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The Terminator
Engine/Tuning
Looking for opinions on piston ring gap
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<blockquote data-quote="SlowSVT" data-source="post: 15260492" data-attributes="member: 20202"><p>This sounds more like a problem with the oil rings not seating properly which is usually results of a hone that was too smooth not allowing the rings to seat. I had this problem with a big bore motorcycle jug I got from Powerall. On start-up it blew soo much oil I had to break the motor down again and ran a flex-O hone down the bore. Restarted the engine and the problem was immediately solved. The claim by Total Seal about the gargantuan leaps in cylinder sealing seem a bit overstated. Even with conventional rings the gap is very tiny and won't contribute to huge blow-by losses. Plus this is a blown engine which will see pressure as well as vacuum I don't know where they are coming from regarding the integrity of the valve stem seals. The gapless ring should be moved to the second ring in a blown engine which won't have the mechanical integrity of the heat transfer efficiency of a single ring plus it will prevent the lower rings from seeing gas pressure needed to drive the rings down onto their lands and out against the cylinder wall. </p><p></p><p>Nothing worse then having to break down a brand new engine to correct a problem. Just because a shop tell you the used a hone stone that was XXX grit doesn't mean the actual hone was equivalent of the finer grit due to clogging of the abrasive. That is where your problem likely originated from.</p></blockquote><p></p>
[QUOTE="SlowSVT, post: 15260492, member: 20202"] This sounds more like a problem with the oil rings not seating properly which is usually results of a hone that was too smooth not allowing the rings to seat. I had this problem with a big bore motorcycle jug I got from Powerall. On start-up it blew soo much oil I had to break the motor down again and ran a flex-O hone down the bore. Restarted the engine and the problem was immediately solved. The claim by Total Seal about the gargantuan leaps in cylinder sealing seem a bit overstated. Even with conventional rings the gap is very tiny and won't contribute to huge blow-by losses. Plus this is a blown engine which will see pressure as well as vacuum I don't know where they are coming from regarding the integrity of the valve stem seals. The gapless ring should be moved to the second ring in a blown engine which won't have the mechanical integrity of the heat transfer efficiency of a single ring plus it will prevent the lower rings from seeing gas pressure needed to drive the rings down onto their lands and out against the cylinder wall. Nothing worse then having to break down a brand new engine to correct a problem. Just because a shop tell you the used a hone stone that was XXX grit doesn't mean the actual hone was equivalent of the finer grit due to clogging of the abrasive. That is where your problem likely originated from. [/QUOTE]
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Looking for opinions on piston ring gap
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