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Classic Goldwing Technical Forums
General Classic Goldwing Technical Forum
Blow-by and crankcase ventilation-fuel contamination?
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<blockquote data-quote="ekvh" data-source="post: 167724" data-attributes="member: 1179"><p>I started to post this in chilidawgs thread and realized it wasn't related to his topic, so throwing this out for to-cold-to-go-outside discussion. This is in regards to excess pressure in the crankcase: I wonder if any fuel gets by the rings in blow-by? Never thought of that and its potential threat to oil contamination. I am pretty sure mine has more blow-by than it should. It hasn't blown the filter out of the vent tube yet, but you can feel it puff when you remove the filter and rev it. I'm tempted to throw some new rings in after watching Aussiegold and Bronko37's videos. I need to look at my clutch also. </p><p></p><p>In my engine, I'm talking about the 1200 that I shaved the heads 0.025", I am wondering if I am losing what I was trying to gain, from weak rings. Admittedly my shop practices are in the rank amateur stage and I may have gotten some grindings into the mix. I smeared grease around the piston when grinding the valve reliefs, then wiped and washed it out. My compression was in the 140-150 range. I advanced the cams and got it to come up some, but maybe under load it's just passing the energy by. It would be nice to see the rings, whether one has cracked or if they're just warn out. </p><p></p><p>I may just prep my 87 1200 and put it in so I have something to ride and then tear down my current 85 engine. If the 87 has noticeably more snort, I'll know without tearing it down.</p></blockquote><p></p>
[QUOTE="ekvh, post: 167724, member: 1179"] I started to post this in chilidawgs thread and realized it wasn't related to his topic, so throwing this out for to-cold-to-go-outside discussion. This is in regards to excess pressure in the crankcase: I wonder if any fuel gets by the rings in blow-by? Never thought of that and its potential threat to oil contamination. I am pretty sure mine has more blow-by than it should. It hasn't blown the filter out of the vent tube yet, but you can feel it puff when you remove the filter and rev it. I'm tempted to throw some new rings in after watching Aussiegold and Bronko37's videos. I need to look at my clutch also. In my engine, I'm talking about the 1200 that I shaved the heads 0.025", I am wondering if I am losing what I was trying to gain, from weak rings. Admittedly my shop practices are in the rank amateur stage and I may have gotten some grindings into the mix. I smeared grease around the piston when grinding the valve reliefs, then wiped and washed it out. My compression was in the 140-150 range. I advanced the cams and got it to come up some, but maybe under load it's just passing the energy by. It would be nice to see the rings, whether one has cracked or if they're just warn out. I may just prep my 87 1200 and put it in so I have something to ride and then tear down my current 85 engine. If the 87 has noticeably more snort, I'll know without tearing it down. [/QUOTE]
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Classic Goldwing Technical Forums
General Classic Goldwing Technical Forum
Blow-by and crankcase ventilation-fuel contamination?
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