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The Terminator
Engine/Tuning
Looking for opinions on piston ring gap
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<blockquote data-quote="MalcolmV8" data-source="post: 15330497" data-attributes="member: 8854"><p>Thought I'd post an update for others researching the topic. I tore my motor down to a bare block, had it honed and put conventional piston rings in. Put the car all back together. My brand new exhaust system was coated in a black nasty soot from all the oil burning. I installed new mufflers this time around (for sound) but it gave me new piece of exhaust to keep an eye on.</p><p></p><p> I re-installed the same black sooty O2 sensors as there's no point in ruining the brand new set if that didn't fix the issue. Put a few hundred miles on the new setup and pulled the mufflers to check. Nice light grey inside of them. No black soot. Pulled plugs and they're staying clean and look a million times better than the plugs that were in the oil burner setup. I also pulled an O2 sensor and it actually burned all that nasty black soot off of it and it's a nice light grey color. This is great news. </p><p></p><p>So for me personally ditching those gapless rings and going back to conventional cured that horrible oil consumption issue. Of course now I no longer have that perfect sealing top ring so I get blow by and a bit of an oily mess out the valve covers, especially the passenger's side, so I'll need to install some catch cans. I'll gladly take that over burning a quart of oil every 200 ~ 250 miles. </p><p></p><p>Based on my experience I couldn't recommend gapless rings to anyone.</p></blockquote><p></p>
[QUOTE="MalcolmV8, post: 15330497, member: 8854"] Thought I'd post an update for others researching the topic. I tore my motor down to a bare block, had it honed and put conventional piston rings in. Put the car all back together. My brand new exhaust system was coated in a black nasty soot from all the oil burning. I installed new mufflers this time around (for sound) but it gave me new piece of exhaust to keep an eye on. I re-installed the same black sooty O2 sensors as there's no point in ruining the brand new set if that didn't fix the issue. Put a few hundred miles on the new setup and pulled the mufflers to check. Nice light grey inside of them. No black soot. Pulled plugs and they're staying clean and look a million times better than the plugs that were in the oil burner setup. I also pulled an O2 sensor and it actually burned all that nasty black soot off of it and it's a nice light grey color. This is great news. So for me personally ditching those gapless rings and going back to conventional cured that horrible oil consumption issue. Of course now I no longer have that perfect sealing top ring so I get blow by and a bit of an oily mess out the valve covers, especially the passenger's side, so I'll need to install some catch cans. I'll gladly take that over burning a quart of oil every 200 ~ 250 miles. Based on my experience I couldn't recommend gapless rings to anyone. [/QUOTE]
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Looking for opinions on piston ring gap
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