho. The one area where I'll never agree, blindly lapping a valve. Don't get me wrong, it is [I]possible[/I] to get a good result but, an [I]optimal[/I] result is unlikely. It's mainly a question of longevity and sealing power, under pressure, neither of which will have anything to do with valvetrain clatter. If anything, you'd see increased rate(s) of valve recession, lash would get smaller and, it'd take fewer miles before reversion (intake side) returns. Occasionally, I'll end up just lapping the valves, or installing new valves and only lapping them. Sometimes, a head will be in amazingly good condition, as-received; that doesn't happen often. I verify seat condition and contact band(s) first, never leaving this to chance. If this was done with the head in question, then it's one more item you can cross off your list...one less thing to obsess over...;) [/QUOTE]
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General Minitrail Talk
Projects/Builds
71K0 just brought out of a LOOONNGG storage.
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