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General Minitrail Talk
Tech Area
HK0 head and cylinder options.
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<blockquote data-quote="69ST" data-source="post: 185658" data-attributes="member: 5"><p>That's a really good photo in #11. Pat is on-the-money. While it's uncommon to find a cylinder that's tapered enough to require more than one O/S beyond its current diameter, rust pitting is a whole other thing. Rust pitting usually requires going out 2 O/S, sometimes 3, to reach clean, uniformly, solid metal. The only other surprise is how many of these engines have already been overbored at least once, as-received. </p><p></p><p>None of this is a big deal, really. There's plenty of material thickness. But...this illustrates why it's best to check a cylinder before ordering a new piston/rings.</p></blockquote><p></p>
[QUOTE="69ST, post: 185658, member: 5"] That's a really good photo in #11. Pat is on-the-money. While it's uncommon to find a cylinder that's tapered enough to require more than one O/S beyond its current diameter, rust pitting is a whole other thing. Rust pitting usually requires going out 2 O/S, sometimes 3, to reach clean, uniformly, solid metal. The only other surprise is how many of these engines have already been overbored at least once, as-received. None of this is a big deal, really. There's plenty of material thickness. But...this illustrates why it's best to check a cylinder before ordering a new piston/rings. [/QUOTE]
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HK0 head and cylinder options.
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